{"product_id":"bmw-e36-e46-3-series-z3-m43-m44-replacement-crankcase-breather-hose-pcv-vent-valve-restore-proper-crankcase-ventilation-reduce-vacuum-leaks-improve-engine-idle-replaces-part-no-11157501567-11151743386","title":"BMW E36\/E46 3 Series \u0026 Z3 M43\/M44 Replacement Crankcase Breather Hose \u0026 PCV Vent Valve – Restore Proper Crankcase Ventilation, Reduce Vacuum Leaks \u0026 Improve Engine Idle | Replaces Part No. 11157501567 \/ 11151743386","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRestore proper crankcase ventilation and help eliminate unwanted vacuum leaks with this replacement crankcase breather hose and PCV vent valve designed for select BMW E36 and E46 3 Series and Z3 vehicles equipped with M43 and M44 four-cylinder gasoline engines. The crankcase ventilation system, commonly referred to as the positive crankcase ventilation (PCV) or crankcase breather system, plays an essential role in regulating internal engine pressure, directing combustion blow-by gases back into the intake system, and preventing excessive pressure buildup inside the engine. Maintaining a properly functioning PCV valve and breather hose is important for stable engine idling, correct air-fuel mixture control, and the long-term reliability of engine seals and gaskets.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs factory crankcase ventilation components age, continuous exposure to engine heat, oil vapors, pressure fluctuations, and normal vibration can cause the breather hose to become brittle, develop cracks, or deteriorate around its connection points. The PCV valve can also experience internal wear, diaphragm deterioration, or contamination from accumulated oil residue. These problems may interfere with proper crankcase pressure regulation and allow unwanted air to enter the intake system. Common symptoms include rough idling, fluctuating engine speed, whistling or hissing noises, increased oil consumption, oil leaks around engine seals, and lean air-fuel mixture fault codes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis replacement crankcase breather hose and PCV valve combination is designed to restore the intended ventilation pathway between the engine crankcase and intake system. The PCV valve helps regulate the movement of blow-by gases according to engine operating conditions, while the connected breather hose provides a sealed passage for crankcase vapors. Replacing a malfunctioning valve and deteriorated hose can help correct vacuum leaks, restore appropriate crankcase pressure, and reduce drivability problems associated with a failing ventilation system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned around the factory crankcase ventilation components associated with BMW part numbers 11157501567 and 11151743386, this replacement combination provides a factory-style solution for compatible BMW four-cylinder engine applications. The valve and hose are separate components that perform complementary functions within the ventilation system. Correct installation, secure connections, and properly seated seals are essential for maintaining the intended crankcase pressure regulation and preventing additional intake air leaks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor aging BMW E36, E46, and Z3 vehicles, replacing deteriorated crankcase ventilation components is an important maintenance procedure that can help preserve engine refinement and reliability. The M43 and M44 engine families rely on effective crankcase ventilation to manage blow-by gases and maintain appropriate internal pressure. Addressing worn breather hoses and malfunctioning PCV valves before they cause more extensive problems can help reduce pressure-related oil leaks, improve idle quality when ventilation faults are present, and protect surrounding engine components.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW M43\/M44 Engine Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for select BMW E36 316i, 318i, 318is, 318ti, E46 316i\/318i, and Z3 applications equipped with compatible four-cylinder gasoline engines and the corresponding crankcase ventilation configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRestores Proper Crankcase Pressure Regulation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps maintain the intended movement of blow-by gases from the engine crankcase into the intake system, reducing abnormal pressure conditions caused by a restricted or malfunctioning ventilation valve.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHelps Eliminate Vacuum Leaks:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replacing a cracked breather hose or leaking PCV valve can eliminate unmetered air entering the intake system through damaged crankcase ventilation components.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSupports Stable Engine Idling:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Correcting crankcase ventilation air leaks may help reduce rough idling, fluctuating engine speed, and engine stumbling when the original valve or hose is responsible.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHelps Reduce Excessive Oil Consumption:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Restoring proper crankcase ventilation may reduce oil consumption associated with abnormal crankcase pressure or excessive oil vapor entering the intake system.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSupports Accurate Air-Fuel Mixture Control:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Maintaining sealed crankcase ventilation connections helps prevent unwanted air from disrupting the engine management system's fuel mixture calculations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHelps Prevent Pressure-Related Oil Leaks:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Proper crankcase pressure regulation can reduce unnecessary stress on engine seals and gaskets that may otherwise develop or worsen oil leaks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFactory-Style Replacement Configuration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Intended to replace the corresponding original BMW crankcase ventilation valve and breather hose while maintaining the factory ventilation arrangement.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAddresses Common Aging-Related Ventilation Problems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Suitable for replacing components affected by cracked hoses, brittle connections, internal valve deterioration, damaged diaphragms, or accumulated oil residue.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant Preventive Engine Maintenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Inspecting and replacing failing crankcase ventilation components can help prevent recurring vacuum leaks, unstable idling, and pressure-related engine problems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eRestore the smooth, consistent engine operation of your BMW with a replacement crankcase breather hose and PCV valve designed to maintain proper ventilation flow and crankcase pressure regulation. Replacing deteriorated components can help reduce vacuum leaks, improve idle stability, minimize pressure-related oil leakage, and support accurate air-fuel mixture control. For older BMW four-cylinder engines, maintaining the crankcase ventilation system is an important step toward preserving dependable engine operation and long-term reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eFITMENT: BMW E36\/E46 3 Series \u0026amp; Z3\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eCompatible with select BMW E36 and E46 3 Series and Z3 models equipped with M43, M44, and certain M42 four-cylinder gasoline engines using the corresponding crankcase ventilation valve and breather hose configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E36 3 Series Sedan (Approximately 1993–1998)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 316i – M43B16 1.6L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318i – M43B18 1.8L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318i – M42B18 1.8L Engine, select applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318i – M44B19 1.9L Engine, select applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E36 3 Series Coupe (Approximately 1993–1999)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 316i Coupe – M43B16 1.6L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318is Coupe – M42B18 1.8L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318is Coupe – M44B19 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E36 3 Series Compact (Approximately 1994–2000)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 316i Compact – M43B16 1.6L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 316i Compact – M43B19 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318ti Compact – M42B18 1.8L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318ti Compact – M44B19 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E36 3 Series Touring (Approximately 1995–1999)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 316i Touring – M43B16 1.6L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E36 318i Touring – M43B18 1.8L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E46 3 Series Sedan (Approximately 1998–2001)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E46 316i – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E46 318i – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E46 3 Series Touring (Approximately 1999–2001)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E46 318i Touring – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E46 3 Series Coupe (Select 1999–2001 Applications)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW E46 316Ci – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW E46 318Ci – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW Z3 Roadster E36\/7 (Approximately 1995–2002)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW Z3 1.8 – M43B18 1.8L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW Z3 1.9 – M43TU 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW Z3 1.9 – M44B19 1.9L Engine\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant Fitment Information\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBMW parts-catalog cross-references identify crankcase ventilation valve 11157501567 and breather hose 11151743386 across E36, E46, and Z3 applications. However, the two components have separate application records, and compatibility with one does not automatically establish compatibility with the other.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe listed production years are approximate vehicle application ranges rather than guarantees that both components fit every vehicle produced during those years.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCertain M42-powered BMW E36 models are also associated with the referenced PCV valve. However, their breather hose configuration should be verified separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExact compatibility depends on the vehicle's engine code, production date, crankcase ventilation arrangement, and original BMW part numbers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEngine Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBMW M43 Engine Family:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Four-cylinder gasoline engines used in select BMW E36, E46, and Z3 applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBMW M43TU Engine Family:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Updated four-cylinder gasoline engines used in select later BMW E36, early E46, and Z3 applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBMW M44 Engine Family:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Four-cylinder gasoline engines used in select BMW E36 318i, 318is, 318ti, and Z3 1.9 applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBMW M42 Engine Family:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Earlier four-cylinder gasoline engines used in select BMW E36 applications with corresponding crankcase ventilation components.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplicable Engine Variants\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW M43B16 – 1.6L Four-Cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW M43B18 – 1.8L Four-Cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW M43B19 – 1.9L Four-Cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW M44B19 – 1.9L Four-Cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW M42B18 – 1.8L Four-Cylinder, select applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOEM Replacement Part Numbers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11157501567 – Crankcase Ventilation Valve \/ PCV Valve:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Regulates crankcase ventilation flow and helps maintain appropriate crankcase pressure.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11151743386 – Crankcase Breather Hose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides the corresponding ventilation connection for crankcase gases within compatible engine configurations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePrevious BMW Part Numbers\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11151247133 – Previous Crankcase Ventilation Valve:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Superseded by BMW part number 11157501567.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11151247743 – Previous Breather Hose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Listed as a predecessor to BMW part number 11151743386.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11151739547 – Earlier Breather Hose Reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Listed in BMW parts-catalog supersession records, with restrictions concerning retrospective interchangeability.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e11151739231 – Earlier Breather Hose Reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Associated with the corresponding BMW breather hose replacement family.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eBMW parts-catalog information confirms the supersession from 11151247133 to 11157501567. It also identifies earlier hose references associated with 11151743386, although some historical hose revisions have interchangeability restrictions.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdditional Engine Compatibility Information\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlthough the M42, M43, M43TU, and M44 engines use related crankcase ventilation principles, individual component configurations can differ.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe M43 engine family generally uses a crankcase ventilation arrangement with a pressure-regulating valve and corresponding ventilation connections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe M44 engine family also uses crankcase ventilation components that regulate crankcase gases, but hose routing and component arrangements may differ from M43 applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe later BMW N42 and N46 engines use different crankcase ventilation configurations and should not automatically be considered compatible with these components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCustomers should verify both replacement part numbers individually rather than relying exclusively on the engine family or vehicle model.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFactory-style replacement crankcase breather hose and PCV ventilation valve for compatible BMW four-cylinder gasoline engines.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProfessional installation is recommended, particularly when the source of a crankcase ventilation leak has not been confirmed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAllow the engine to cool completely before beginning the replacement procedure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLocate the original crankcase ventilation valve and associated breather hose connections within the engine compartment.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove any necessary engine covers, intake ducting, or surrounding components required to access the existing ventilation assembly.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the original breather hose for cracks, hardened sections, loose connections, oil residue, or other signs of deterioration.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the PCV valve and surrounding connections for damaged seals, accumulated deposits, or evidence of vacuum leakage.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCarefully disconnect the original breather hose from its corresponding engine and ventilation valve connections.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse caution when removing aged plastic fittings and connectors, as prolonged exposure to engine heat can make these components brittle.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove the original crankcase ventilation valve according to the appropriate BMW service procedure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the valve mounting location and surrounding sealing surfaces for contamination, deterioration, or damage.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompare the replacement PCV valve and breather hose with the original components to confirm the correct mounting configuration, hose length, connection diameter, and overall arrangement.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean the appropriate mounting surfaces and ventilation connections before installing the replacement components.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the required O-rings, gaskets, and sealing components, replacing them when specified by BMW service documentation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstall the replacement PCV valve in the corresponding factory mounting location.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnsure the valve is properly positioned and that all applicable sealing components are correctly seated.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConnect the replacement crankcase breather hose to the appropriate ventilation valve and engine connections.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnsure the hose is fully seated without twisting, kinking, or excessive tension.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSecure all connections using the appropriate factory retaining clips, clamps, or fittings.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRoute the replacement hose according to the original configuration, avoiding contact with moving components, sharp edges, and high-temperature engine parts.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReinstall any intake ducting, engine covers, or surrounding components removed during the replacement procedure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTighten all mounting hardware according to the correct BMW specifications for the specific engine and chassis.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStart the engine and check for abnormal whistling noises, rough idling, visible oil leaks, or signs of improper crankcase ventilation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the replacement hose connections for vacuum leaks and verify that the engine idles normally.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIf rough idling or lean-running fault codes persist, inspect the remaining intake system and crankcase ventilation connections.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerform an appropriate intake smoke test or crankcase pressure test when necessary to confirm that the ventilation system is operating correctly.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eReplacing a mechanical PCV valve and breather hose does not ordinarily require engine control module programming or electronic calibration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHowever, stored fault codes may need to be diagnosed or cleared after the underlying ventilation problem has been repaired.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe exact replacement procedure may vary depending on the BMW chassis, engine variant, and ventilation system configuration. Consult the appropriate BMW repair documentation for vehicle-specific instructions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompatibility Notes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eConfirm Your BMW Engine Code:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Verify that your vehicle is equipped with the corresponding M43, M43TU, M44, or applicable M42 engine before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVerify Both Original BMW Part Numbers:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Confirm that your vehicle uses crankcase ventilation valve 11157501567 and breather hose 11151743386. These are separate components and must be matched individually to the vehicle.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePCV Valve vs. Breather Hose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The PCV valve regulates crankcase ventilation flow, while the breather hose provides the associated gas passage. The components are not interchangeable.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eConfirm Included Components:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The original product title describes a crankcase breather hose with a PCV vent valve. Verify that the product package includes both components before purchasing.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E36 Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Select E36 316i, 318i, 318is, and 318ti models use the corresponding crankcase ventilation components. However, engine variants and production dates can affect compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW E46 Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Early E46 316i and 318i models equipped with M43TU engines are associated with these ventilation components. Later N42\/N46-powered models use different configurations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBMW Z3 Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Select Z3 1.8 and 1.9 models equipped with M43 and M44 engines use corresponding crankcase ventilation components. Verify the original hose and valve arrangement before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eM42 Engine Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e BMW parts listings also identify PCV valve 11157501567 for select M42 applications. However, the complete hose-and-valve combination should not be assumed compatible without checking both original part numbers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eM43 vs. M44 Engine Differences:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Although both engines use crankcase ventilation systems, their hose routing, mounting configurations, and intake connections can differ.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck Historical Part Number Supersessions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Earlier BMW breather hose part numbers may have replacement restrictions. Confirm that the newer hose is compatible with the vehicle's production date and original configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eInspect the Original Breather Hose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compare the replacement hose's length, diameter, shape, connection points, and routing with the existing component before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck the PCV Valve Sealing Surfaces:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Damaged O-rings, deteriorated gaskets, or improperly seated connections can cause vacuum leaks even when the replacement valve is functioning correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVacuum Leaks Can Cause Similar Symptoms:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Rough idling, unstable engine speed, and lean-running conditions can also result from damaged intake boots, intake manifold gaskets, vacuum lines, or other unmetered-air leaks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePCV Valve Failure May Cause Whistling Noises:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A damaged internal diaphragm or pressure-regulating component can produce abnormal whistling or hissing noises. However, similar sounds can originate from other intake leaks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eExcessive Oil Consumption Requires Diagnosis:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Increased oil consumption may result from crankcase ventilation problems, but it can also be associated with worn piston rings, valve stem seals, external oil leaks, or other engine-related conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eInspect Engine Seals and Gaskets:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Excessive crankcase pressure can contribute to oil leakage around aging engine seals and gaskets. Replacing the PCV valve may correct the pressure problem, but already damaged seals may require separate repair.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck for Excessive Engine Blow-By:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Abnormal crankcase pressure can result from restricted ventilation or excessive combustion gases escaping past worn piston rings. Replacing the PCV valve will not correct mechanical engine wear.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eInspect Related Ventilation Connections:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e When replacing the breather hose and PCV valve, inspect adjacent hoses, connectors, and intake fittings for similar aging-related deterioration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCheck for Oil Contamination:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Accumulated oil residue inside ventilation hoses can be associated with normal crankcase vapors, but excessive deposits may indicate a ventilation restriction or another engine-related problem.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eConfirm Included Seals and Hardware:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replacement assemblies may be supplied without additional O-rings, gaskets, retaining clips, or mounting hardware. Verify the actual package contents before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOEM Reference vs. Genuine BMW:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The supplied BMW part numbers identify original equipment components. They do not independently establish that the replacement parts are manufactured or packaged by BMW.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVerify Fitment Using Your VIN:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e For the most accurate compatibility confirmation, check both BMW part numbers against the appropriate BMW electronic parts catalog and compare the replacement components with the originals before purchasing.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eMaintaining a properly functioning crankcase ventilation system is particularly important for older BMW E36, E46, and Z3 vehicles, where aging breather hoses, deteriorated PCV valve diaphragms, and damaged ventilation connections can contribute to vacuum leaks, unstable idling, excessive oil consumption, and pressure-related engine problems. Replacing a malfunctioning PCV valve and deteriorated breather hose with correctly matched components helps restore the intended crankcase ventilation pathway, supports stable engine operation, and reduces the likelihood of recurring ventilation-related problems. Inspecting the surrounding intake connections, sealing components, and remaining ventilation hoses during replacement can further improve engine reliability and help preserve the smooth, dependable operation of your BMW four-cylinder engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BAVMODS®","offers":[{"title":"Default Title","offer_id":49259352490174,"sku":null,"price":63.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/8788\/1150\/files\/1_771b8443-f1a0-4f6e-8330-dad21ceb4a26.jpg?v=1792462583","url":"https:\/\/bavmods.com\/es\/products\/bmw-e36-e46-3-series-z3-m43-m44-replacement-crankcase-breather-hose-pcv-vent-valve-restore-proper-crankcase-ventilation-reduce-vacuum-leaks-improve-engine-idle-replaces-part-no-11157501567-11151743386","provider":"BAVMODS®","version":"1.0","type":"link"}