BMW E36/E46/E39/E60/E61 M52 M54 Aluminum Oil Filter Cap with Oil Cooler Adapter – CNC Billet Oil Filter Housing Cover with AN10 Fittings & Sensor Ports | Replaces Part No. 11421744000, 11421741000

Upgrade the engine oil cooling system of your BMW with this aluminum oil filter housing cap and external oil cooler adapter, designed for select BMW E36, E46, E39, E60, and E61 vehicles equipped with compatible M52, M52TU, and M54 inline-six engines. This performance-oriented oil filter cover replaces the factory-style oil filter housing cap while providing dedicated connections for an external engine oil cooler and optional oil monitoring sensors. Featuring a CNC-machined aluminum alloy body, an anodized finish, dual AN10 oil cooler connections, and two 1/8-inch NPT sensor ports, the adapter offers a practical solution for BMW owners looking to add external engine oil cooling without replacing the complete factory oil filter housing.

BMW M52 and M54 engines use a cartridge-style oil filtration system with a removable cap mounted to the engine's oil filter housing. The original cap seals the filter assembly and maintains the intended oil flow path through the filtration system. Although this arrangement is suitable for factory operation, the standard cap does not provide dedicated connections for a conventional external oil cooler circuit.

This replacement oil filter cap incorporates additional oil passages and threaded connections that allow engine oil to be routed through a compatible external oil cooler system. When correctly configured, an external oil cooler can help manage elevated engine oil temperatures during sustained high-load driving, performance applications, or track use.

The adapter is manufactured from aluminum alloy and features a machined housing designed to fit the corresponding BMW cartridge oil filter assembly. Its rigid construction provides mounting locations for oil cooler fittings and optional pressure or temperature monitoring equipment.

Two AN10 connections allow compatible oil lines to be attached to the adapter. The two additional 1/8-inch NPT ports provide installation points for suitable aftermarket sensors, allowing drivers to monitor engine oil conditions when paired with compatible gauges or electronic monitoring equipment.

Because the adapter becomes part of the engine's pressurized lubrication system, installation accuracy is essential. Correct sealing, proper oil routing, adequate hose clearance, compatible fittings, and confirmation of normal engine oil pressure are necessary before the vehicle is operated.

For BMW enthusiasts building a performance-oriented M52 or M54 engine, this oil cooler adapter cap provides an alternative to replacing the entire oil filter housing with a different oil cooler-equipped configuration. It offers a convenient mounting solution for external oil cooling hardware while retaining the original cartridge-style filter housing architecture on compatible engines.

Key Features

• External Oil Cooler Adapter: Provides oil line connections for integrating a compatible external oil cooler into the engine lubrication system.

• CNC-Machined Aluminum Alloy: Features a machined aluminum housing designed for precise fitment and durability.

• Anodized Surface Finish: Provides a finished exterior surface with additional resistance to oxidation and normal engine compartment exposure.

• Dual AN10 Oil Connections: Includes two oil cooler connection points intended for compatible AN10 fittings and oil lines.

• Two 1/8-Inch NPT Sensor Ports: Allows the installation of compatible aftermarket oil temperature or oil pressure sensors.

• Factory-Style Oil Filter Housing Position: Replaces the original oil filter housing cap on compatible BMW M52/M54 applications.

• Supports Performance Oil Cooling: Enables the addition of an external oil cooler to help manage oil temperature under demanding operating conditions.

• Retains Cartridge Oil Filter Architecture: Designed to work with the corresponding BMW oil filter housing rather than requiring replacement of the complete housing.

• Suitable for Street and Track Builds: Useful for compatible vehicles requiring additional oil temperature management during sustained engine loading.

• Performance-Focused Engine Upgrade: Provides a mounting solution for oil cooler lines and optional monitoring equipment as part of a properly engineered oil cooling system.

This aluminum oil filter cap adapter offers a convenient way to integrate external oil cooling hardware into compatible BMW engines. Its dedicated oil line connections and sensor ports provide flexibility for performance applications while retaining the factory-style oil filter housing location.

FITMENT: BMW E36, E46, E39, E60 & E61

BMW E36 3 Series – M52 Engine

• BMW E36 323i – Approximately 1995–1999, depending on market

• BMW E36 323is – Approximately 1998–1999, North American market

• BMW E36 328i – Approximately 1995–1999, depending on market

• BMW E36 328is – Approximately 1996–1999, North American market

BMW E46 3 Series – M52TU / M54 Engines

• BMW E46 323i – 1999–2000

• BMW E46 323Ci – 2000

• BMW E46 325i – 2001–2005

• BMW E46 325Ci – 2001–2006, subject to production-date verification

• BMW E46 325xi – 2001–2005

• BMW E46 328i – 1999–2000

• BMW E46 328Ci – 2000

• BMW E46 330i – 2001–2005

• BMW E46 330Ci – 2001–2006, subject to production-date verification

• BMW E46 330xi – 2001–2005

BMW E39 5 Series – M52 / M52TU / M54 Engines

• BMW E39 523i – Select M52/M52TU applications

• BMW E39 525i – Approximately 2001–2003

• BMW E39 528i – Approximately 1997–2000

• BMW E39 530i – Approximately 2001–2003

BMW E60 5 Series – M54 Engine

• BMW E60 525i – Approximately 2004–2005

• BMW E60 530i – Approximately 2004–2005

BMW E61 5 Series Touring – M54 Engine

• BMW E61 525i Touring – Select early M54 applications

• BMW E61 530i Touring – Select early M54 applications

Additional BMW Applications Using Related Oil Filter Cap Configurations

• BMW E83 X3 2.5i – M54 engine

• BMW E83 X3 3.0i – M54 engine

• BMW E53 X5 3.0i – M54 engine

• BMW Z3 2.0i / 2.2i / 2.5i / 2.8i / 3.0i – Select M52/M54 applications

• BMW E85 Z4 2.2i / 2.5i / 3.0i – Select M54 applications

Important Fitment Information

This product is intended for compatible BMW engines using the corresponding cartridge-style oil filter housing and removable cap.

The engine family and original oil filter housing configuration must be verified before purchase.

BMW E60 and E61 vehicles equipped with later N52 or other engine families are not automatically compatible.

The listed model years represent potential applications and may vary by production date and market.

Engine Compatibility

BMW M52 Engines

• M52B20 – 2.0L Inline-Six, where the correct housing is fitted

• M52B25 – 2.5L Inline-Six

• M52B28 – 2.8L Inline-Six

BMW M52TU Engines

• M52TUB20 – 2.0L Inline-Six

• M52TUB25 – 2.5L Inline-Six

• M52TUB28 – 2.8L Inline-Six

BMW M54 Engines

• M54B22 – 2.2L Inline-Six

• M54B25 – 2.5L Inline-Six

• M54B30 – 3.0L Inline-Six

Additional Engine Family

• Certain M56 engines may use a compatible oil filter cap arrangement, but exact fitment must be confirmed before purchase.

Not Automatically Compatible

• BMW N52 engines

• BMW N54 engines

• BMW N55 engines

• BMW S54 M3 engines

• BMW V8 engines

• BMW diesel engines

• Engines using a different oil filter housing or cap design

OEM Reference Part Numbers

Original BMW Oil Filter Cap References

• 11421744000

• 11 42 1 744 000

• 11421741000

• 11 42 1 741 000

These references identify factory-style oil filter caps associated with compatible BMW engine applications.

Important: The original BMW caps do not provide the same external oil cooler and sensor connections as this aftermarket performance adapter.

The product should be described as a performance replacement or upgrade for the compatible cap configuration—not as an identical Genuine BMW component.

Installation

1. Confirm that the vehicle has a compatible M52, M52TU, or M54 engine and corresponding oil filter housing.

2. Verify that the adapter matches the original oil filter cap dimensions and sealing arrangement.

3. Inspect the replacement adapter for machining defects, damaged threads, and irregular sealing surfaces.

4. Confirm that the external oil cooler, hoses, fittings, and optional thermostat are compatible with the adapter.

5. Determine the required oil flow direction through the adapter and external cooler circuit.

6. Park the vehicle securely and allow the engine to cool completely.

7. Disconnect the battery if required for access or related installation work.

8. Protect surrounding engine components from spilled oil.

9. Remove any engine covers or intake components necessary to access the oil filter housing.

10. Inspect the original oil filter housing for cracks, oil leaks, or damaged threads.

11. Carefully remove the original oil filter housing cap.

12. Remove the existing oil filter element according to the applicable service procedure.

13. Inspect the oil filter housing's sealing surfaces.

14. Compare the replacement adapter with the original cap.

15. Confirm that the replacement uses the correct oil filter element and internal support arrangement.

16. Install the correct new sealing O-ring in its specified groove.

17. Lubricate the O-ring with clean engine oil as appropriate.

18. Install the compatible oil filter element and any required internal components.

19. Fit the adapter onto the oil filter housing without cross-threading.

20. Tighten the adapter according to the actual adapter manufacturer's specification; do not assume the original plastic cap torque applies.

21. Install the appropriate AN10 oil cooler fittings and compatible seals.

22. Connect the oil cooler feed and return lines according to the verified flow path.

23. Install a suitable external oil cooler in a location with adequate airflow and protection.

24. Route oil hoses away from exhaust components, moving parts, and sharp edges.

25. Secure the hoses using suitable brackets and supports.

26. Install compatible oil pressure or temperature sensors in the 1/8-inch NPT ports if required.

27. Properly seal any unused sensor ports with suitable threaded plugs.

28. Check for clearance between the adapter, intake manifold, engine covers, and surrounding components.

29. If minor clearance modification is required, confirm that the modification is safe and does not affect structural or functional components.

30. Refill or adjust engine oil quantity to account for the added external oil cooler and hose volume.

31. Prime the external oil circuit according to the cooler system manufacturer's procedure.

32. Verify correct oil circulation and engine oil pressure before normal operation.

33. Inspect all fittings, plugs, hoses, and the oil filter cap sealing area for leaks.

34. Monitor oil pressure and oil temperature during initial operation.

35. Shut down the engine immediately if oil pressure is abnormal or a significant oil leak develops.

36. Allow the engine to cool and reinspect all connections.

37. Check the oil level and correct it according to the vehicle's specified procedure.

38. Reinspect the complete external oil cooler system after initial road use.

Important Installation Safety Information

This adapter becomes part of the engine's pressurized lubrication system.

Incorrect oil routing, an open cooler port, a blocked hose, improper sealing, or a leaking fitting can cause rapid oil pressure loss and severe engine damage.

The external oil cooler circuit must be properly completed before the engine is operated.

Do not use this adapter with disconnected or unsealed oil cooler ports.

Professional installation is strongly recommended.

Compatibility Notes

• BMW M52/M54 Oil Filter Housing Required: The adapter is intended for compatible BMW cartridge oil filter housings used on selected M52, M52TU, and M54 engines.

• Not a Complete Oil Filter Housing: This product replaces the oil filter housing cap and provides external oil cooler connections. It does not replace the complete engine-mounted housing.

• External Oil Cooler Function: The adapter provides connection points for an external cooler. The cooler itself must be installed separately unless included in a verified kit.

• BMW E36 Compatibility: Applies to select M52-powered E36 models with the corresponding oil filter housing. Earlier or differently configured engines require verification.

• BMW E46 Compatibility: Applies to select M52TU and M54-powered E46 models using the correct cartridge oil filter housing.

• BMW E39 Compatibility: Applies to select M52, M52TU, and M54-powered E39 models. V8 and diesel models are not included.

• BMW E60/E61 Compatibility: Applies only to select early M54-powered 525i and 530i applications. Later N52-powered models use different components.

• BMW E46 M3 Exclusion: The S54 engine has a different oil filter and oil cooling configuration. Do not assume this adapter fits the E46 M3.

• BMW E39 M5 Exclusion: The S62 V8 uses a different lubrication system and is not compatible.

• BMW E83 X3 Compatibility: Select M54-powered X3 2.5i and 3.0i applications may use the corresponding oil filter cap arrangement.

• BMW E53 X5 Compatibility: Select X5 3.0i models with the M54 engine are potential applications. X5 V8 models are excluded.

• BMW Z3/Z4 Compatibility: Select M52 and M54-powered Z3 and Z4 models are potential applications, subject to housing verification.

• N52 Engine Exclusion: Later BMW N52-powered models should not be treated as compatible merely because they share a chassis designation.

• M56 Compatibility: Some aftermarket catalogs list M56 compatibility. Verify the exact oil filter housing before advertising guaranteed fitment.

• Original Cap Reference 11421744000: Identifies a factory-style BMW oil filter cap application associated with this adapter family.

• Original Cap Reference 11421741000: Listed as an additional compatible cap reference by aftermarket suppliers. Confirm against the original housing.

• AN10 Connections: The advertised configuration uses two AN10 oil cooler connections. Confirm the actual fittings supplied with the product.

• M18 × 1.5 Adapter Threads: Some versions use M18 × 1.5 threaded ports beneath the AN fittings. Verify the actual port dimensions before purchasing replacement adapters.

• 1/8-Inch NPT Sensor Ports: Two ports are intended for compatible aftermarket oil monitoring sensors or properly sealed plugs.

• Sensors Not Automatically Included: Oil temperature sensors, oil pressure sensors, gauges, and wiring are separate components unless the package explicitly includes them.

• Sensor Port Plugs: Unused sensor ports must be securely sealed. Verify whether suitable plugs are included.

• Oil Cooler Not Automatically Included: Do not advertise a complete oil cooler kit unless the radiator-style cooler, lines, and associated fittings are physically included.

• Oil Cooler Thermostat: A properly selected oil thermostat may be beneficial for controlling oil temperature during warm-up. Thermostat requirements depend on the overall system design.

• Oil Flow Direction Must Be Verified: The adapter's oil inlet and outlet paths must be identified before connecting an external cooler or thermostat.

• No Guaranteed Temperature Reduction: Actual oil temperature changes depend on cooler size, airflow, ambient temperature, engine load, oil flow, and thermostat configuration.

• Oil Pressure Must Be Maintained: Improper cooler sizing, restrictive hoses, incorrect routing, or leaks can affect lubrication performance.

• Oil Filter Compatibility: Confirm that the adapter supports the correct filter element and internal filter arrangement for the vehicle.

• O-Ring Compatibility: The cap must use the correct sealing O-ring in the proper location. Reusing damaged or incorrectly sized seals can cause leaks.

• Aluminum Cap Torque: Do not automatically apply the factory plastic cap torque specification to an aftermarket aluminum adapter without manufacturer confirmation.

• Intake Manifold Clearance: Certain applications may require minor clearance adjustments around the intake manifold or nearby covers. Confirm the exact interference before modifying components.

• Engine Cover Clearance: Some factory engine covers may require modification or may not fit with the added cooler fittings.

• Oil Hose Routing: Hoses must be secured away from exhaust heat, moving belts, pulleys, steering components, and sharp edges.

• Heat Protection: Oil cooler lines routed near high-temperature components may require additional thermal protection.

• Added Oil Capacity: External oil cooler systems increase total oil volume. The correct fill quantity must be determined for the completed installation.

• Leak Inspection: All fittings, plugs, cap seals, and hose connections must be inspected during initial operation and subsequent maintenance.

• Anodized Aluminum Construction: The advertised adapter features an anodized aluminum body. Exact alloy grade and anodizing specification should not be claimed without documentation.

• Performance Application: This product is intended for external oil cooling and monitoring upgrades. It does not independently increase engine horsepower.

• No Programming Required: Installation of the mechanical adapter does not normally require ECU programming. Aftermarket electronic sensors may require separate gauge or controller setup.

• Not a Repair for Existing Oil Pressure Problems: A worn oil pump, blocked pickup, damaged bearings, or other lubrication faults require separate diagnosis.

• Not a Replacement for Oil Filter Housing Gaskets: Oil leaks originating from the housing-to-engine gasket will not necessarily be corrected by replacing the cap.

• Professional Installation Recommended: Incorrect installation can cause oil loss and engine damage. The complete lubrication circuit must be verified before use.

• Aftermarket Performance Component: This is an aftermarket oil cooler adapter and should not be represented as a Genuine BMW component.

• VIN and Housing Verification: Confirm the original oil filter cap, engine code, housing configuration, and available installation clearance before purchase.

Performance Oil Cooling & Engine Protection

Managing engine oil temperature is an important consideration for BMW vehicles used in demanding driving conditions. Sustained high engine loads, increased power output, and repeated track use can generate additional heat within the lubrication system.

This aluminum oil filter cap adapter provides a practical way to integrate a compatible external oil cooler into select BMW M52 and M54 engine applications. Its dual AN10 connections and optional sensor ports allow the cooling system to be configured around the vehicle's operating requirements.

When properly installed with a suitable external oil cooler, correctly routed oil lines, appropriate sealing components, and verified oil pressure, the adapter can support improved oil temperature management while retaining the factory-style cartridge oil filter housing arrangement.

For BMW E36, E46, E39, E60, and E61 owners preparing a performance street car or track-focused build, this oil cooler adapter offers a flexible foundation for upgrading engine oil cooling and monitoring capabilities.

Please refer to the “Fitment” section in the product description for compatibility details.