BMW E46/E39/E83 X3 Heater Control Valve – HVAC Coolant Water Valve Solenoid for 323i 325i 328i 330i 525i 530i X3 2.5i 3.0i | Replaces Part No. 64118369805

Restore proper cabin heating control with this replacement heater control valve, designed for select BMW E46 3 Series, E39 5 Series, and E83 X3 models equipped with the corresponding original coolant control valve. Identified by BMW part number 64118369805, this electrically controlled valve regulates the flow of hot engine coolant through the vehicle's heater circuit, helping the climate control system manage cabin temperature.

The heating system in a BMW relies on engine coolant to transfer heat through the heater core. As the engine reaches operating temperature, heated coolant circulates through the cooling system, while the climate control system manages how that heat is used to warm the passenger compartment. The heater control valve plays an important role by regulating coolant flow through the heater circuit according to the vehicle's control strategy.

Over time, the original heater valve can develop internal mechanical or electrical problems. Deteriorated seals, sticking valve mechanisms, damaged electrical connections, or internal solenoid faults may interfere with proper coolant regulation. Depending on the failure, occupants may experience insufficient cabin heat, excessive heating, inconsistent outlet temperatures, or an inability to regulate heat as expected.

This aftermarket replacement uses the corresponding original-style electrically operated valve arrangement for compatible BMW heating systems. The component is intended to connect to the factory coolant hoses and electrical control circuit when matched to the correct BMW part number, connection layout, and vehicle equipment.

A malfunctioning heater control valve can also develop external coolant leaks around its housing or hose connections. Replacing a leaking or defective valve can help restore coolant circuit integrity and normal heater operation, provided there are no additional problems elsewhere in the cooling or climate control system.

Whether restoring the heating system in an E46 325i, addressing a coolant control problem in an E39 530i, or servicing a compatible E83 X3, this replacement heater control valve provides a practical solution for maintaining the original BMW HVAC coolant regulation system.

Key Features

• BMW-Specific Heater Control Valve: Designed for compatible E46, E39, E83 X3, and selected E52 Z8 heating system configurations.

• OEM Replacement Reference: Associated with original BMW part number 64118369805.

• Electrically Controlled Solenoid: Uses an electrical control signal to regulate the valve's operating state.

• Heater Coolant Flow Regulation: Controls hot coolant delivery through the corresponding heater circuit.

• Supports Cabin Temperature Control: Helps the vehicle's HVAC system regulate heating output.

• Original-Style Coolant Hose Connections: Intended for the corresponding factory heater hose arrangement.

• Replacement for Defective Valves: Suitable for addressing confirmed sticking, leaking, or electrically defective original heater valves.

• BMW M52TU and M54 Applications: Supports selected E46 and E39 inline-six engine configurations.

• E83 X3 Compatibility: Designed for selected M54-powered X3 2.5i and 3.0i models.

• Factory-Style HVAC Functionality: Intended to restore the original heater coolant control function without modifying the climate control system.

Benefits of Replacing a Faulty Heater Control Valve

Restores Proper Heater Coolant Regulation

The heater control valve regulates the circulation of hot coolant through the corresponding heater circuit.

When the original valve becomes stuck or electrically inoperative, it may no longer respond correctly to the climate control system.

Replacing a confirmed defective valve helps restore proper coolant regulation.

Helps Maintain Consistent Cabin Heating

A malfunctioning valve may contribute to insufficient heat, intermittent heating, or unexpected warm air from the ventilation system.

A correctly functioning replacement supports the original heating control strategy when the remaining HVAC components are operating normally.

Helps Address Coolant Leaks

Aging plastic valve housings and sealing areas may develop leaks.

Replacing a leaking valve can restore the integrity of the affected connection, provided the related coolant hoses, clamps, and fittings remain serviceable.

Supports Cold-Weather Comfort

Reliable heater operation is important for passenger comfort and windshield defogging during cold weather.

Proper coolant control helps the HVAC system deliver heating as intended.

Maintains the Original BMW Heating System Configuration

The replacement is intended to preserve the vehicle's original electrically operated coolant valve arrangement without requiring a custom heater bypass or modified coolant plumbing.

FITMENT / VEHICLE COMPATIBILITY

BMW 3 Series – E46 Sedan

1999–2005, depending on model and production date

• BMW 320i Sedan: Selected 2001–2005 applications

• BMW 323i Sedan: 1999–2000

• BMW 325i Sedan: 2001–2005

• BMW 325xi Sedan: 2001–2005

• BMW 328i Sedan: 1999–2000

• BMW 330i Sedan: 2001–2005

• BMW 330xi Sedan: 2001–2005

BMW 3 Series – E46 Coupe

2000–2006, depending on model

• BMW 323Ci Coupe: 2000

• BMW 325Ci Coupe: 2001–2006

• BMW 328Ci Coupe: 2000

• BMW 330Ci Coupe: 2001–2006

BMW 3 Series – E46 Convertible

• BMW 323Ci Convertible: Selected 2000 applications

• BMW 325Ci Convertible: Selected 2001–2006 applications

• BMW 330Ci Convertible: Selected 2001–2006 applications

BMW 3 Series – E46 Touring / Wagon

• BMW 320i Touring: Selected applications

• BMW 325i Touring: Selected applications

• BMW 325xi Touring: Selected applications

• BMW 330i Touring: Selected applications

• BMW 330xi Touring: Selected applications

BMW E46 M3

• BMW M3 Coupe: Selected 2001–2006 applications

• BMW M3 Convertible: Selected 2001–2006 applications

The E46 M3 is cataloged by certain specialist BMW suppliers for this heater valve reference. Confirm the actual heater valve configuration using the VIN before guaranteeing M3 fitment.

BMW 5 Series – E39 Sedan / Touring

Primary Cataloged Applications

• BMW 525i Sedan: 2001–2003, with applicable auxiliary heating configuration

• BMW 525i Touring: Selected applications with matching heater system

• BMW 530i Sedan: 2001–2003, with applicable auxiliary heating configuration

• BMW 530i Touring: Selected applications with matching heater system

Important E39 Fitment Restriction: Specialist catalogs identify this valve for E39 525i and 530i vehicles equipped with the corresponding auxiliary heating configuration, with production-date restrictions beginning in September 1998.

Other E39 models may use different heater valve assemblies, including configurations with additional coolant connections or auxiliary circulation pumps.

Do not assume all E39 5 Series vehicles use part number 64118369805.

BMW X3 – E83

Primary Confirmed Applications

• BMW X3 2.5i: 2004–2005, 2.5L M54 engine

• BMW X3 3.0i: 2004–2006, 3.0L M54 engine

These are the principal E83 X3 applications identified by BMW specialist catalogs.

Later E83 Applications: The 2007–2010 X3 3.0si, xDrive28i, and xDrive30i use different engine and equipment configurations. Their compatibility should not be guaranteed without VIN-based verification.

Additional BMW Application

BMW Z8 – E52

• BMW Z8 Roadster: 2000–2003, selected applications

The E52 Z8 is a separately cataloged application for BMW part number 64118369805.

Important Model Exclusions

Do not assume compatibility with:

• BMW E36 3 Series

• BMW E90 / E91 / E92 / E93 3 Series

• BMW E60 / E61 5 Series

• BMW E65 / E66 7 Series

• BMW E53 / E70 X5

• BMW E85 / E86 Z4

• BMW F25 X3

These vehicles may use different heater valve configurations.

Engine Compatibility

BMW M52TU Inline-Six

• BMW 323i / 323Ci: 2.5L M52TU

• BMW 328i / 328Ci: 2.8L M52TU

Compatible with the corresponding E46 heater coolant valve system.

BMW M54 Inline-Six

• BMW 320i / 320Ci: Selected 2.2L M54 applications

• BMW 325i / 325Ci / 325xi: 2.5L M54

• BMW 330i / 330Ci / 330xi: 3.0L M54

• BMW 525i: 2.5L M54, applicable E39 heater configuration

• BMW 530i: 3.0L M54, applicable E39 heater configuration

• BMW X3 2.5i: 2.5L M54

• BMW X3 3.0i: 3.0L M54

BMW S54 Inline-Six

• BMW E46 M3 Coupe: 3.2L S54, selected applications

• BMW E46 M3 Convertible: 3.2L S54, selected applications

Verify the original heater control valve against the vehicle's production configuration.

BMW S62 V8

• BMW Z8 E52: 5.0L S62, selected applications

Additional E46 Engines

Some international-market E46 gasoline and diesel models may use this valve reference.

Compatibility must be established through the original BMW heater system diagram and vehicle production information.

Important: Engine compatibility alone does not guarantee fitment. BMW heater valve configurations can differ according to climate control equipment and vehicle options.

OEM Replacement Part Numbers

Primary BMW Reference

• 64118369805

• 64 11 8 369 805

• 64-11-8-369-805

Aftermarket Cross-References

• URO-013990: URO catalog reference

• 46452: Febi Bilstein catalog reference

These are manufacturer-specific aftermarket references, not additional BMW OEM part numbers.

Part Number Warning: Some aftermarket listings also mention 64118369806, but this should not automatically be treated as an interchangeable replacement. Confirm the specific valve design, coolant connections, and BMW catalog applicability.

Product Specifications

• Product Name: Heater Control Valve / HVAC Coolant Water Valve

• Product Type: Electrically Operated Heater Coolant Control Valve

• Vehicle Manufacturer: BMW

• Primary Compatible Platforms: E46 3 Series, E39 5 Series, E83 X3

• Additional Cataloged Platform: E52 Z8

• Primary OEM Part Number: 64118369805

• URO Cross-Reference: URO-013990

• Febi Bilstein Cross-Reference: 46452

• Valve Configuration: Single-Solenoid Heater Control Valve

• Primary Function: Regulates Engine Coolant Flow Through the Heater Circuit

• System Application: Heating, Ventilation, and Air Conditioning (HVAC)

• Installation Location: Engine Compartment / Heater Coolant Circuit

• Operating Principle: Electromagnetic Solenoid Control

• Electrical Connection: Factory-Style Heater Valve Connector

• Electrical Connector Pin Count: Supplier Verification Required

• Coolant Connection Design: Vehicle-Specific Hose Connection Arrangement

• Exact Hose Port Count: Verify Against Actual Product

• Housing Material: Automotive-Grade Valve Housing; Exact Polymer Requires Supplier Verification

• Internal Valve Materials: Supplier Verification Required

• Valve Voltage Rating: Confirm Against Actual Manufacturer Specifications

• Temperature Rating: Not Independently Verified

• Pressure Rating: Not Independently Verified

• Color: Verify Actual Product Finish

• Mounting Configuration: Original-Style Heater Valve Mounting Arrangement

• Coolant Compatibility: BMW-Approved Engine Coolant Appropriate for the Vehicle

• Electronic Programming Required: Normally No

• Primary Purpose: Cabin Heater Coolant Flow Regulation

• Product Category: Aftermarket HVAC and Engine Cooling Components

Package Contents: One replacement heater control valve.

Coolant hoses, hose clamps, electrical connectors, wiring, mounting brackets, coolant, and other service accessories are not included unless specifically confirmed in the product package.

Compatibility Notes

• BMW OEM Reference: 64118369805 is the primary part number used to identify the corresponding heater control valve.

• Single-Solenoid Design: The replacement must match the original single-solenoid valve arrangement.

• Heater Coolant Regulation: The valve controls coolant flow through the corresponding cabin heater circuit.

• BMW E46 Compatibility: Widely documented across selected E46 3 Series applications.

• BMW 323i / 323Ci: Compatible M52TU-powered E46 applications are listed by specialist suppliers.

• BMW 325i / 325Ci: Compatible M54-powered applications are documented.

• BMW 325xi: Selected all-wheel-drive E46 applications use this valve.

• BMW 328i / 328Ci: Compatible early E46 applications are documented.

• BMW 330i / 330Ci: Compatible M54-powered applications are documented.

• BMW 330xi: Selected all-wheel-drive applications are documented.

• BMW E46 M3: Listed in certain specialist catalogs, but original part verification is required.

• BMW E39 525i: Cataloged with specific auxiliary heating equipment requirements.

• BMW E39 530i: Cataloged with specific auxiliary heating equipment requirements.

• E39 Auxiliary Heating: The corresponding vehicle equipment is an important compatibility requirement.

• E39 Production Date: Certain listings specify September 1998 onward, depending on model and equipment.

• E39 528i: Do not guarantee fitment based solely on the E39 chassis designation.

• E39 540i: V8-powered applications may use different heater valve arrangements.

• BMW X3 E83 2.5i: Confirmed applications include M54-powered models.

• BMW X3 E83 3.0i: Confirmed applications include M54-powered models.

• Later E83 X3: N52-powered variants require separate confirmation.

• BMW Z8 E52: A documented additional application.

• Engine Compatibility: Engine displacement alone does not determine heater valve compatibility.

• Vehicle Production Date: Heater system components can vary during the model's production run.

• Heater Valve Location: The physical valve location differs between vehicle platforms.

• Coolant Hose Layout: The replacement must match the vehicle's original hose connection configuration.

• Hose Port Count: Verify the correct number of coolant ports against the original valve.

• Hose Port Diameter: All coolant connections must match the original hose dimensions.

• Electrical Connector: The plug shape and terminal arrangement must match the original wiring harness.

• Solenoid Operation: A defective solenoid can prevent the valve from responding correctly to HVAC commands.

• Sticking Valve Mechanism: Internal mechanical problems may restrict or allow unwanted coolant circulation.

• Valve Stuck Closed: May contribute to insufficient cabin heat.

• Valve Stuck Open: May contribute to excessive heating or difficulty maintaining the desired cabin temperature, depending on vehicle configuration.

• External Coolant Leakage: Aging housings or connection areas may develop leaks.

• Coolant Hose Condition: Brittle or deteriorated heater hoses may require separate replacement.

• Hose Clamps: Damaged or weak clamps may prevent proper sealing.

• Cooling System Pressure: The valve operates within the pressurized engine cooling system.

• Engine Coolant Temperature: Insufficient engine operating temperature can cause poor cabin heating independently of the valve.

• Thermostat Problems: A defective thermostat may prevent the engine from reaching normal operating temperature.

• Heater Core Restrictions: A blocked heater core can cause weak heating even when the valve is operating correctly.

• Air in Cooling System: Trapped air may interfere with heater performance and coolant circulation.

• Cooling System Bleeding: The appropriate vehicle-specific coolant filling and bleeding procedure must be followed during repairs.

• Climate Control Electronics: Defective HVAC control electronics can produce symptoms similar to a faulty heater valve.

• Electrical Wiring Faults: Damaged wiring or corroded terminals can prevent proper valve operation.

• Auxiliary Coolant Pump: Some BMW heating systems use an additional coolant circulation pump. This product does not replace that pump.

• Dual-Zone HVAC: A single-solenoid valve should not automatically be substituted for a multi-solenoid heater valve assembly.

• Automatic Climate Control: Fitment depends on the installed heating circuit, not simply the presence of automatic HVAC controls.

• Air Conditioning Performance: This component regulates heater coolant; it does not directly control refrigerant flow.

• No Guaranteed A/C Repair: Replacing the heater valve will not repair a failed compressor, refrigerant leak, or defective expansion valve.

• Cabin Temperature Symptoms: Incorrect heating can originate from blend doors, sensors, the heater core, or other HVAC components.

• Coolant Leak Diagnosis: Confirm the source of leakage before replacing the valve.

• No Guaranteed Overheating Repair: A heater valve replacement does not correct radiator, thermostat, cooling fan, or water pump failures.

• Cooling System Contamination: Debris or degraded coolant may affect the performance of a replacement valve.

• Correct Coolant Required: Use coolant meeting the vehicle manufacturer's applicable specifications.

• No Performance Increase: This component restores heating system functionality and does not increase engine power.

• Aftermarket Fitment Tolerances: The actual replacement must match the original valve's dimensions, hose ports, connector, and mounting features.

• Housing Material: Do not advertise a specific polymer or reinforced material without verified supplier information.

• Not a Complete HVAC Kit: Heater core, hoses, coolant pump, wiring, and climate control components are not included.

• Not Genuine BMW: This is an aftermarket replacement unless genuine BMW manufacturing has been independently verified.

• VIN Verification Recommended: Confirm the original heater valve reference, vehicle production date, HVAC equipment, and hose configuration before ordering.

Restore Reliable BMW Cabin Heating Performance

The heater control valve is an important part of the BMW climate control system, regulating hot coolant flow to help maintain comfortable interior temperatures. When the original valve becomes defective, occupants may experience weak heating, inconsistent temperature control, or coolant leakage around the heater circuit.

This replacement HVAC water valve is intended to restore the original coolant regulation function on compatible BMW E46, E39, E83 X3, and selected E52 Z8 applications. When correctly matched to the vehicle's original heating system, it provides a practical solution for replacing a worn, leaking, or malfunctioning heater control valve.

Whether maintaining a BMW 325i, repairing the climate control system in an E39 530i, or restoring cabin heat in an E83 X3, this replacement heater control valve helps preserve the functionality and comfort of the original BMW heating system.

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