Genuine OEM 64118391417 - HVAC Heater Control Valve

Product Overview

This Genuine OEM 64118391417 HVAC heater control valve is a factory-original component engineered for BMW vehicles from 1988 to 1997. The valve regulates coolant flow to the heater core, controlling cabin temperature output. It fits a wide range of classic BMW models including the E28 and E34 5 Series sedans, E32 7 Series sedans, E31 8 Series coupes, and select M5 variants across multiple engine configurations. As a Genuine BMW part, this valve meets original equipment specifications and carries full factory quality assurance.

Symptoms of a Failing HVAC Heater Control Valve

• No heat output from cabin vents, even after engine reaches operating temperature
• Inconsistent or partial heating; some vents warm while others remain cold
• Coolant leaking from the valve body or connection points
• Hissing or gurgling sounds from the heater core area during operation
• Visible coolant pooling under the vehicle near the firewall or engine bay
• Stuck valve position preventing proper temperature modulation

Cross Reference Numbers

This Genuine OEM 64118391417 is equivalent to or replaces the following part numbers: 6411839141764118391417.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• BMW 525i 2.5 L6 Gas (E34): 1989–1995
• BMW 530i 3.0 V8 Gas (E34): 1994–1995
• BMW 535i 3.5 L6 Gas (E34): 1989–1993
• BMW 540i 4.0 V8 Gas (E34): 1994–1995
• BMW 735i 3.5 L6 Gas (E32): 1988–1992
• BMW 735iL 3.5 L6 Gas (E32): 1988–1992
• BMW 740i 4.0 V8 Gas (E38): 1993–1994
• BMW 740iL 4.0 V8 Gas (E38): 1993–1994
• BMW 750iL 5.0 V12 Gas (E32): 1988–1994
• BMW 750iL 5.0 V12 Gas (E38): 1993
• BMW 840Ci 4.0 V8 Gas (E31): 1994
• BMW 840Ci 4.4 V8 Gas (E31): 1996–1997
• BMW 850Ci 5.0 V12 Gas (E31): 1991–1994
• BMW 850Ci 5.4 V12 Gas (E31): 1995–1997
• BMW 850CSi 5.6 V12 Gas (E31): 1994–1995
• BMW 850i 5.0 V12 Gas (E31): 1991–1992
• BMW M5 3.6 L6 Gas (E34): 1991–1993

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete heater system repair, many owners replace the following at the same time:

• Heater core or heater core hoses if leaking or clogged
• Thermostat and housing if temperature regulation is erratic
• Coolant and coolant flush to remove debris from the system
• Heater hose clamps and connectors if corroded or damaged

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Frequently Asked Questions

How do I know if my BMW E32, E34, or E31 heater control valve needs replacement?

The most common sign is a complete loss of cabin heat despite the engine running at normal operating temperature. You may also notice coolant leaking from the valve body, hissing sounds from the heater lines, or inconsistent temperature control where some cabin zones remain cold. If the valve is stuck in the closed position, no heat will reach the cabin at all.

What is a heater control valve and why does it fail?

The heater control valve is a thermostatic or electrically controlled device that regulates the flow of hot engine coolant through the heater core. Over time, internal corrosion, mineral deposits from coolant, or mechanical wear can cause the valve to stick or fail completely. BMW models from the late 1980s and 1990s are particularly susceptible to valve failure as the original seals and internal components degrade.

Is this a Genuine BMW part?

Yes. This is a Genuine OEM part manufactured to original BMW specifications. It carries the factory part number 64118391417 and meets all original equipment standards for fit, function, and durability. Using a Genuine part ensures compatibility with your classic BMW's climate control system and is often preferred by BMW dealerships and serious enthusiasts.

Can I install this heater control valve myself, or do I need a technician?

Installation difficulty depends on your vehicle's specific layout and your mechanical skill level. The valve is typically located on or near the firewall and requires disconnecting heater hoses and possibly some trim panels. You will need basic hand tools, a drain pan for coolant, and hose clamps. Many DIY enthusiasts can complete the job in 1 to 3 hours. If you are uncomfortable working with coolant systems or removing trim, professional installation is recommended to avoid air locks in the cooling system.

What coolant should I use after replacing the valve?

Consult your BMW owner's manual or service documentation for the correct coolant specification for your year and model. Classic BMW vehicles typically use a specific coolant type to protect against corrosion and maintain proper heat transfer. After valve replacement, flush the system and refill with fresh coolant to remove any debris introduced during the job.

Will replacing the heater valve fix my heating problem, or could something else be wrong?

A failing heater control valve is a common cause of no-heat complaints, but other issues can produce similar symptoms. A clogged heater core, a failed thermostat, a broken heater blend door, or a malfunctioning heater fan can all prevent warm air from reaching the cabin. If you replace the valve and heating is still absent, have a technician diagnose the heater core, blend door actuator, and fan operation.

Frequently Asked Questions

Order Genuine OEM 64118391417 today. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your BMW.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.