BMW Heater Control Valve Seal and Diaphragm Rebuild Kit — OEM 64118374994
This seals-only rebuild kit repairs internal sealing wear in compatible BMW heater control valves. It is intended for valves that leak coolant, remain stuck in one position, provide weak cabin heat, or produce different temperatures at the left and right vents while the original valve housing and solenoids are still serviceable.
Fits OEM #64118374994 and the P/N groups listed below.
Important: Match the P/N on the original heater valve before ordering; BMW used different valve versions within the same chassis.
When to Inspect This Part
- HVAC system blows only hot air
- HVAC system blows only cold air
- cabin temperature cannot be adjusted correctly
- different air temperature from the left and right vents
- weak cabin heat
- coolant leakage at the valve
What's Included
- 2 × 32 mm diaphragms
- 2 × 26 mm sealing and centering rings
- 2 × 21 mm O-rings
- 1 × 46 mm O-ring
Important Limitations
This is a seals-only repair kit. It does not include a complete heater valve, electrical solenoids, valve housings, or cone valves. A cracked housing, corroded internal hard part, or failed solenoid requires separate repair or replacement.
OEM Part Numbers and Vehicle Fitment
| Part Number / P/N | Vehicle fitment |
|---|---|
| 64118374994 64118372004 64118391796 64118368462 64118391348 |
|
| 64128374995 64128372016 64128391000 |
|
| 64118391417 64111382299 64111391958 |
|
| 64116908294 |
|
| 64126927915 |
|
Part Number / PN
64118374994, 64118372004, 64118391796, 64118368462, 64118391348, 64128374995, 64128372016, 64128391000, 64118391417, 64111382299, 64111391958, 64116908294, 64126927915, 647409988203, 1147412042, 1147412137
Important Fitment Check
Compare the P/N, valve design, electrical connectors, and housing layout with the original unit. Vehicle model alone is not sufficient for fitment confirmation.
FAQ
How do I confirm fitment?
Match the P/N on the original valve to the corresponding group above and compare the physical valve design before ordering.
What problems can this kit address?
It addresses internal seal and diaphragm wear that can cause coolant leakage, weak heat, a stuck temperature setting, or different vent temperatures.
Does the kit include cone valves?
No. This seals-only version does not include cone valves, solenoids, housings, or a complete heater valve.
Can it repair a cracked housing or failed solenoid?
No. The original housing, solenoids, and internal hard parts must remain serviceable.
Why are several P/N groups listed?
BMW used several heater valve versions across these chassis. The P/N group identifies the correct vehicle application more reliably than chassis alone.
Read All
Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings