Genuine BMW is best, luckily the genuine caps are affordable
Pros: best, affordable
Vehicle:
BMW
Reviews of OEM BMW expansion tank cap
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6 votes
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2 reviews
Description
OEM BMW
Germany
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Oem 2.0 bar expansion tank cap is a liability to the cooling system usually resulting in catastrophic failures. I'm using the now recommended 1.4 bar cap, less chance of ruptured hoses & tanks. Bmw now recommends the 1.4 bar! And better peace of mind
Pros: less chance of ruptures, better peace of mind
Cons: liability, catastrophic failures
Vehicle:
BMW
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What we know about OEM BMW expansion tank cap
The brand is registered in Germany.
In March 2026, PartReview does not yet have a formed opinion of OEM BMW expansion tank cap. You can help by adding a review for OEM BMW expansion tank cap.
Currently there are 2 reviews and 6 votes. Average rating — 4.5 out of 5. Vote balance: 6 up, 0 down.
Users also evaluated the qualities of OEM BMW expansion tank cap:
- Seal - no coolant smell or wetness around the tank cap - rated positively. 5 points out of 5.
- Pressure release - short hiss after shutdown is normal and brief - rated positively. 4.5 points out of 5.
- Temperature stability - gauge stays steady in traffic when the cap holds pressure - no rating yet
Expansion tank cap OEM BMW in car-specific ratings
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