vs
Thermostat OEM Audi or Wahler
In the past and up to several months ago, I’ve always gone with Saleri (Italy) pumps and Wahler (Germany) thermostats for the M54 and have had great results.
Pros: great results
I have an 06 Audi A3 2.0T Sportback with just over 105k miles; recently replaced the thermostat, spark plugs and coil packs. Other than being in need of some new brakes and a bit of cosmetic love, she's running strong.
Pros: running strong
Cons: needs new brakes
Vehicle:
Audi A3
Mileage: 168981 km
I had a wahler thermostat and my temp range was 93-96
Pros: stable temperature range
Vehicle:
BMW
I got a Wahler thermostat once who was the OEM maker for MB, the only difference between the Wahler and the old MB one was that there was a spot where the MB logo was, on the Wahler one that logo was gone, looks like it was there, but someone with an angle grinder scratched out the MB logo so it probably came off the same line that made the MB part.
Pros: OEM quality, identical to original
Recently had the exact same issue on a 14 a6 ended up being a DOA t stat I compared the shaft length on the new t start to the 2nd new t stay and sure enough it protruded out about a mm further just enough to not seal properly causing the over cooling after the swap no more issues.
Pros: no more issues
Cons: over cooling
Vehicle:
Audi A6
Had this happen to our 2018 Q5 a few months back, 35k miles on the SUV. Thermostat issue plus some other stuff.
Vehicle:
Audi Q5
Mileage: 56327 km
I recently changed the thermostat on my dad's car as well, I went with a wahler, and I'm observing the same things.
Cons: observing the same things
I decided to try another thermostat, this time a Wahler and nothing has changed as the car will still not get up to temperature and no hot air.
Cons: car not reaching temperature, no hot air
Vehicle:
BMW
I changed on mine 2-3 months ago with a new one from Wahler/Borg Warner and now it's leaking through the connector.
Cons: leaking through connector
I have experienced same with Wahler thermostat.
Cons: same problem experienced
Vehicle:
BMW
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Which thermostat to choose — OEM Audi or Wahler?
If choosing thermostat across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare thermostat across these categories:
- PR Score.
- Overall ranking.
- Vote balance.
- Average rating.
- Number of reviews.
- Feature ratings.
- Car owners’ choice.
Which thermostat are better — Wahler or OEM Audi?
In March 2026 on PartReview, thermostat OEM Audi were overall better than Wahler.
- OEM Audi received a PR Score of 75 out of 100, and Wahler scored 48 points.
- OEM Audi ranked 7 in the overall ranking, and Wahler ranked 13.
- The average rating is higher for OEM Audi (4) than for Wahler (2.9).
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Thermostat OEM Audi have better feature ratings than Wahler:
- Overheating - owners believe, that this property for OEM Audi is better than Wahler.
- Slow warm-up - drivers claim, that this property for Wahler is outperforms OEM Audi.
- Cabin heat - reviews suggest, that this property for Wahler is preferred to OEM Audi.
Which thermostat are more popular — OEM Audi or Wahler?
Thermostat OEM Audi and Wahler were equally popular according to data in March 2026.
By vote balance, thermostat OEM Audi surpassed Wahler:
- For OEM Audi, the ratio of positive (27) to negative (9) votes is 18 votes.
- For Wahler, the ratio of positive (41) to negative (44) votes is -3 votes.
By number of reviews, thermostat Wahler surpassed OEM Audi:
- For thermostat OEM Audi there are 11 reviews: 7 positive, 3 neutral, 1 negative.
- For thermostat Wahler there are 28 reviews: 13 positive, 1 neutral, 14 negative.
Which thermostat do car owners prefer — OEM Audi or Wahler?
In March 2026, according to PartReview, thermostat OEM Audi and Wahler have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
Other comparisons of thermostat
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of thermostat OEM Audi with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Honda.
Also available: comparisons of thermostat Wahler with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, Duralast.
You can also see who is better among other thermostat manufacturers: Wahler or MotoRad, OEM Volkswagen or MotoRad, Mahle or MotoRad, OEM Mazda or MotoRad, MOPAR or MotoRad.