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
Reviews of Wahler parts For Business
Average Rating
?
The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
2.9
Manufacturer Ranking
#181
28
Spare Parts
1
Country
Germany
Spare Parts
Comparisons
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
I have had a car not bleed properly/ run hot (but not overheat) only when using the wrong thermostat. Replacing it with Wahler fixed the issue.
Pros: fixed bleeding issue
Vehicle:
Porsche
A proper Wahler thermostat is what solved it.
Pros: solved issue
Vehicle:
Porsche
My 2007 MKV 2.5 Jetta is still having overheat problems even after changing the tstat to a OEM (Wahler) and the waterpump to one with metal impeller, which works way better than the original.
Pros: metal impeller works better
Cons: still having overheat problems
Vehicle:
Volkswagen Jetta
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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Owner reviews of Wahler products
The Wahler brand is registered in Germany. Official website is not specified yet.
In March 2026, PartReview recorded 28 reviews across 1 part by Wahler. Average rating — 2.9 out of 5.
Wahler is in the PartReview manufacturers ranking, currently at position 181. Over the last 30 days it dropped by 0 points.
Popular Wahler parts
The most popular Wahler products on PartReview:
- Thermostat Wahler - 28 reviews. PR Score — 48, average rating — 2.9.
Most owner reviews about Wahler parts are collected on these pages.
Top-rated Wahler parts
Wahler achieved top positions in these PartReview part rankings:
- Best thermostat — ranked 13 among 15 manufacturers. Received 796 votes.
Comparisons of Wahler parts
The most interesting comparisons of Wahler with other manufacturers help you see which is better: