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.
I had the same exact car with same exact problem. I changed the thermostat once and it fixed it for about a year. The issue came back and I changed again and it fixed it again... So I'd say get an OEM one if you can.
our 2009 CRV was taking a long time to get to operating temperature and then fluctuating a lot while driving. a new thermostat fixed it.
Don\u2019t listen to these people I have an 08 ex Sam problem replaced thermostat 2 weeks ago in 15 minutes problem is gone
I had a wahler thermostat and my temp range was 93-96
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.
I recently changed the thermostat on my dad's car as well, I went with a wahler, and I'm 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.
I changed on mine 2-3 months ago with a new one from Wahler/Borg Warner and now it's leaking through the connector.
I have experienced same with Wahler thermostat.
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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:
In March 2026 on PartReview, thermostat OEM Honda were overall better than Wahler.
Thermostat Wahler and OEM Honda were equally popular according to data in March 2026.
By vote balance, thermostat OEM Honda surpassed Wahler:
By number of reviews, thermostat Wahler surpassed OEM Honda:
In March 2026, according to PartReview, thermostat OEM Honda led more car-specific ratings than Wahler:
OEM Honda are chosen by owners of cars such as: Honda Civic, and others.
Thermostat Wahler have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of thermostat Wahler with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Audi.
Also available: comparisons of thermostat OEM Honda with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Audi.
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.
