Thermostat Wahler or OEM BMW

PartReview Score

Rank #13 in ranking

-3

2.9

Cabin heat

1.8

Overheating

2.8

Slow warm-up

2.1

No data

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #9 in ranking

3.1

Cabin heat

3.0

Overheating

3.8

Slow warm-up

3.1

No data

Reviews

All

Wahler

OEM BMW

Wahler › Thermostat

BMWMikeM 21 Dec 2025, 19:59

Rating 5.0

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

OEM BMW › Thermostat

Valhallacomes 13 Dec 2025, 13:22

Rating 4.0

The gasket looks fine. Normal procedure would be to buy a new one from BMW. always go OEM with the thermostat, there's a lot of shit knockoffs.

Cons: shit knockoffs

OEM BMW › Thermostat

OkSheepherder1565 21 Nov 2025, 18:05

Overheating:

Rating 4.0

I recently moved on from a 2016 X3 35i (N55) with a little over 100k miles on it. The only things to break on it were the thermostat and a control board for one of the headlight modules. When I replaced the thermostat I did the water pump as a precaution.

Pros: only consumables

Cons: thermostat broke

Vehicle: BMW X3

Mileage: 160934 km

Wahler › Thermostat

mrkprsn 3 Nov 2025, 15:07

Overheating:

Rating 4.5

I had a wahler thermostat and my temp range was 93-96

Pros: stable temperature range

Vehicle: BMW

OEM BMW › Thermostat

yello_downunder 8 Jan 2026, 05:50

Overheating:

Rating 3.0

Notice the radiator is leaking. Replace that. Car still not happy, cooling fans on full blast. Codes point to a thermostat, but the radiator hoses get warm. In my pea brain thermostats don't normally just sometimes go bad, they're typically either all broke or not broke. Ordered a thermostat from Trumplandia anyways.

Cons: expensive, complex design

Vehicle: BMW

Wahler › Thermostat

TheOnlyQueso 11 Dec 2025, 02:55

Rating 2.0

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

Wahler › Thermostat

jimjoe21 3 Nov 2025, 05:59

Slow warm-up:
Cabin heat:

Rating 0.5

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

OEM BMW › Thermostat

martian_bot 18 Aug 2025, 18:27

Slow warm-up:

Rating 1.0

I bought from FCP euro one of the OE water thermostat and water pump. The thermostat sticks open since new so I get check engine light on my M54 engine.

Cons: thermostat sticks open

Wahler › Thermostat

Fiendingas 4 Jun 2025, 06:01

Rating 0.5

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

Wahler › Thermostat

Fiendingas 28 May 2025, 19:41

Rating 1.5

I have experienced same with Wahler thermostat.

Cons: same problem experienced

Vehicle: BMW

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Which thermostat to choose — Wahler or OEM BMW?

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:

Comparison of thermostat Wahler and OEM BMW

PR Score.
Overall ranking.
Vote balance.
Average rating.
Number of reviews.
Feature ratings.
Car owners’ choice.

Which thermostat are better — OEM BMW or Wahler?

In March 2026 on PartReview, thermostat OEM BMW were overall better than Wahler.

Wahler received a PR Score of 48 out of 100, and OEM BMW scored 60 points.
Wahler ranked 13 in the overall ranking, and OEM BMW ranked 9.
The average rating is higher for OEM BMW (3.1) than for Wahler (2.9).
Thermostat OEM BMW have better feature ratings than Wahler:
- Slow warm-up - owners believe, that this property for OEM BMW is better than Wahler.
- Cabin heat - drivers claim, that this property for OEM BMW is outperforms Wahler.
- Overheating - reviews suggest, that this property for OEM BMW is preferred to Wahler.

Which thermostat are more popular — Wahler or OEM BMW?

Thermostat Wahler and OEM BMW were equally popular according to data in March 2026.

By vote balance, thermostat OEM BMW surpassed Wahler:

For Wahler, the ratio of positive (41) to negative (44) votes is -3 votes.
For OEM BMW, the ratio of positive (26) to negative (17) votes is 9 votes.

By number of reviews, thermostat Wahler surpassed OEM BMW:

For thermostat Wahler there are 28 reviews: 13 positive, 1 neutral, 14 negative.
For thermostat OEM BMW there are 14 reviews: 8 positive, 1 neutral, 5 negative.

Which thermostat do car owners prefer — Wahler or OEM BMW?

In March 2026, according to PartReview, thermostat Wahler and OEM BMW 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 Wahler with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM Nissan, OEM Audi, Duralast.

Also available: comparisons of thermostat OEM BMW with: MotoRad, OEM Volkswagen, Mahle, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM Nissan, OEM Audi, 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.