vs
Thermostat OEM BMW or OEM Mazda
I narrowed it down to a bad thermostat and bad radiator. I ordered the OEM Mazda parts for $450.00
Pros: OEM parts
Cons: bad thermostat
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
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
Some of the newer Mazda Skyactives have thermostat issues, but it's a minor problem (only symptom is taking longer to warm up) and Mazda extended the warranty on them. It's the only issue I've brought the car to the dealer for on my 21 Mazda 3 without roughly 50k on it.
Pros: minor problem, extended warranty
Cons: thermostat issues
Vehicle:
Mazda
Mileage: 50000 km
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
I have the ‘19 CX-5, live in NH. Seems normal to me, when it’s below zero outside and the at idle, it should not be hot. Warm after 5-10 yes, but not warm as it would be after driving for 10 minutes.
Pros: Warm after 5-10
Cons: not hot at idle
Vehicle:
Mazda
Batteries crap and so is the thermostat / heat and the trim on the steering wheel and gear shifter is thin and cheap and will come off everything else. Car is great
Pros: car is great (overall)
Cons: crap battery, cheap thermostat, trim comes off
Vehicle:
Mazda
I just got this fixed at the dealer on my 21. Its the thermostat. They put in over a million bad ones and don't want to own it with a recall so they sent out a TSB. There's also an extended warranty for all the cars for this part/labor.
Pros: fixed at dealer, extended warranty
Cons: defective part, no recall
Vehicle:
Mazda
I replace thermostat even the whole block. Same issue. This fucking car don’t heat.
Cons: car doesn't heat, same issue
Vehicle:
Mazda
That's due to their faulty thermostat for which they don't want to assume responsibility and call it what it is - a recall.
Cons: faulty thermostat
Write your review
Help others - share your experience with this part.
Comparisons
Show all
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads OEM Alfa Romeo got the first review!
The brake caliper OEM BMW got the first review!
The brake pads OEM Infiniti got the first review!
For wiper blades PIAA already 100 reviews.
For battery Energizer already 25 reviews.
In the rating best water pump already 12 brands participate!
In the rating best timing belt already 13 brands participate!
In the rating best head gasket already 3 brands participate!
In the auto rating oil filter for Volkswagen Passat already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating tires for Subaru Outback already 50 brands participate!
For cabin filter Fram already 25 reviews.
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
Which thermostat to choose — OEM BMW or OEM Mazda?
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 — OEM Mazda or OEM BMW?
In March 2026 on PartReview, thermostat OEM BMW were overall better than OEM Mazda.
- OEM BMW received a PR Score of 60 out of 100, and OEM Mazda scored 54 points.
- OEM BMW ranked 9 in the overall ranking, and OEM Mazda ranked 11.
- The average rating is higher for OEM Mazda (3.1) than for OEM Mazda (3.1).
Which thermostat are more popular — OEM BMW or OEM Mazda?
Thermostat OEM BMW and OEM Mazda were equally popular according to data in March 2026.
By vote balance, thermostat OEM BMW surpassed OEM Mazda:
- For OEM BMW, the ratio of positive (26) to negative (17) votes is 9 votes.
- For OEM Mazda, the ratio of positive (35) to negative (29) votes is 6 votes.
By number of reviews, thermostat OEM Mazda surpassed OEM BMW:
- For thermostat OEM BMW there are 14 reviews: 8 positive, 1 neutral, 5 negative.
- For thermostat OEM Mazda there are 20 reviews: 9 positive, 4 neutral, 7 negative.
Which thermostat do car owners prefer — OEM BMW or OEM Mazda?
In March 2026, according to PartReview, thermostat OEM BMW and OEM Mazda 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 BMW with: MotoRad, Wahler, OEM Volkswagen, Mahle, MOPAR, MISHIMOTO, Gates, OEM Nissan, OEM Audi, Duralast.
Also available: comparisons of thermostat OEM Mazda with: MotoRad, Wahler, OEM Volkswagen, Mahle, 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.