Thermostat Mahle or OEM Mazda

PartReview Score

Rank #12 in ranking

3.1

Cabin heat

1.5

Overheating

3.3

Slow warm-up

2.2

Owners' choice:

Jeep Grand Cherokee

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #11 in ranking

3.1

Cabin heat

2.0

Overheating

3.3

Slow warm-up

2.3

No data

Reviews

All

Mahle

OEM Mazda

Mahle › Thermostat

Then-Cash-7226 12 Jan 2026, 23:29

Slow warm-up:

Rating 5.0

I’ve installed Borg Wagner thermostats and those always failed until I installed a Mahle one which never failed. For some reason any other brand will get stuck open and the engine will never get up to temp.

Pros: Mahle never failed

Cons: Borg Wagner always failed

OEM Mazda › Thermostat

whofladanger 23 Dec 2025, 00:29

Rating 4.0

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

Mahle › Thermostat

kemosabe6296 22 Dec 2025, 06:08

Slow warm-up:

Rating 4.0

I used Mahle, but I got lucky I got the German-made one (afaik now most are made in Italy). It was NOS so I expect the electrical heater (to open early) to be defect. It's been 3 years without issue though.

Pros: three years without issue

Cons: heater may be defect

Mahle › Thermostat

zoubz13 13 Jan 2026, 03:21

Overheating:

Rating 3.0

I had a brand new mahle one with the connector wired in reverse for constant. Kept blowing a fuse. Returned it for a replacement and worked fine.

Pros: worked fine after replacement

Cons: connector wired in reverse

Mahle › Thermostat

chrome1453 5 Dec 2025, 22:49

Rating 3.0

Mahle is an OEM supplier and is on stock in Amazon.

Pros: OEM supplier, in stock

Mahle › Thermostat

Ill_Slice_7084 1 Dec 2025, 01:00

Slow warm-up:
Cabin heat:

Rating 3.0

Thermostat and temp sensor were just replaced with OE Mahle/Behr. P0128 showed up after car didn’t get up to temp. Heat is slightly affected until reaches operating temp.

Cons: car didn’t get up to temp

Vehicle: BMW

OEM Mazda › Thermostat

Actual_Muffin_1157 27 Jan 2026, 05:20

Cabin heat:

Rating 2.0

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

OEM Mazda › Thermostat

Right_Illustrator_10 26 Jan 2026, 22:49

Overheating:

Rating 2.0

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

OEM Mazda › Thermostat

MathematicianRude809 26 Jan 2026, 21:16

Slow warm-up:
Cabin heat:

Rating 1.0

I replace thermostat even the whole block. Same issue. This fucking car don’t heat.

Cons: car doesn't heat, same issue

Vehicle: Mazda

OEM Mazda › Thermostat

Disco-Rollercoaster 4 Dec 2025, 20:18

Overheating:

Rating 1.0

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

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Which thermostat to choose — Mahle 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:

Comparison of thermostat Mahle and OEM Mazda

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

Which thermostat are better — OEM Mazda or Mahle?

In March 2026 on PartReview, thermostat OEM Mazda and Mahle were roughly equal.

Mahle received a PR Score of 54 out of 100, and OEM Mazda scored 54 points.
Mahle ranked 12 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 — Mahle or OEM Mazda?

In March 2026 on PartReview, thermostat OEM Mazda were overall more popular than OEM Mazda.

The brands are equal by vote balance:

For Mahle, the ratio of positive (37) to negative (31) votes is 6 votes.
For OEM Mazda, the ratio of positive (35) to negative (29) votes is 6 votes.

By number of reviews, thermostat Mahle surpassed OEM Mazda:

For thermostat Mahle there are 21 review: 9 positive, 5 neutral, 7 negative.
For thermostat OEM Mazda there are 20 reviews: 9 positive, 4 neutral, 7 negative.

Which thermostat do car owners prefer — Mahle or OEM Mazda?

In March 2026, according to PartReview, thermostat Mahle led more car-specific ratings than OEM Mazda:

Mahle are chosen by owners of cars such as: Jeep Grand Cherokee, and others.

Thermostat OEM Mazda have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.

Other comparisons of thermostat

If this comparison didn’t fully answer your question, there are many others on PartReview.

For example, comparisons of thermostat Mahle with: MotoRad, Wahler, OEM Volkswagen, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Audi, Duralast.

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