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Spare parts reviews ➔ All comparisons ➔ OEM Audi ➔ Mahle

Thermostat OEM Audi or Mahle

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OEM Audi
Mahle
Mahle › Thermostat
Then-Cash-7226
  • 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
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Mahle › Thermostat
kemosabe6296
  • 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
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OEM Audi › Thermostat
_pbentley
Rating 4.0

I have an 06 Audi A3 2.0T Sportback with just over 105k miles; recently replaced the thermostat, spark plugs and coil packs. Other than being in need of some new brakes and a bit of cosmetic love, she's running strong.

Pros: running strong
Cons: needs new brakes
Vehicle: Audi A3
Mileage: 168981 km
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Mahle › Thermostat
zoubz13
  • 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
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OEM Audi › Thermostat
First-Taro-8760
  • Overheating:
Rating 3.0

Recently had the exact same issue on a 14 a6 ended up being a DOA t stat I compared the shaft length on the new t start to the 2nd new t stay and sure enough it protruded out about a mm further just enough to not seal properly causing the over cooling after the swap no more issues.

Pros: no more issues
Cons: over cooling
Vehicle: Audi A6
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Mahle › Thermostat
Olafmihe
  • Overheating:
Rating 1.0

Hatte auch schon ein Mahle Thermostat das kurz nach eimbau defekt war. Dannach ein Originales von BMW rein und seit dem wi3der keine Probleme.

Cons: kurz nach eimbau defekt
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Mahle › Thermostat
Sharp_Carry_537
  • Overheating:
Rating 2.0

Last week changed the thermostat on my 1.9 tdi 66kW to a Mahle TX 15 87D (11€), it was fine for the first two days, then the temps started dropping again.

Pros: fine for first two days
Cons: temps dropping again
Part number: TX 15 87D
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Mahle › Thermostat
PsEuDoAnOnYmOuS47
  • Slow warm-up:
  • Overheating:
  • Cabin heat:
Rating 1.0

1st Mahle. The engine only reaches up to 65 degrees and it drops further if I drive under 2000RPMs on highway for example or turn on the heating.

Cons: engine underheats, temperature drops
Vehicle: BMW
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Which thermostat to choose — OEM Audi or Mahle?

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 OEM Audi and Mahle
  1. PR Score.
  2. Overall ranking.
  3. Vote balance.
  4. Average rating.
  5. Number of reviews.
  6. Feature ratings.
  7. Car owners’ choice.

Which thermostat are better — Mahle or OEM Audi?

In March 2026 on PartReview, thermostat OEM Audi were overall better than Mahle.

  1. OEM Audi received a PR Score of 75 out of 100, and Mahle scored 54 points.
  2. OEM Audi ranked 7 in the overall ranking, and Mahle ranked 12.
  3. The average rating is higher for OEM Audi (4) than for Mahle (3.1).
  4. Thermostat OEM Audi have better feature ratings than Mahle:
    • Overheating - owners believe, that this property for OEM Audi is better than Mahle.
    • Cabin heat - drivers claim, that this property for Mahle is outperforms OEM Audi.
    • Slow warm-up - reviews suggest, that this property for Mahle is preferred to OEM Audi.

Which thermostat are more popular — OEM Audi or Mahle?

Thermostat OEM Audi and Mahle were equally popular according to data in March 2026.

By vote balance, thermostat OEM Audi surpassed Mahle:

  • For OEM Audi, the ratio of positive (27) to negative (9) votes is 18 votes.
  • For Mahle, the ratio of positive (37) to negative (31) votes is 6 votes.

By number of reviews, thermostat Mahle surpassed OEM Audi:

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

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

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

Thermostat OEM Audi 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 OEM Audi with: MotoRad, Wahler, OEM Volkswagen, OEM Mazda, MOPAR, MISHIMOTO, Gates, OEM BMW, OEM Nissan, OEM Honda.

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

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