Owner reviews for thermostat

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325

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Slow warm-up

OEM Nissan

5.0

Cabin heat

MOPAR

5.0

Overheating

OEM Subaru

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OEM Volkswagen: Thermostat

Thermostat Wahler or MotoRad

Thermostat OEM Volkswagen or MotoRad

Thermostat Mahle or MotoRad

Thermostat OEM Mazda or MotoRad

Thermostat MOPAR or MotoRad

Thermostat MISHIMOTO or MotoRad

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OEM Mazda › Thermostat

SlowDownToGoDown 27 Jul 2025, 22:38

Rating 5.0

Slow warm-up:

I had the same issue on my 09 Mazda 2.3L. Everything looked good on the dash, but the thermostat let too much coolant through, over cooling the engine. My CEL came on, I reset it, and it reappeared. Long drives on the freeway in cool weather was the scenario that triggered it, as the radiator is very effective at speed, and the engine isn't working hard cruising on level ground at freeway speeds. I bought the thermostat "cover" (it's the plastic assembly with the thermostat integrated in it-- PN LF70-15-170) for $57 from Amazon and installed it last November and the CEL has not reappeared.

Pros: CEL disappeared, engine cooling fixed

Part number: LF70-15-170

OEM Honda › Thermostat

Perfect-Leather-2209 26 Jul 2025, 15:05

Rating 5.0

Overheating:

After getting a P0128 code and replacing the Tstat with an OEM equivalent from a parts house and my code coming back and then actually buying the OEM straight from the dealer fixing my code, I’m hesitant on what I should really put in my car since it seems to be sensitive to parts as well. I remember buying Tstats from AutoZone and never being a problem before.

Pros: Fixed P0128 code

Vehicle: Honda Civic

OEM Subaru › Thermostat

Demache 24 Jul 2025, 16:00

Rating 5.0

Slow warm-up:
Overheating:

I will save you the effort that if you DIY, just go to a dealer or whoever sells OEM parts and get the Subaru thermostat. Aftermarket ones are hit and miss and the OEM ones aren't that expensive anyway, its like 30 bucks for a thermostat and gasket.

Pros: OEM good value

Cons: Aftermarket hit and miss

Vehicle: Subaru Outback

MISHIMOTO › Thermostat

Next-Background-5812 17 Jul 2025, 20:17

Rating 5.0

Slow warm-up:
Overheating:

Mishimoto has a great thermostat plus it has a lifetime warranty

Pros: great thermostat, lifetime warranty

MOPAR › Thermostat

Flowermomi 17 Jul 2025, 13:27

Rating 5.0

Slow warm-up:
Overheating:

I had the same issue and throwing a bad thermostat error code. I had the thermostat replaced and it kept happening. He said the thermostats out there are crap and they’ve had to change some 3 times. He did recommend getting a Mopar thermostat if I could. It was replaced and I’ve had no issues.

Pros: no issues

Cons: kept happening, thermostats are crap

Vehicle: Jeep

MOPAR › Thermostat

Emergency_Ad7766 17 Jul 2025, 12:55

Rating 5.0

Slow warm-up:
Overheating:

The OE version is the only one that works. Knock off t-stats will generally last a few weeks to a few months. The OE thermostat has been updated, pops at 203 degrees and lasts much longer than anything else. An OE thermostat seems to fail open. Whereas the knock-offs fail shut.

Pros: lasts much longer, fails open

Cons: last a few weeks, fail shut

Vehicle: Jeep Wrangler

OEM Mazda › Thermostat

Used-Phone5715 10 Nov 2025, 23:57

Rating 3.0

Slow warm-up:

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