vs
Thermostat OEM BMW or OEM Mazda
I have this exact engine and installed a diesel thermostat. Previously, with the standard thermostat, the plastic timing chain guides would start to disintegrate after three years, but now I have no problem with that. The engine temperature is around 96°C.
Pros: no guide disintegration
Cons: guides disintegrated (standard)
Vehicle:
BMW
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
Thermostat is an bmw part so its fine
Pros: fine performance
03’ E46 318ci with 130k miles and no issues with the whole cooling system. Neither the thermostat.
Pros: no issues, long lifespan
Vehicle:
BMW
Mileage: 209215 km
I was instructed by a friend who had some of m47 and m57, to buy thermostat only original from bmw, because everything else doesn't work as long or good.
Pros: works long and good
Cons: other brands don't work
Vehicle:
BMW
Always buy the Mazda OEM branded thermostat from any local or online Mazda factory parts retailer, this is not the item you want to save a couple bucks on, no matter how much you trust that ‘other’ brand.
Pros: reliable, quality
Vehicle:
Mazda
They kept it for another day and were obviously able to replicate the fault and replaced the Thermostat as they thought it was sticking causing the Temps to fluctuate.
Pros: Thermostat replaced
Cons: sticking, causing fluctuation
Vehicle:
Mazda
Mileage: 89000 km
Thermostat failed multiple times
Cons: failed multiple times
Vehicle:
Mazda 3
I just had the code P0126 on my 2021 mazda cx-30 with 20,000 miles. Seems to be the same issue
Cons: code P0126
Vehicle:
Mazda
Mileage: 20000 km
I replaced the t-stat with a genuine part and again no luck.
Cons: did not fix issue
Vehicle:
BMW
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