I just bought two thermostat related parts off rockauto that are both Aisin yesterday.
Owner reviews for thermostat
Manufacturers
Comparisons
I have Mitsubishi multi splits and they run 20 hours a day at the lowest setting, temp is always within one degree. Have your HVAC guy set the temperature delta on the thermostats.
Pros: temp always within one degree
OEM Nissan, but slightly more conservative with cooling.
Pros: conservative cooling
Vehicle:
Nissan
I have installed them in two rebuilt, and they are working perfectly fine
Pros: perfectly fine operation
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
My '83 Mighty Max with 783,000+ miles on its original engine, thermostat included, would like a word. I'm pretty sure it will outlast me if I can stay ahead of the rust.
Pros: extremely long lifespan, original part
Vehicle:
Mitsubishi
Mileage: 1260110 km
My 2021 Mazda3 Turbo has classic thermostat failure symptoms: \n\n- Erratic warm-up (sometimes stuck cold, sometimes near overheating). \n- Upper radiator hose stays lukewarm even after 20+ mins of driving (revved to 3K RPM to test). \n- Housing burns hot, but hose never gets scalding\u2014clear sign of a stuck thermostat.
Pros: erratic warm-up, stuck thermostat
Cons: sometimes near overheating
Vehicle:
Mazda
Part number: PX4J-15-170
I put the mishimoto 160* in hot water to test it out. Lo and behold, wax started seeping out.
Cons: wax seeping out, failed test
I had 2 fail back to back. The first lasted 3 months, a couple thousand miles, the 2nd lasted 5 weeks, also a couple thousand miles. Left me stranded. 275 degree spike followed by coolant puking.
Cons: failed quickly, left stranded, coolant puking
Mileage: 3218 km
Thermostat failed multiple times
Cons: failed multiple times
Vehicle:
Mazda 3
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