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Review on Mazda BP6F 15 171A Engine Coolant Thermostat by Todd Phillips

Revainrating 5 out of 5

Made in Japan OE Quality

I bought an AC Delco 192 thermostat for my Miata but it keeps overheating. I'm pretty sure the AC Delco thermostat is fine, but I replaced it with a factory thermostat that costs over three times the AC Delco. Let's see if this thermostat helps once I've finished building my Miata. The Houston heat will certainly be an issue. This thermostat is a true OE and made in Japan just like the Miata it comes with.

Pros
  • Weight
Cons
  • Good but not great