Genuine 1990 Mazda 323 Radiator

1990 Mazda 323 Radiator Parts and Q&A

• Q: How to replace the coolant temperature sensors and radiator thermoswitch on 1990 Mazda 323?

  A: Those models produced between 1990 and 1994 have two cooling fan thermoswitches with those made after 1995 having the PCM control the cooling fan relay. The main thermoswitch can be replaced by removing the cooling system, removing the connector and installing a new switch. In the case of the secondary switch, take out the resonance chamber and repeat. Rebuild the cooling system then.