Genuine Toyota Thermostat & Housing

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What are Toyota Thermostat & Housing?

A Toyota thermostat is a factory-calibrated, wax-pellet valve that regulates coolant flow between the engine block and the radiator.

The thermostat housing (or water outlet) is the aluminium or high-temperature composite cover that anchors the thermostat, incorporates coolant bleed passages and provides sealed ports for radiator, heater and bypass hoses.

When to Replace the Thermostat

Change the thermostat whenever one of the following conditions is met:

  • Service Schedule: Toyota recommends inspection at 60,000 km and replacement at 100,000 km on most petrol engines; 150,000 km on later low-restriction designs.
  • Overheating or Fluctuating Gauge: Thermostat stuck closed or opening too late.
  • Permanent Low Temperature: Stuck open – poor fuel economy, sludge build-up, failed emissions test.
  • Coolant Leak from Housing: Cracked plastic or warped aluminium sealing face.

It is recommended to fit a genuine Toyota thermostat & housing. Exact valve stroke maintains factory flow rate, integrated bleed nipple prevents air locks, and the matching gasket is tailored for your block surface—avoiding comebacks and costly engine damage.

Explore Our Range – Genuine Toyota Thermostat & Housing

Nunawading Toyota Parts stocks complete thermostat assemblies, housing covers and sealing gaskets for every major Toyota model including Camry, Corolla, Yaris, RAV4, and more.

Can’t see your thermostat online? Email or phone our parts team with your VIN or registration—we can locate and express-dispatch any Toyota thermostat or housing nationwide.