How to service the thermostat on 2004 Toyota MR2 Spyder?

Maintenance includes service of the thermostat, drainage of the coolant, and replacement of the drive belt, generator and disconnection of the water inlet. Test the thermostat in hot water; change it when it fails to open at 80-84°C or when it fails to satisfy valve lift requirements. Install a new gasket, making sure it fits correctly, rinoculate coolant and seal leaks.

OEM 2004 Toyota MR2 Spyder Thermostat

Engine Coolant Thermostat

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2004 Toyota MR2 Spyder Water Inlet
Part Number: 90916-A3003
$22.69 MSRP: $31.59
You Save: $8.90 (29%)
Product Specifications
- Other Name: Thermostat; Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 90916-03129, 90916-03084
- Part Name Code: 16331A
- Item Weight: 0.70 Pounds
- Item Dimensions: 2.3 x 0.9 x 2.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 90916-A3003
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2004 Toyota MR2 Spyder Submodels:
- Base | 4 Cyl 1.8 L GAS

2004 Toyota MR2 Spyder Thermostat

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2004 Toyota MR2 Spyder Thermostat Parts Q&A

Q: How to service the thermostat on 2004 Toyota MR2 Spyder?
A: Maintenance includes service of the thermostat, drainage of the coolant, and replacement of the drive belt, generator and disconnection of the water inlet. Test the thermostat in hot water; change it when it fails to open at 80-84°C or when it fails to satisfy valve lift requirements. Install a new gasket, making sure it fits correctly, rinoculate coolant and seal leaks.