How to service the thermostat on 2003 Toyota Sienna?

Service of the thermostat, drain the engine coolant, strip off the air cleaner cap and hose and pull out the ECT switch connectors. Take out the water inlet pipe and thermostat examining the thermostat in hot water. Replacement in case of non-specifications. Install parts once again, add coolant, and see whether there is a leakage.

OEM 2003 Toyota Sienna Thermostat

Engine Coolant Thermostat

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1 Thermostat found

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2003 Toyota Sienna 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 2003 Toyota Sienna Submodels:
- Base, CE, LE, Limited, XLE, XLE Limited | 4 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS

2003 Toyota Sienna Thermostat

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2003 Toyota Sienna Thermostat Parts Q&A

Q: How to service the thermostat on 2003 Toyota Sienna?
A: Service of the thermostat, drain the engine coolant, strip off the air cleaner cap and hose and pull out the ECT switch connectors. Take out the water inlet pipe and thermostat examining the thermostat in hot water. Replacement in case of non-specifications. Install parts once again, add coolant, and see whether there is a leakage.