How to replace the thermostat on Toyota Sienna?

Removing the thermostat To take out the thermostat, drain the coolant and take off other parts of it such as the battery, air cleaner parts. Unscrew the radiator hose and unscrew the water inlet. Install a new thermostat with a gasket making sure that it is well aligned. Install everything again, pour in some coolant, and test.

OEM Toyota Sienna Thermostat

Engine Coolant Thermostat

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2 Thermostats found

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Toyota Sienna Water Inlet
Part Number: 90916-A3003
$22.69 MSRP: $31.59
You Save: $8.90 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat; Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 90916-03129, 90916-03084
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2012, 1998-2006 Toyota Sienna | 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
View related parts
Toyota Sienna Thermostat
Part Number: 90916-A3002
$24.25 MSRP: $33.74
You Save: $9.49 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 90916-A3001, 90916-03140, 90916-03133
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2007-2016 Toyota Sienna | Base, CE, L, LE, Limited, SE, XLE | 6 Cyl 3.5 L GAS

Toyota Sienna Thermostat

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Toyota Sienna Thermostat Parts and Q&A

Water Inlet
90916-A3003
Q: How to replace the thermostat on Toyota Sienna?
A: Removing the thermostat To take out the thermostat, drain the coolant and take off other parts of it such as the battery, air cleaner parts. Unscrew the radiator hose and unscrew the water inlet. Install a new thermostat with a gasket making sure that it is well aligned. Install everything again, pour in some coolant, and test.