How to disconnect, remove, and replace the Engine Coolant Temperature (ECT) sensor on Lexus RX350?

Be careful with the ECT sensor in four-cylinder models as it affects the fuel injection system. It's on the left end of the cylinder head. Disconnect the negative battery cable, partially drain the cooling system, disconnect the sensor's electrical connector, and unscrew it. Apply Teflon tape to the threads and ensure secure tightening during installation. In V6 models, the ECT sensor is on the water outlet casting on 3.0L and 3.3L engines, and under the air filter housing on 3.5L engines. Disconnect the negative battery cable, partially drain the cooling system, and disconnect the sensor's electrical connector. Depending on the model, unscrew the sensor or remove the retaining clip and pull out the sensor. Ensure proper tightening or full seating before reinserting the clip. Refill the cooling system to finish.

Genuine Lexus RX350 Coolant Temperature Sensor

Coolant Water Temperature Sensor

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7 Coolant Temperature Sensors found

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Lexus RX350 Sensor, Water Temperature (For E.F.I.)
Part Number: 89422-33030
$60.79 MSRP: $80.89
You Save: $20.10 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Coolant Temperature Sensor, Temperature Sensor
- Manufacturer Note: (J)
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2023-2025 Lexus RX350 | 4 Cyl 2.4L | T24AFTS; T24AFTS; TALA10L-AWZGTA, TALA10L-CWZGTA, TALA15L-CWZGTA, TALH17L-AWTGTA, TALH17L-CWTGTA
- 2007-2015 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFE, 2GRFXE; 2GRFE, 2GRFXE; GGL10L-AWTGKA, GGL10L-CWTGKA, GGL15L-AWTGKA, GGL15L-CWTGKA, GGL15L-CWZGKA, GSU30L-AWAGKA, GSU30L-CWAGKA, GSU35L-AWAGKA, GSU35L-CWAGKA, GYL10L-AWXGKA, GYL10L-CWXGKA, GYL15L-AWXGKA, GYL15L-CWXGKA
View related parts
Lexus RX350 Sensor, Water Temperature (For E.F.I.)
Part Number: 89422-35010
$60.79 MSRP: $80.89
You Save: $20.10 (25%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Coolant Temperature Sensor
- Manufacturer Note: P/N LABEL=8942235010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2007 Lexus RX350 | STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCU33L-AWAGKA, MCU33L-CWAGKA, MCU38L-AWAGKA, MCU38L-CWAGKA
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Lexus RX350 Sensor, Water Temper
Part Number: 89422-47010
$61.04 MSRP: $81.22
You Save: $20.18 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Water Temperature (For E.F.I.); Coolant Temperature Sensor, Temperature Sensor
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2016-2022 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFKS, 2GRFXS; 2GRFKS, 2GRFXS; GGL20L-CWZGBA, GGL25L-AWZGBA, GGL25L-BWZGBA, GGL25L-CWZGBA, GYL20L-CWXGBA, GYL25L-AWXGBA, GYL25L-CWXGBA
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Lexus RX350 Sensor, Water Temperature (For E.F.I.)
Part Number: 89422-06010
$63.46 MSRP: $85.81
You Save: $22.35 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Coolant Temperature Sensor, Temperature Sensor
- Manufacturer Note: (L)
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2007 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSU30L-CWAGKA, GSU35L-CWAGKA
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Lexus RX350 Sensor, Temperature
Part Number: 89429-12010
$104.02 MSRP: $140.67
You Save: $36.65 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Oil Temperature Sending Unit
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2023-2025 Lexus RX350 | 4 Cyl 2.4L | T24AFTS; T24AFTS; TALA10L-AWZGTA, TALA10L-CWZGTA, TALA15L-CWZGTA, TALH17L-AWTGTA, TALH17L-CWTGTA
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Lexus RX350 Sensor, Water Temper
Part Number: 89422-33040
$58.74 MSRP: $78.16
You Save: $19.42 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2023-2025 Lexus RX350 | 4 Cyl 2.4L, 4 Cyl 2.5L | A25AFXS, T24AFTS; A25AFXS, T24AFTS; AALH15L-AWXGBA, AALH15L-CWXGBA, AALH16L-AWXGBA, TALA10L-AWZGTA, TALA10L-CWZGTA, TALA15L-CWZGTA, TALH17L-AWTGTA, TALH17L-CWTGTA
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Lexus RX350 Switch, Temperature
Part Number: 89428-12170
$126.51 MSRP: $171.07
You Save: $44.56 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2010-2015 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFXE; 2GRFXE; GYL10L-AWXGKA, GYL10L-CWXGKA, GYL15L-AWXGKA, GYL15L-CWXGKA

Lexus RX350 Coolant Temperature Sensor

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus RX350 Coolant Temperature Sensor available on LexusPartsNow.com. Our OEM Lexus RX350 Coolant Temperature Sensor come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus RX350 Coolant Temperature Sensor Parts Questions & Experts Answers

Sensor, Water Temperature (For E.F.I.)
89422-33030
Q: How to disconnect, remove, and replace the Engine Coolant Temperature (ECT) sensor on Lexus RX350?
A: Be careful with the ECT sensor in four-cylinder models as it affects the fuel injection system. It's on the left end of the cylinder head. Disconnect the negative battery cable, partially drain the cooling system, disconnect the sensor's electrical connector, and unscrew it. Apply Teflon tape to the threads and ensure secure tightening during installation. In V6 models, the ECT sensor is on the water outlet casting on 3.0L and 3.3L engines, and under the air filter housing on 3.5L engines. Disconnect the negative battery cable, partially drain the cooling system, and disconnect the sensor's electrical connector. Depending on the model, unscrew the sensor or remove the retaining clip and pull out the sensor. Ensure proper tightening or full seating before reinserting the clip. Refill the cooling system to finish.