How to disconnect, remove, and replace the Engine Coolant Temperature (ECT) sensor in Lexus RX330 and Toyota Highlander?

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 Toyota Highlander Coolant Temperature Sensor

Coolant Water Temperature Sensor

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10 Coolant Temperature Sensors found

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Toyota Highlander Sensor, Water Temperature
Part Number: 89422-35010
- Other Name: Sensor, Water Temperature (For E.F.I.)
- Comment: (FOR E.F.I.)
$57.58 MSRP: $80.49
You Save: $22.91 (29%)

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Fits the following Vehicles:
2001-2011 Toyota Highlander | Limited, STD | 4 Cyl 2.4L, 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 2AZFE, 3MZFE; 1MZFE, 2AZFE, 3MZFE; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA, MCU20L-BWPNKA, MCU23L-BRANKA, MCU23L-BWANKA, MCU25L-BWPNKA, MCU28L-BRANKA, MCU28L-BWANKA, MHU23L-BRXNKA, MHU23L-BWXNKA, MHU28L-BRXNKA, MHU28L-BWXNKA, MHU48L-BRXMKA, MHU48L-BRXNKA
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Toyota Highlander Sensor, Water Temperature
Part Number: 89422-33030
- Other Name: Sensor, Water Temperature (For E.F.I.); Coolant Temperature Sensor, Temperature Sensor
- Comment: (FOR E.F.I.)
$57.58 MSRP: $80.49
You Save: $22.91 (29%)

Add to Cart
More Info
Fits the following Vehicles:
2003-2019 Toyota Highlander | Grande, Limited, Medium, Sport, STD | 4 Cyl 2.4L, 4 Cyl 2.7L, 6 Cyl 3.5L | 1ARFE, 2AZFE, 2GRFE, 2GRFKS, 2GRFXE, 2GRFXS; 1ARFE, 2AZFE, 2GRFE, 2GRFKS, 2GRFXE, 2GRFXS; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA, ASU40L-ARTNKA, ASU40L-BRTNKA, ASU50L-ARTNKA, GSU40L-ARAGKA, GSU40L-ARAMKA, GSU40L-ARANKA, GSU40L-ARASKA, GSU40L-BRAGKA, GSU40L-BRAMKA, GSU40L-BRANKA, GSU40L-BRASKA, GSU45L-ARAGKA, GSU45L-ARAMKA, GSU45L-ARANKA, GSU45L-ARASKA, GSU45L-BRAGKA, GSU45L-BRAMKA, GSU45L-BRANKA, GSU45L-BRASKA, GSU50L-ARTGKA, GSU50L-ARTMKA, GSU50L-ARTNKA, GSU50L-ARZGHA, GSU50L-ARZMHA, GSU50L-ARZNHA, GSU55L-ARTGKA, GSU55L-ARTMKA, GSU55L-ARTNKA, GSU55L-ARZGHA, GSU55L-ARZMHA, GSU55L-ARZNHA, GVU48L-BRXGKA, GVU48L-BRXNKA, GVU58L-ARXGHA, GVU58L-ARXGKA, GVU58L-ARXMHA, GVU58L-ARXMKA, GVU58L-ARXNHA, GVU58L-ARXNKA
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Toyota Highlander Switch, Temperature Detect
Part Number: 89428-41010
- Other Name: Switch, Temperature Detect, NO.2
$117.27 MSRP: $165.30
You Save: $48.03 (30%)

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Fits the following Vehicles:
2001-2007 Toyota Highlander | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCU20L-BWPNKA, MCU23L-BRANKA, MCU23L-BWANKA, MCU25L-BWPNKA, MCU28L-BRANKA, MCU28L-BWANKA
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Toyota Highlander Switch, Temperature Detect
Part Number: 89428-21010
- Other Name: Temperature Sensor, Temperature Switch
$129.04 MSRP: $183.46
You Save: $54.42 (30%)

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Fits the following Vehicles:
2001-2007 Toyota Highlander | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCU20L-BWPNKA, MCU23L-BRANKA, MCU23L-BWANKA, MCU25L-BWPNKA, MCU28L-BRANKA, MCU28L-BWANKA
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Toyota Highlander Sensor, Water Temperature
Part Number: 89422-33020
- Other Name: Sensor, Water Temperature (For E.F.I.); Coolant Temperature Sensor, Temperature Sensor
- Manufacturer Note: P/N LABEL=8942233020
- Comment: (FOR E.F.I.)
$63.00 MSRP: $88.81
You Save: $25.81 (30%)

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Fits the following Vehicles:
2008-2011 Toyota Highlander | Limited, STD | 6 Cyl 3.3L | 3MZFE; 3MZFE; MHU48L-BRXMKA, MHU48L-BRXNKA
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Toyota Highlander Sensor, Oil Temperature
Part Number: 89429-53010
- Other Name: Sensor, Temperature
$92.15 MSRP: $129.88
You Save: $37.73 (30%)

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Fits the following Vehicles:
2020-2022 Toyota Highlander | 6 Cyl 3.5L | 2GRFKS; 2GRFKS; GSU75L-ARZGHA, GSU75L-ARZMHA, GSU75L-ARZNHA, GSU75L-ARZSHA
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Toyota Highlander Sensor, Water Temper
Part Number: 89422-33040
- Manufacturer Note: MEXICO SPEC
$55.80 MSRP: $78.00
You Save: $22.20 (29%)

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Fits the following Vehicles:
2020-2022 Toyota Highlander | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXUH70L-ARXGHA, AXUH70L-ARXMHA, AXUH70L-ARXNHA, AXUH78L-ARXGHA, AXUH78L-ARXMHA, AXUH78L-ARXNHA
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Toyota Highlander Sensor, Water Temper
Part Number: 89422-47010
- Other Name: Sensor, Water Temperature (For E.F.I.); Coolant Temperature Sensor, Temperature Sensor
$57.82 MSRP: $80.82
You Save: $23.00 (29%)

Add to Cart
More Info
Fits the following Vehicles:
2016-2022 Toyota Highlander | 6 Cyl 3.5L | 2GRFE, 2GRFKS, 2GRFXE, 2GRFXS; 2GRFE, 2GRFKS, 2GRFXE, 2GRFXS; GSU50L-ARTGKA, GSU50L-ARTMKA, GSU50L-ARTNKA, GSU50L-ARZGHA, GSU50L-ARZMHA, GSU50L-ARZNHA, GSU55L-ARTGKA, GSU55L-ARTMKA, GSU55L-ARTNKA, GSU55L-ARZGHA, GSU55L-ARZMHA, GSU55L-ARZNHA, GSU70L-ARZGHA, GSU70L-ARZMHA, GSU70L-ARZNHA, GSU70L-ARZSHA, GSU75L-ARZGHA, GSU75L-ARZMHA, GSU75L-ARZNHA, GSU75L-ARZSHA, GVU58L-ARXGHA, GVU58L-ARXGKA, GVU58L-ARXMHA, GVU58L-ARXMKA, GVU58L-ARXNHA, GVU58L-ARXNKA
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Toyota Highlander Switch, Temperature
Part Number: 89428-12180
$104.67 MSRP: $147.54
You Save: $42.87 (30%)

Add to Cart
More Info
Fits the following Vehicles:
2020-2022 Toyota Highlander | 4 Cyl 2.5L | A25AFXS; A25AFXS; AXUH70L-ARXGHA, AXUH70L-ARXMHA, AXUH70L-ARXNHA, AXUH78L-ARXGHA, AXUH78L-ARXMHA, AXUH78L-ARXNHA
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Toyota Highlander Switch, Temperature
Part Number: 89428-12170
$117.04 MSRP: $164.98
You Save: $47.94 (30%)

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More Info
Fits the following Vehicles:
2010-2019 Toyota Highlander | Limited, STD | 6 Cyl 3.5L | 2GRFXE, 2GRFXS; 2GRFXE, 2GRFXS; GVU48L-BRXGKA, GVU48L-BRXNKA, GVU58L-ARXGHA, GVU58L-ARXGKA, GVU58L-ARXMHA, GVU58L-ARXMKA, GVU58L-ARXNHA, GVU58L-ARXNKA
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Toyota Highlander Coolant Temperature Sensor Parts Questions & Answers

Sensor, Water Temperature
89422-33020
Q: How to disconnect, remove, and replace the Engine Coolant Temperature (ECT) sensor in Lexus RX330 and Toyota Highlander?
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.