How to check and replace the engine coolant temperature (ECT) sensor on Lexus ES300?

To start with, the Coolant Temperature Sensor uses a thermistor that adjusts its resistance based on temperature changes. This resistance variation directly affects the voltage signal sent from the sensor to the PCM. Problems with the ECT sensor circuits will trigger a diagnostic trouble code. To check the ECT sensor, detach the electrical connector and measure the resistance between the sensor's terminals using an ohmmeter. The resistance should be between 2,500 and 3,000 ohms at room temperature. When the sensor is warmed in water, the resistance should decrease to around 250 to 300 ohms at 180 degrees F. If the test results are incorrect, you will need to replace the ECT sensor. Then replace the sensor, drain about one gallon of coolant, wrap the threads of the new sensor with Teflon sealing tape, disconnect the electrical connector, and detach the old sensor. After that, the installation is the reverse step of the removal process. Finally, you can refill the cooling system.

Genuine Lexus ES300 Coolant Temperature Sensor

Coolant Water Temperature Sensor

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11 Coolant Temperature Sensors found

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Lexus ES300 Sensor, Water Temperature (For E.F.I.)
Part Number: 89422-20010
$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
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 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:
- 1993-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, MCV20L-BTPGKA, MCV20L-BTPGKK, MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Gage Assy, Water Temperature Sender
Part Number: 83420-20040
$36.81 MSRP: $48.98
You Save: $12.17 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Temperature Sending Unit
- Manufacturer Note: (J)
- Replaces: 83420-16050, 83420-AA010
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1993-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV10L-BTPGKA, 1MZFE; MCV20L-BTPGKA, MCV10L-BTPGKK, MCV20L-BTPGKA, MCV20L-BTPGKK
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Lexus ES300 Switch, Temperature Detect
Part Number: 89428-41010
$125.75 MSRP: $171.45
You Save: $45.70 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK, MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Gage Assy, Water Temperature Sender
Part Number: 83420-16020
$36.61 MSRP: $48.73
You Save: $12.12 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Gage Assy, Water Temperature Sender
Part Number: 83420-16050
$38.29 MSRP: $48.98
You Save: $10.69 (22%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 83420-20040
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1993-1995 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK
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Lexus ES300 Switch, Temperature Detect, NO.2
Part Number: 89428-33020
$135.21 MSRP: $184.35
You Save: $49.14 (27%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Gage Assy, Water Temperature Sender
Part Number: 83420-16030
$38.91 MSRP: $49.78
You Save: $10.87 (22%)
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:
- 1993-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK
View related parts
Lexus ES300 Switch, Temperature
Part Number: 89428-21010
$139.30 MSRP: $189.92
You Save: $50.62 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch, Temperature Detect, NO.2; Temperature Switch
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2002-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; 1MZFE, 3MZFE; MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Gage Assy, Water Temperature Sender
Part Number: 83420-AA010
$38.29 MSRP: $48.98
You Save: $10.69 (22%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit
- Manufacturer Note: (L)
- Replaced by: 83420-20040
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2000-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Thermistor Assy
Part Number: 88790-33010
Product Specifications
- Other Name: Switch, Water Temperature; Temperature Switch
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE, 3VZFE; 1MZFE, 3VZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK

Lexus ES300 Coolant Temperature Sensor

Lexus ES300 Coolant Temperature Sensor is one of critical parts to show the quality and performance of Lexus vehicles. This sensor more or less monitors the coolant temperature to make sure that the engine of the ES300 runs efficiently and this is vital in the longevity and excellent performance of the vehicle. The Coolant Temperature Sensor is available in range of ES300 models; it improves both efficiency and safety by sending data on coolant temperature to the engine management system. This functionality plays an important role in avoiding the over heating of the engine and therefore, protecting the engine while enhancing on the performance of the vehicle as a whole. The magnificent Lexus ES300 that enjoys features such as luxury and a smooth ride especially owes the efficiency of this component called Coolant Temperature Sensor as one of the factors that enhance the dependability of the car. It is important to mention that the sensor is designed to blend into the FR-Specific layout of the ES300 and its overall structure reflecting the brand's specifications of Lexus vehicles. Further, out of all competitors in the automotive market, the Coolant Temperature Sensor has the proper build quality and is nonflammable in various driving conditions. This is why choosing the Lexus ES300 Coolant Temperature Sensor would provide drivers with the comfort of knowing that their vehicle is fitted with a part that will work to offer as much improvement to both the vehicle's efficiency and safety as possible, cementing the Lexus ES300 as an exemplary luxury sedan.

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus ES300 Coolant Temperature Sensor available on LexusPartsNow.com. Our OEM Lexus ES300 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 ES300 Coolant Temperature Sensor Parts Questions & Experts Answers

Sensor, Water Temperature (For E.F.I.)
89422-35010
Q: How to check and replace the engine coolant temperature (ECT) sensor on Lexus ES300?
A: To start with, the Coolant Temperature Sensor uses a thermistor that adjusts its resistance based on temperature changes. This resistance variation directly affects the voltage signal sent from the sensor to the PCM. Problems with the ECT sensor circuits will trigger a diagnostic trouble code. To check the ECT sensor, detach the electrical connector and measure the resistance between the sensor's terminals using an ohmmeter. The resistance should be between 2,500 and 3,000 ohms at room temperature. When the sensor is warmed in water, the resistance should decrease to around 250 to 300 ohms at 180 degrees F. If the test results are incorrect, you will need to replace the ECT sensor. Then replace the sensor, drain about one gallon of coolant, wrap the threads of the new sensor with Teflon sealing tape, disconnect the electrical connector, and detach the old sensor. After that, the installation is the reverse step of the removal process. Finally, you can refill the cooling system.

Related Lexus ES300 Parts

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2003 Coolant Temperature Sensor 2002 Coolant Temperature Sensor 2001 Coolant Temperature Sensor 2000 Coolant Temperature Sensor 1999 Coolant Temperature Sensor 1998 Coolant Temperature Sensor 1997 Coolant Temperature Sensor 1996 Coolant Temperature Sensor 1995 Coolant Temperature Sensor 1994 Coolant Temperature Sensor 1993 Coolant Temperature Sensor 1992 Coolant Temperature Sensor