How to replace and check the coolant temperature sending unit?

The coolant temperature indicator system includes a dashboard gauge and a sending unit on the engine. The unit's location varies depending on the engine model. Some vehicles have multiple units, but only one is used for the indicator system. On 2005 and later Expedition/Navigator 5.4L engines, a cylinder head temperature sensor is used. If overheating is indicated, check the coolant level, wiring, and fuses. To test the sender, disconnect the connector and attach a jumper wire. If the gauge doesn't swing to full hot, there may be a circuit issue. If the gauge works during testing but not when hot, replace the unit. Prepare the new unit with Teflon tape or sealer. For 2005 and later models, the intake manifold must be removed to access the CHT. Disconnect the connector and unscrew the sensor to replace it. Install quickly to minimize coolant loss and check the coolant level after installation.

Genuine Ford Expedition Coolant Temperature Sensor

Coolant Water Temperature Sensor

Enter your vehicle info to find more parts and verify fitment

Select Vehicle by VIN
Select Vehicle by Model

Select by VIN

Enter your VIN for the most accurate results.

Select by Model

-- Select Make --

-- Select Model --

-- Select Year --

5 Coolant Temperature Sensors found

View related parts
Ford Expedition Sender Assembly
Part Number: F2AZ-12A648-A
- Other Name: Sender Assy
- Replaced by: 9U2Z-12A648-A
$35.68 MSRP: $56.91
You Save: $21.23 (38%)

Add to Cart
More Info
Fits the following Vehicles:
1997-2002 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 5.4L | 4AT 4R100, 4AT 4R70W, 4AT E4OD
Less Info
View related parts
Ford Expedition Sender Assembly - Temperature
Part Number: F65Z-10884-AA
- Other Name: Sender Assy - Temperature; Temperature Sending Unit
$104.50 MSRP: $172.73
You Save: $68.23 (40%)

Add to Cart
More Info
Fits the following Vehicles:
1997-2002 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 5.4L | 4AT 4R100, 4AT 4R70W, 4AT E4OD
Less Info
View related parts
Ford Expedition Sender Assembly
Part Number: 4L3Z-12A648-AB
- Other Name: Sender Assy; Coolant Temperature Sensor, Temperature Sensor
- Replaces: DY-981, 4L3Z-12A648-AA
$54.34 MSRP: $89.82
You Save: $35.48 (40%)

Add to Cart
More Info
Fits the following Vehicles:
2005-2014 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
Less Info
View related parts
Ford Expedition Actuator - Temperature Control
Part Number: JL3Z-10884-A
- Other Name: Actuator, Actuator Assembly
- Position: Upper
$71.82 MSRP: $105.00
You Save: $33.18 (32%)

Add to Cart
More Info
Fits the following Vehicles:
2018-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
Less Info
View related parts
Ford Expedition Sensor - Engine Temperature, ECT
Part Number: F5AZ-12A648-A
- Replaced by: 3F1Z-12A648-A
$25.76 MSRP: $41.09
You Save: $15.33 (38%)

Add to Cart
More Info
Fits the following Vehicles:
1997-2002 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 5.4L | 4AT 4R100, 4AT 4R70W, 4AT E4OD
Less Info

Ford Expedition Coolant Temperature Sensor Parts Questions & Answers

Sender Assembly
4L3Z-12A648-AB
Q: How to replace and check the coolant temperature sending unit?
A: The coolant temperature indicator system includes a dashboard gauge and a sending unit on the engine. The unit's location varies depending on the engine model. Some vehicles have multiple units, but only one is used for the indicator system. On 2005 and later Expedition/Navigator 5.4L engines, a cylinder head temperature sensor is used. If overheating is indicated, check the coolant level, wiring, and fuses. To test the sender, disconnect the connector and attach a jumper wire. If the gauge doesn't swing to full hot, there may be a circuit issue. If the gauge works during testing but not when hot, replace the unit. Prepare the new unit with Teflon tape or sealer. For 2005 and later models, the intake manifold must be removed to access the CHT. Disconnect the connector and unscrew the sensor to replace it. Install quickly to minimize coolant loss and check the coolant level after installation.