How to replace and check the coolant temperature sending unit on Lincoln Navigator?

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 Lincoln Navigator Coolant Temperature Sensor

Coolant Water Temperature Sensor

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7 Coolant Temperature Sensors found

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Lincoln Navigator Sender Assembly - Temperature
Part Number: F65Z-10884-AA
$104.50 MSRP: $172.73
You Save: $68.23 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sender Assy - Temperature; Temperature Sending Unit
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002 Lincoln Navigator | 8 Cyl 5.4L | 4AT 4R100
- 1998-1999 Lincoln Navigator | 8 Cyl 5.4L | 4AT 4R100, 4AT E4OD
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Lincoln Navigator Sender Assembly
Part Number: F2AZ-12A648-A
$35.68 MSRP: $56.91
You Save: $21.23 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sender Assy
- Replaced by: 9U2Z-12A648-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2002 Lincoln Navigator | 8 Cyl 5.4L | 4AT 4R100, 4AT E4OD
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Lincoln Navigator Sender Assembly
Part Number: F5AZ-12A648-AB
$25.76 MSRP: $41.09
You Save: $15.33 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sender Assy
- Replaced by: 3F1Z-12A648-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Lincoln Navigator | 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Sender Assembly
Part Number: 4L3Z-12A648-AB
$45.20 MSRP: $89.82
You Save: $44.62 (50%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sender Assy; Coolant Temperature Sensor, Temperature Sensor
- Replaces: 4L3Z-12A648-AA, DY-981
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2014 Lincoln Navigator | 8 Cyl 5.4L | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Actuator - Temperature Control
Part Number: JL3Z-10884-A
$107.73 MSRP: $157.50
You Save: $49.77 (32%)
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Product Specifications
- Other Name: Actuator, Actuator Assembly
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2024 Lincoln Navigator | 6 Cyl 3.5 L GAS, 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)
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Lincoln Navigator Sensor - Engine Temperature, ECT
Part Number: F5AZ-12A648-A
$25.76 MSRP: $41.09
You Save: $15.33 (38%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: 3F1Z-12A648-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2002 Lincoln Navigator | 8 Cyl 5.4L | 4AT 4R100, 4AT E4OD
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Lincoln Navigator SENSOR - ENGINE COOLANT TEMPER
Part Number: KA1Z-9U498-A
$26.56 MSRP: $48.30
You Save: $21.74 (46%)
Ships in 1-3 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2023 Lincoln Navigator | 6 Cyl 3.5 L GAS

Lincoln Navigator Coolant Temperature Sensor Parts Questions & Experts Answers

Sender Assembly
F2AZ-12A648-A
Q: How to replace and check the coolant temperature sending unit on Lincoln Navigator?
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.