How to Service the Coolant Temperature Sensor on Mercury Mountaineer?

As a precaution, turn off the battery ground cable and empty the cooling system before removing the Engine Coolant Temperature (ECT) Sensor. Eliminate the components in the following order as indicated in the illustration and table. To install, simply reverse the steps to uninstall and do not forget to fill and bleed the cooling system after that.

How to service the Coolant Temperature Sensor/Switch for the computer on Mercury Mountaineer?

In order to maintain the Coolant Temperature Sensor/Switch of the computer, begin by removing the battery ground cable and emptying the cooling system. Then disconnect the electrical connector to the ECT sensor, then take away the retaining clip, and the sensor. These steps can be inverted to install.

OEM Mercury Mountaineer Coolant Temperature Sensor

Coolant Water Temperature Sensor

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4 Coolant Temperature Sensors found

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Mercury Mountaineer Coolant Temperature Sensor Part Number: 3F1Z-12A648-A
$23.00 MSRP: $36.53
You Save: $13.53 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sender Assembly; Engine Coolant Temperature Sensor; Air Temperature Sensor; HVAC System Switch; Temperature Sensor; Temperature Switch; Level Sensor; Temperature Sending Unit; Temperature Gauge Sending Unit; Sensor
- Replaces: F5AZ-12A648-AB, F5AZ-12A648-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2010, 1997-2001 Mercury Mountaineer | Base, Luxury, Premier | 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
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Mercury Mountaineer Coolant Temperature Sensor Part Number: F8CZ-12A648-B
$30.10 MSRP: $47.80
You Save: $17.70 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sender Assembly; Engine Coolant Temperature Sensor; Temperature Sensor
- Replaces: F77Z-12A648-AA, F8CZ-12A648-AA, DY-824
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002-2004, 1998-2000 Mercury Mountaineer | Base, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Mountaineer Coolant Temperature Sensor Part Number: 3L8Z-12A648-A
$29.78 MSRP: $47.29
You Save: $17.51 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sender Assembly; Engine Coolant Temperature Sensor; Temperature Sensor; Temperature Switch; Sensor
- Replaces: 3L8Z-12A648-BA, DY-1004
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2010 Mercury Mountaineer | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Mountaineer Temperature Sensor Part Number: F7DZ-10884-AA
$15.63 MSRP: $25.22
You Save: $9.59 (39%)
ADD TO CART
Product Specifications
- Other Name: Sender Assembly - Temperature; Engine Coolant Temperature Sender; Cooling Fan Switch; Temp Sender Gauge; Fan Switch; Sending Unit; Temperature Sending Unit; Temperature Gauge Sending Unit
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2001 Mercury Mountaineer | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS

Mercury Mountaineer Coolant Temperature Sensor

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Mercury Mountaineer Coolant Temperature Sensor Parts and Q&A

Coolant Temperature Sensor
3L8Z-12A648-A
Q: How to Service the Coolant Temperature Sensor on Mercury Mountaineer?
A: As a precaution, turn off the battery ground cable and empty the cooling system before removing the Engine Coolant Temperature (ECT) Sensor. Eliminate the components in the following order as indicated in the illustration and table. To install, simply reverse the steps to uninstall and do not forget to fill and bleed the cooling system after that.
Coolant Temperature Sensor
F8CZ-12A648-B
Q: How to service the Coolant Temperature Sensor/Switch for the computer on Mercury Mountaineer?
A: In order to maintain the Coolant Temperature Sensor/Switch of the computer, begin by removing the battery ground cable and emptying the cooling system. Then disconnect the electrical connector to the ECT sensor, then take away the retaining clip, and the sensor. These steps can be inverted to install.