Preparations:
Park the vehicle on a level surface and engage the parking brake.
Turn off the engine and allow it to cool down.
Gather necessary tools and equipment, including a new speed sensor, socket wrench set, flat head screwdriver, and flashlight.
Locate the Speed Sensor:
Open the hood of the Xterra.
Locate the speed sensor on the transmission housing near the transmission and transfer case
The sensor is usually cylindrical and has a wiring connector attached to it.
Disconnect the Speed Sensor:
Locate the electrical connector attached to the speed sensor.
Press down on the release tab on the connector and disconnect it by gently pulling the connector straight off.
Remove the Speed Sensor:
Use a flat head screwdriver to gently pry out the rubber seal around the speed sensor.
Use a socket wrench to loosen and remove the bolt holding the speed sensor in place.
Gently pull out the old speed sensor from its housing.
Install the New Speed Sensor:
Compare the old and new speed sensors to make sure they are identical.
Insert the new speed sensor into its housing and reinstall the bolt. Tighten the bolt securely but do not over-tighten.
Reinstall the rubber seal around the sensor and ensure that it is seated properly.
Reconnect the Electrical Connector:
Reconnect the electrical connector to the new speed sensor. Ensure that the connector is fully seated and the release tab is engaged.
Testing:
Start the Xterra and let it run for a few minutes.
Take the vehicle for a short test drive to verify that the speedometer is functioning correctly.
Note: In some cases, the vehicle's computer may need to be reset after replacing the speed sensor. Consult the vehicle's service manual or a qualified mechanic if necessary.
