1. Gather the necessary tools and parts.
- New speed sensor
- Socket set
- Wrench set
- Screwdriver
- Pliers
- Jack and jack stands
2. Prepare your vehicle.
- Park your vehicle on a level surface.
- Turn off the engine and allow it to cool down.
- Engage the parking brake.
- Raise the vehicle using a jack and jack stands until the wheels are off the ground.
3. Locate the speed sensor.
- The speed sensor is located on the transmission, near the left front wheel. It is a small, cylindrical sensor with a wire connector attached to it.
4. Disconnect the speed sensor connector.
- Use a screwdriver to pry open the locking tab on the speed sensor connector.
- Pull the connector straight off of the sensor.
5. Remove the speed sensor mounting bolt.
- Use a wrench to loosen the speed sensor mounting bolt.
- Remove the bolt and take out the speed sensor.
6. Clean the speed sensor mounting surface.
- Use a wire brush to clean the speed sensor mounting surface on the transmission.
- Remove any dirt, debris, or old sealant.
7. Apply sealant to the new speed sensor.
- Apply a small amount of sealant to the threads of the new speed sensor.
- This will help to prevent leaks and ensure that the sensor is properly sealed.
8. Install the new speed sensor.
- Screw the new speed sensor into the mounting surface on the transmission.
- Tighten the mounting bolt until it is snug.
9. Reconnect the speed sensor connector.
- Push the speed sensor connector back onto the sensor until it clicks into place.
- Make sure that the locking tab is engaged.
10. Lower the vehicle.
- Use the jack and jack stands to lower the vehicle until it is back on the ground.
11. Test the speed sensor.
- Start the engine and let it idle.
- Drive the vehicle at a slow speed and verify that the speedometer is working properly.
12. Congratulations!
You have successfully installed a speed sensor on your 1997 Nissan Altima.
