General Location & Considerations:
* Automatic Transmission: The Vehicle Speed Sensor (VSS) for the speedometer is often located on the transmission case itself. It's usually a relatively small sensor with a single electrical connector. Access may require working under the car.
* Manual Transmission: The speed sensor's location can vary slightly depending on the specific transmission type. It's often found near the transmission, but its precise location may be different than in an automatic transmission car.
* Transmission Sensor (if applicable): A separate sensor may be used by the transmission control system. Its location will also be on the transmission but in a different location than the VSS for the speedometer.
Procedure (General, Consult Your Repair Manual):
1. Safety First: Disconnect the negative battery terminal before starting any work. Support the vehicle securely on jack stands. Never work under a vehicle supported only by a jack.
2. Locate the Sensor: Use your repair manual to pinpoint the exact location of the speed sensor. Take pictures before disconnecting anything to help with reassembly.
3. Disconnect the Electrical Connector: Carefully disconnect the electrical connector from the sensor. Take note of how it is oriented for reassembly.
4. Remove the Sensor: This usually involves unscrewing the sensor from the transmission case. It might be a simple bolt or a more intricate process involving other components. Your repair manual will show you the specific removal method.
5. Install the New Sensor: Carefully install the new sensor, ensuring a snug and secure fit. Tighten according to the specifications in your repair manual.
6. Reconnect the Electrical Connector: Reconnect the electrical connector, ensuring a good connection.
7. Lower the Vehicle: Carefully lower the vehicle from the jack stands.
8. Reconnect the Battery: Reconnect the negative battery terminal.
9. Test: Test the speedometer to ensure it is functioning correctly. A diagnostic scan tool can be helpful to check for any trouble codes.
Important Notes:
* Repair Manual: This is absolutely crucial. The procedure will vary depending on the specific model and transmission type. Attempting this repair without a manual is strongly discouraged.
* Tools: You'll need basic hand tools, possibly including sockets, wrenches, and a ratchet.
* Parts: Make sure you get the correct replacement sensor for your specific vehicle. The wrong sensor will not work.
* Professional Help: If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Improperly installing the sensor could damage your transmission.
This information is for general guidance only. Always defer to your vehicle's repair manual for specific instructions and safety precautions.
