* Vehicle Speed Sensor (VSS): This is the most likely sensor you're referring to if you're having issues with the speedometer. It's usually located on the differential in the rear axle. You'll likely need to get underneath the vehicle to access it.
* Transmission Speed Sensor (TSS): This sensor is part of the automatic transmission and is used by the transmission control system. Its location varies slightly depending on the specific transmission type (e.g., 42RLE, 545RFE) but is generally found on the transmission itself. Access will require getting underneath the vehicle as well.
Important Note: To be absolutely certain of the location, you should consult a repair manual specific to your 2007 Jeep Commander's year, make, model, and engine type. A Haynes or Chilton manual, or a digital version from a site like Mitchell 1, will provide diagrams and precise instructions. Using the wrong information could lead to unnecessary work.
