Coupe and sedans models use the rear window-mounted antenna grid which is similar to the defogger grid on the rear window, and to replace the antenna, the whole rear window has to be replaced. But if a part of the antenna grid is less than one inch in length it can be repaired by following the same steps as in the case of the repair of rear window defogger grid. As for the XM antenna, the headliner should be pulled out and the electricity connector of the XM antenna should be disconnected and the nut at the base of the XM antenna on the roof of the car should be loosened. Remove the antenna from the roof with the gasket on, where on assembly the nut to the antenna must be tightened to 3.2 ft-lbs. Finally to remove the XM antenna pull it off the roof when the electrical connector is disconnected, and the rest of removal is the reverse of the installation. Also, the XM receiver is mounted on the trunk at the extreme right behind the paneling of the car.