To replace the antenna assembly for cellular and navigation, first remove the rear part of the headliner and disconnect cable connectors. Next, pull up the retaining bolt and remove the antenna assembly from the roof. For installation, slot the antenna assembly back into the roof, and tighten the retaining bolt to 9 N.m (80 lb in), following the Fastener Notice in Service Precautions. After installing the antenna, reattach the cable connectors and reinstall the headliner.