Removal:
1. Park on a level surface, set the parking brake, remove the key, and wear eye protection and gloves.
2. Protect painted surfaces and interior trim with cloths or fender covers before working near the antenna area.
3. Disconnect the negative battery terminal to prevent shorts; isolate the cable away from the battery.
4. Locate and remove any interior access panels or trim (typically in the trunk, headliner, or under trim) to reach the antenna base hardware.
5. Carefully release and label the antenna electrical connector(s) and coax cable(s); disengage any retaining clips or grommets.
6. Support the antenna assembly from the outside while removing its mounting hardware (nuts, screws, or clips), noting that fastener type and count vary by design.
7. Remove the antenna assembly or mast from the vehicle; if the mast is removable, unscrew or unclip it per its design.
8. Clean the mounting surface of old sealant and debris, and inspect the hole and wiring for corrosion or damage.
9. Set the old hardware, gaskets, and components aside for comparison with the replacement part.
Installation:
1. Compare the new antenna assembly to the old unit and transfer any necessary gaskets, seals, or mounting pieces supplied with the replacement.
2. Route the antenna cable through the opening and seat any grommets so the wiring is not pinched; use new grommets or sealant if provided.
3. Apply a light coating of dielectric grease to electrical contacts if appropriate and recommended for the connector type.
4. Position the antenna base and loosely install the mounting hardware to align the assembly before final tightening.
5. Progressively tighten the mounting hardware until the antenna is snug and the gasket is compressed; avoid over-tightening.
6. Reconnect the coax and electrical connectors, securing wiring with clips or ties so it cannot chafe or snag.
7. Reinstall interior access panels and trim, ensuring clips engage without distortion.
8. Reconnect the negative battery terminal and clear any stored codes if required by the vehicle systems.
9. Test antenna function: check AM/FM reception, satellite or data services if applicable, and any related hands-free or navigation features.
10. Inspect the exterior mounting area for a proper seal and, if practical, check for leaks after a light water test or driving in wet conditions.
Repair tip: Always replace worn gaskets or weather seals with new parts to ensure a good waterproof seal and reduce chances of corrosion or noise issues.