Clean the interior of the casing and then re-assemble. Slide the new mast into the top of the antenna hole and feed it down into the unit. Have someone switch the radio off and then feed the mast nylon toothed end down into the casing until the mechanism catches the mast and pulls it in. Then raise and lower it a couple of times.
Good luck!
For some reason I have 2 OE rebuilt units and 2 aftermarket ones although I don't have a sedan??
Neil.










