Originally Posted by
MarcoZandrini
That’s odd. Here’s why. From model years 1999 to 2002 (inclusive) the head unit has 2 radio frequency (RF) inputs: AM and FM. Starting in 2003 the head unit, made by Alpine, has a single RF input. That single input carries both AM and FM signals. It looks like your car has a head unit from an earlier car. Remove the head unit and take pictures of the head unit labels.
How to remove the head unit:
- remove the 2 horizontal trim pieces
- remove the 2 phillips screws
- slide the head unit out.
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