I have a '99 Boxster with 27k on the clock. Recently a "clunk" noise has developed. I need your help in finding it.
TIMING: It happens when I slow to a stop, and then at the last second, before true-stop, there is a "clunk." It's at that moment when inertia transfers from forward movement (braking) to backward (the stop). It does NOT happen while driving and does NOT happen over bumps, so I don't think it is suspension related.
LOCATION: The sound is coming from what sounds like the passenger door area. Passengers say it is coming from their lower door panel area about the thigh or butt height.
ATTEMPTED EXPLORATION: I have taken the door panel off and driven the car. The noise was still there so NOT in the door panel itself. I have taken the footwell area (above passenger's feet) apart. Nothing seems loose.
Any advice would be appreciated.
Thanks!