My mate has a convertible 2000 model and the pasenger seat goes back but not forwards or up/down. The lumbar support works fine. We tested the seat control module with the driver side and it made no difference. In fact the passenger side module works perfectly fine on the driverside so it rules that out.
Whats next, checking wires underneath? It there any way to remove the seat without access to the rear bolts? What can the problem be as i believe its the same motor which moves it back and forth