Quote:
	
	
		
			
				
					Originally Posted by  rene525d
					 
				 
				After noticing that my rear parking sensors stopped working, I also realised that the backup lights do not turn on when reversing. All fuses are ok so it must be the reverse sensor/switch. Is this the switch located at the rear end of the transmission near the tail pipes? Model is a 2004 boxster s. 
			
		 | 
	
	
 
The switch  (or sensor) is located on top of the transmission, more or less in the center of it. 
Check out figure 3 in this article:
http://www.pelicanparts.com/techarticles/Boxster_Tech/45-TRANS-Clutch_Hydraulics/45-TRANS-Clutch_Hydraulics.htm
The arrow points to the switch coonector. The switch itself is located on the other side of the cable. 
I think you can get to it without removing the trans (from under the car, on the passenger side).  You might need to remove the diagonal plat and supporting bars.