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			- when the Brake Wear light comes on on the dash.   
 
 
Anyway, my Box had 40k miles on it when I got it, and the pads were almost on the wear sensors.  About $110 and two hours of my time, and I had them swapped.  The rotors should be fine, but next time I have to replace pads, I will go ahead and replace the rotors.   
 
If you want to gauge your rotors, here's the specs: 
 
Front rotors 24mm new  22mm worn 
Rear rotors 20mm new  18mm worn 
 
Basically, if your front rotor is less than 22mm, you'd need to replace it.  18mm for the rear.
		 
		
		
		
		
		
		
			
				__________________ 
				2001 Boxster - Grey on Grey 
1969 911T Targa - 'Stinky'
 http://www.zoto.com/frayadjacent/img...f27a-4a399.jpg   <---- my car.   ^ crap I post. 
 
"The existence of the flamethrower is evidence that someone, somewhere once said 'I want to set those people over there on fire, but I don't want to have to walk over there to do it.'"
			  
		
		
		
		
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