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					Originally Posted by 10/10ths  Also, if you R&R the alternator, replace all of the idler pulleys, too.   
 I know of three Boxster fires caused by idler pulleys that seized and caused the serpentine belt to catch fire.
 
 When I bought my 2004, she only had 25,000 miles on her. I replaced the serpentine belt at that time, and one of the idler pulleys had already started to fail.
 
 Good luck.
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Hmmm...
You’ve given me a lot to think about. So I have an 02 S with 34K miles. I now have the engine exposed top and front with the alternator laying on my tool bench, voltage regulator removed. I was thinking I would just attach the new regulator tomorrow and install, slip the belt over the pulley and see what happens. If the battery light returned I would then go the alternator route. If it stayed off, I would put all the covers back in place and take a nice weekend drive. Now I’m wondering if I should just bite the bullet and order the alternator, belt, and pulleys regardless, replace everything and have it all done???