[s-cars] serpentine belt tensioner 054 903 133A

[David Forgie]

I don't know if this is a new thread or an old thread from January.  I can't tell what the problem is, 
i.e. cracked housing and loss of spring tension or a squealing bearing.  If it is the latter, you don't
have to buy a complete housing, just a replacement bearing (with some DIY).

In this regard, you might not have seen the link I have posted before about the serp belt tensioner, 
with its internal (and improved) links  to Fred Munro's tensioner roller bearing R&R:

http://forums.quattroworld.com/s4s6/msgs/22579.phtml

HTH

Dave F.