The 05 will have an IMS bearing that is failure prone but can be easily replaced with the Raby version for around $2K. The 07 factory bearing is much improved but can't be replaced unless you tear the engine completely apart. You shouldn't have to worry about IMS with the 07 but should consider it with the 05.
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GPRPCA Chief Driving Instructor
2008 Boxster S Limited Edition #005
2008 Cayman S Sport - Signal Green
1989 928 S4 5 spd - black
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