2005 boxster s - buzzing noise at 3k rpms
#16
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I had the same 2100 rpm buzz/rattle problem while the engine was warming. These were the parts they replaced:
997-102-117-00 Tension roller (didn't fix it alone)
997-102-119-00 Deflection roller (ditto)
997-603-012-CX Generator
996-102-151-66 Ribbed v-belt
997-107-125-01 Oil Pump Piston
This fixed the problem.
997-102-117-00 Tension roller (didn't fix it alone)
997-102-119-00 Deflection roller (ditto)
997-603-012-CX Generator
996-102-151-66 Ribbed v-belt
997-107-125-01 Oil Pump Piston
This fixed the problem.