Strange rattle / metal shaking sound 99 Boxster

[don330]

Did you ever figure out what the problem was? My Boxster has been making this noise on acceleration at low speeds for quite some time now. It's been in for service and my mechanic hasn't picked up on anything. It doesn't seem like anything major but the noise is annoying.

[Reebuck1]

Had a similar problem with my 1999 C4. Ended up banging on the heat shields on the exhaust manifolds and it fixed the problem. You have something like it on your exhaust just in front of the CAT. It is welded to the pipe in front of the CAT. It could be source of the rattle.

[apatt]

Originally Posted by don330

Did you ever figure out what the problem was? My Boxster has been making this noise on acceleration at low speeds for quite some time now. It's been in for service and my mechanic hasn't picked up on anything. It doesn't seem like anything major but the noise is annoying.

Had the same problem, sounded like a can with marbles rattling around coming from the rear of the car when driving at low speed on cobbled roads, turned out it was the rear track control arm. Got it sorted and its fine now, this is apparently a wear and tear item which is a common issue with cars that are getting on now. Best of luck!