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Subframe O-Ring (Addresses sub-frame knocking noise)

Genuine Volvo - 8638585 - 115683

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Volvo (TSB) Techinical Service Bulletin: VCC-130664 US 2003-03-20 / S80-2-21-0030

"A knocking noise that may occur when driving at low speeds on uneven road or at sharp turns, can be caused by one of the the rear subframe bushings moving in the sub-frame. The knocking can sometimes also be felt in the floorboard under the drivers feet. Install an O-ring between the sub-frame and the bodywork on the rear bushings on both left and right side as a service solution."

This bulletin specifies this fix for S80 models but since the subframes and bushings are the same on other P2 models, it is likely that S60, V70 and possibly XC90 models may experience the knocking effect also.

Knocking noises are more commonly a result of worn out sway bar end links.

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