The anti-lock brake system (ABS) warning light and/or other dash warning lights may illuminate due to a failed ABS Control Module. Replacement of the failed module is generally required to correct this concern.
2009 Volvo C70 Problem Reports
RepairPal Verified 2009 Volvo C70 Problem Reports
Knocking noises going over bumps can be caused by worn sway bar end links. These end links have small ball joints that become loose and rattle. Replacement is the only fix.
The upper engine mount may wear prematurely. Symptoms may include a harsh feeling when the transmission is shifting and roughness when the engine is idling. Worn engine mounts should be replaced as necessary.
Front upper strut mounts may wear prematurely, resulting in loud noise from the front of the vehicle when going over bumps.