Volvo C30 2007 Service And Repair Manual page 147

ACCESSORIES AND EQUIPMENT Bumpers And Mudflaps - Installation Instructions, Accessories
NOTE: The two rear screws must have two spacer washers each between the mounting
lug and the subframe as shown.
Fig. 53: View Of Washers Between Mounting Lug And Subframe
Courtesy of VOLVO CARS CORPORATION
Fig. 54: Identifying M8 Screws
Courtesy of VOLVO CARS CORPORATION
Torque tighten the M8 screws.
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APPLIES TO CARS WITH 4 CYL. ENGINES
2012 Volvo C30 T-5