Volvo C30 2007 Service And Repair Manual page 248

ACCESSORIES AND EQUIPMENT Bumpers And Mudflaps - Installation Instructions, Accessories
Fig. 254: Identifying Screws On Rear Fender Front Edge
Courtesy of VOLVO CARS CORPORATION
Fig. 255: Identifying Screws On Rear Fender Rear Edge
Courtesy of VOLVO CARS CORPORATION
Repeat for all wheel housing edges.
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MUD GUARDS, FRONT (2007-09)
MUD GUARDS, FRONT
2012 Volvo C30 T-5