2008 Volvo S40 - Volvo Cars Fuse box in the engine compartment . The fuse box in the engine compartment has positions for 36 fuses. Fuses 1-18 are relays/circuit breakers and should only be removed or replaced by an authorized Volvo service technician. Fuses 19-36 may be changed at any time when necessary. Fuse Box Diagram > Volvo S40 (2004-2012) Fuse box diagram (location and assignment of electrical fuses) for Volvo S40 (2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012).