Volvo 2008 S40 Owner's Manual page 229

engine power over that developed by the normally-aspirated engine. The charge air cooler (which resembles a radiator)
is located between the turbo-compressor and inlet manifold.
Fuel system
The engine is equipped with a multiport fuel injection system.
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11 Specifications
Electrical system
General information
12-volt system with voltage controlled generator. Single wire system in which the chassis and engine block are used as
conductors, grounded on the chassis.
Battery
1
Models equipped with the High Performance audio system
2
Models equipped with the Premium Sound audio system, the Volvo Navigation System and/or keyless drive
If the battery must be replaced, replace it with one with the same cold start capacity and reserve capacity as the
original (see the decal on the battery).
WARNING
PROPOSITION 65 WARNING!
Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the state of
California to cause cancer and reproductive harm. Wash hands after handling.
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11 Specifications
Electrical system
Bulbs used in the car