Take the under tray off - 7 torx screws around the edge, you'll find it at the back of the sump roughly in the middle of the engine bay as you look up. Always use a new copper washer when refitting the plug.
how do u perform an oil change on the 01 Volvo s40
.30
how locate glow plug relay on 2008 Volvo diesel 2.0D
look at:Besides a coil plug or wire what would cause a 4 cylinder missfire on a 2002 Volvo s40?
Which Tires for volvo S40?
I posted pictures on the location and replacement of an ambient temp. sensor for a 2001 S40. Google "ambient temperature sensor location/replacement" or go to Matthew's Volvo site and search there.
Where is the radiator cap on a 2001 Volvo s40?
yes its in the passengers side bumper unplug and re plug
They should be under the top cover of the engine - no spark plug wires, only some kind of springs that make the contacts.
How do i remove the washer bottle from a volvo s40
How do i remove the washer bottle from a Volvo s40
The spark plug gap on '05 s40 is 0.028 if you have the 2.5 liter engine. If you have the 2.4 liter engine then refer to the sticker on the underside of hood for specific gap info.