Under the cover plate in the front and under the coils (both front and
rear).

In the engine.

kai
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g2004 at g3prod.cotse.net

in the cylinder head over top of each piston

Jeez, I wish I had a dollar for every time this question was asked

They are inboard of the valve covers between the intake and the valve
cover.  Be sure to use some compressed air to blow out the dirt before
you remove the plugs.  Also, I like to use WD-40 after I blow out the
dirt so when you take the plugs out the WD-40 will help lubricate the
threads on the head.  Remember that the heads are aluminum and you have
to be carefule not to pull out the threads when you remove the plugs.
Take one plug out at a time and replace it before you go to the next
plug.  Also, get some di-electric grease for the spark plug boots.  If
you are going to do the jjob yourself buy autolite double platinum so
you will not have to do the plugs for another 60K miles.