2003 Volvo V70

Question: Where are the Spark plugs? It is a base 5 cyl.2.4L

They're under the black cover on top of the head. You'll need a Torx driver, I think it's a T-40. Remove the cover, then remove the coil on top of each spark plug, try using a felt pen and marking the coils first so they go back in the same place. Once you get the coils off, the plugs are removed and installed normally. I suggest using only Volvo plugs, just to avoid any misfiring later on.
Good Luck