I recently completed installing an AEM Wide Band O2 gauge and Oil Pressure gauge along with rewiring an aftermarket stereo installation (I can't believe what a lousy job a professional car audio shop did for the previous owner). I did some research to see where to run the wiring to the engine bay and decided to go through the fender well on the driver's side. I never saw this option mentioned. The fender liner was easy to remove and access in the interior was pretty good. If someone does go this route I would recommend they purchase new fasteners for the fender liner before starting since several are sure to break. The access into the engine compartment is just behind the fuse box and the interior access is above the driver's left foot.