A few years ago I was installing air lift air bags in my brand new Toyota four runner. Week old. Well I had to run some wiring thru firewall and thought the rubber surrounding the main wiring harness was a good place. Long story short it was not. Drill slipped nicked the wires . No way to repair harness in vehicle. I had to remove the main harness from vehicle to repair. Well when Simone got home she saw our brand new car in pieces. Was not happy.....beer was involved