I am having a flickering problem with the bulb installed on the passenger side, the low beam only. high beams work fine on both sides. There are 2 ballasts one for the low and one for the high beam on each side of the car, I tried switching the low beam wiring to the other ballast that was working (the kit said it didn't matter what ballast you used) and it still was flickering. I'm wondering if I messed up the bulb somehow because it makes a snapping noise on that side whenever I switch between high and low beam. I really think all of the ballasts work. I've got freinds that praise this kit, why do I have to have the problems.