So my drivers side low beam headlight won't turn on. The passenger side low beam works but the driver side doesn't. Both high beams work as well. I replaced the bulb and still nothing. I checked the fuses and they all looked good. Then I checked the wiring to the plug of the faulty light and that looked good. Is their a relay hidden somewhere? Their isn't a headlight relay in the fuse box.

 

Where did you get the light bulb and which one did you get? I just went through a similar issue. Take the new bulb and put it into the pass side and the old working bulb from the pass side into the driver side. I did that too and realized the new bulb I got off ebay is defective. I sent it back to ebay and got a genuine D4S philips from Amazon and just installed it like 30 min ago and it works. Its a little brighter than my old bulb so I just ordered another new one so Ill get a match. The link is below and there is even a coupon currently making it like $40 (which BTW beats the 160-250 at the dealer)

BTW there are many different marketplace sellers, make sure you get the one that says Ships from and sold by Amazon.com bc Amazon is an authorized reseller for philips lights and the coupon works. For some reason seller MikeB23 keeps showing up. Also if yours doesn't use HID then forget all Ive said above LOL. I am convinced that this one is the same exact OEM that came with my car (they both practically have the same writing on the bulb which is Philips D4S XenEco D4S 42402...) Also Ive been told the newer ones now might be made my Harison but I don't know how true that is bc I didnt get my bulb from a dealer.