I've owned my S4 for about 6 weeks now. Recently I've noticed that the left HID headlamp is occasionally flickering... I'm wondering if this is a problem with the system or if its just the bulb? If its the bulb, should I replace them both at the same time? I've heard that the system shares current across both sides so I just want to make sure that I fix this 'once'.

 

sorry ot bump an old thread, but:

probably the ballast getting ready to die on you... it will most likely continue to get worse. Mine did, then it died.