'07 IS250 Driver's Headlight Problem
 

I recently changed my headlight assembly to dtmotos led drl headlights cause my stock headlights had the same problem. I had the d4s hid replaced under warranty when i first got the car, but 2 months later the drivers side went out again so i just changed both headlamps and bulbs that came with the kit from Dtmotos. Had these new headlights for 2 days and the drivers side went out again today and wont turn on. What could be the problem ?

The problem is they're aftermarket.

Bulbs. Mine did the same thing and replacing the bulbs fixed the issue.