Just had a look at the wiring for the two headlights and its looks identical, same cores/colours/sizes/plug so looks like a straight swapHow difficult is it to upgrade from H4 to H7? Is it technically possible?
(Sorry if this has been asked and answered already!)
Cant be 100% as VW has made a mistake in the wiring diagrams and shows the H7 headlights as having a twin filament lamp ? so cant differentiate between dip and main but 99.9% sure its a straight swap
The thing i cant get out of my head is why would H7s be any better than H4s ?
At the end of the day normal driving light (dipped beam) is still a single 55W halogen lamp shining out of a reflector that is going to be very similar (probably identical) to a H4 unit, does it make that much difference ?