[jon328i]

Today i hacked in on my light switch to see if i can activate my rear fogs just like what i did on my old E90 rear fogs. Unfortunately, BMW decided not to pre-wire the rear fog bulb on the rear hatch (cost-cutting on USDM versions again!)...bummer. There is one wire missing on the lens assembly electrical plug on the hatch door.







Remove the tabs:





I just did a jumper wire to activate the rear fog bulbs to light up as my park light/running light since BMW deleted the 4th wire on the plug.

[rice_rocket88]

Emmm... did you look at the other threads on rear foglight? I just coded mine on a month or two ago.. The switch is there and just needed a shave. I have a 2019 model fyi. Well.. you got it to work either way.

[jon328i]

Originally Posted by rice_rocket88

Emmm... did you look at the other threads on rear foglight? I just coded mine on a month or two ago.. The switch is there and just needed a shave. I have a 2019 model fyi. Well.. you got it to work either way.

Yes i did shaved/trimmed the tabs on the blank button shown on my pic above, rear fogs did not light up, found out the rear fog light module was not pre-wired (missing 4th wire on the plug) by BMW therefore it won't light up whether you code it or not.

[shadows]

jon328i when you coded did you have any issues with warranty? Or is this type of coding irrelevant to warranty? Mine warranty through 2026 so I do not want to mess with anything up until then.

[chowser51]

I coded my ‘19. Shouldn’t affect warranty.
Last time I was in for the telematics recall they told me they would have to update the software and all my coding would be gone and I would have to recode. Didn’t take long.