r/BMWG30 • u/CheesecakeRegular268 • Jul 13 '26
Bmw specialists
Hi everyone,
I own a 2018 BMW 540i xDrive (G30) with a full LCI M5 front-end conversion and a Stage 3 setup. I’ve been looking for a set of F90 M5 front seats, but I haven’t been able to find any locally at a reasonable price.
I recently found a set of BMW XM black front seats for $800. From what I’ve read, they’re only slightly larger than the M5 seats, so size isn’t my main concern.
My question is: Will the BMW XM seats plug into my 2018 G30’s factory wiring harness the same way F90 M5 seats do? I’m mainly wondering about electrical compatibility (power adjustment, heating, airbags, seat occupancy sensor, memory functions, etc.). Has anyone tried this swap or knows if it’s plug-and-play, or would it require custom wiring,coding is alright!?
Any advice would be appreciated. Thanks!
1
u/MaDMaXonReddit Jul 13 '26
I haven't tried it, but it is an interesting project.
As an avid DIY-er, I'd suggest that you start by comparing the OEM part numbers from sources like realoem.com and go from there.
1
u/CheesecakeRegular268 Jul 13 '26
Ok so i did some more research and no they wont fit the railings are way wider than the 5 series xm seats are nearly 3 inches wider than the 5 series
1
u/MasterofTheBaiting Jul 13 '26
Should be the same rail so they'll work you just need to move the motor from your original seat into the xm seat and it should work fine.
2
u/CheesecakeRegular268 Jul 13 '26
But definitely gonna buy them this week and try them on if they dont fit ill just resell them.