[N8k]

Good day everybody! Yesterday i changed seats in my 2012 f30 from the ordinary one with sensatec(mechanics, seat heat) to leather sport lci. I also changed the blue thingy in connector because i found them a little bit different, i used my old ones from previous seats and put them to the new. What i got now - heating is working, BUT - when i turn on heat for passenger it work for driver, and the same way for drivers button Where and what i did wrong ? Thanks, Nik.

[1QuikWS6]

BTW, the blue thingy in the connector is the end from the seat airbag wiring, while the white connector is from wiring to active seat belt adjuster...



I have done (2) seat swaps in my BMW's - 1 with M3 seats into my E90, the other just recently with M4 seats into my F32

I have found by experience (while some say it's not necessary) that it's best to swap over the Airbag, Active Seat Belt Adjuster, & the Seat Control Module from your old seats - to the new seats

The airbag is a PITA & a little fiddly due to the wire routing, but it's worth it in the end as my swaps have had absolutely no errors & all functions work as they should


> My advice would be to 1st get the Control Modules off your old seats (gray or white box that most of the wires plug in to as seen in pic below) & install them in your new seats. Make sure you plug all the wires back in to the correct spots



DS for DS, PS for PS, don't mix them up, & see if that cures the problem

BMW has the DS/PS wired in a funky fashion that tends to create problems when retrofitting

[N8k]

Originally Posted by 1QuikWS6

BTW, the blue thingy in the connector is the end from the seat airbag wiring, while the white connector is from wiring to active seat belt adjuster...



I have done (2) seat swaps in my BMW's - 1 with M3 seats into my E90, the other just recently with M4 seats into my F32

I have found by experience (while some say it's not necessary) that it's best to swap over the Airbag, Active Seat Belt Adjuster, & the Seat Control Module from your old seats - to the new seats

The airbag is a PITA & a little fiddly due to the wire routing, but it's worth it in the end as my swaps have had absolutely no errors & all functions work as they should


> My advice would be to 1st get the Control Modules off your old seats (gray or white box that most of the wires plug in to as seen in pic below) & install them in your new seats. Make sure you plug all the wires back in to the correct spots



DS for DS, PS for PS, don't mix them up, & see if that cures the problem

BMW has the DS/PS wired in a funky fashion that tends to create problems when retrofitting

Big thanks to you for such a big answer !!

This is how "control module" on my seats look like ?!
[IMG][/IMG]
[IMG][/IMG]

About Airbag replacement - i think i can do it, not a big deal for sure, but need to unscrew seats again. =))

[7iM3less]

Originally Posted by 1QuikWS6

BTW, the blue thingy in the connector is the end from the seat airbag wiring, while the white connector is from wiring to active seat belt adjuster...

[IMG]https://c1.staticflickr.com/6/5680/3...6abcb5fe_z.jpg[/IMG]

I have done (2) seat swaps in my BMW's - 1 with M3 seats into my E90, the other just recently with M4 seats into my F32

I have found by experience (while some say it's not necessary) that it's best to swap over the Airbag, Active Seat Belt Adjuster, & the Seat Control Module from your old seats - to the new seats

The airbag is a PITA & a little fiddly due to the wire routing, but it's worth it in the end as my swaps have had absolutely no errors & all functions work as they should


> My advice would be to 1st get the Control Modules off your old seats (gray or white box that most of the wires plug in to as seen in pic below) & install them in your new seats. Make sure you plug all the wires back in to the correct spots

[IMG]https://image.ibb.co/gCS4tH/E6_CC5_D...969_E60_F2.jpg[/IMG]

DS for DS, PS for PS, don't mix them up, & see if that cures the problem

BMW has the DS/PS wired in a funky fashion that tends to create problems when retrofitting

Interestingly enough I've installed f82 seats into my F30. Original control module was fine for the driver, all functions great. For the passenger not so much. With original control module nothing works. With the SM2 grey box (used from original al F82 seat) I get power now but it cuts after a minute. Only way to get power is to unplug battery and then again after 60 seconds it cuts out every time.

So drivers seat is good, but passenger side being a pain.

I've swapped out all airbags and seat belt connectors as well...

[1QuikWS6]

Originally Posted by N8k

Big thanks to you for such a big answer !!

This is how "control module" on my seats look like ?!
[IMG][/IMG]
[IMG][/IMG]

About Airbag replacement - i think i can do it, not a big deal for sure, but need to unscrew seats again. =))

At this point, if you aren't getting any airbag codes then your good to go - no need to switch the airbag out. It will have nothing to do with the seat heating

Try swapping in your original seat modules and see if that helps

[N8k]

Originally Posted by 1QuikWS6

At this point, if you aren't getting any airbag codes then your good to go - no need to switch the airbag out. It will have nothing to do with the seat heating

Try swapping in your original seat modules and see if that helps

By seat modules do you mean this black boxes under my seats on the photo ?!
Yeah, i have nothing at the dashboard about Airbags, i think they are ok. I made my seat swap with turned off the minus from the battery. Thanks!

[1QuikWS6]

Originally Posted by N8k

By seat modules do you mean this black boxes under my seats on the photo ?!
Yeah, i have nothing at the dashboard about Airbags, i think they are ok. I made my seat swap with turned off the minus from the battery. Thanks!

Yes the black boxes

To be certain, disconnect ground from battery again when you swap the modules

[N8k]

Originally Posted by 1QuikWS6

Yes the black boxes

To be certain, disconnect ground from battery again when you swap the modules

Sure! Thanks, ill try it.
Text here after it with results...

[N8k]

Good day, update after black boxes replacement(seat modules) from old factory seats to new ones
-nothing changed, seat heat still work incorrect
-good news is that there is still no errors
___________
This is how they look like, bottom is old one

[IMG]
[/IMG]
[IMG][/IMG]
___________
And here is another question. New seats came with electro side seat support, my old ones didn't have this function. I read about it what ppl just connect 2 wires under the seat and it work... any suggestion on how is better for me to make it work ?!

Under the seat look
[IMG][/IMG]
[IMG][/IMG]

___________
Thanks!

[N8k]

anyone ?! any thoughts ?

[IMG][/IMG]

[Michael340i]

Just wondering if you swap your left and right seat modules if that fixes the problem?

[N8k]

Originally Posted by Michael340i

Just wondering if you swap your left and right seat modules if that fixes the problem?

thanks for advice, gonna try this tomorow

[N8k]

Originally Posted by Michael340i

Just wondering if you swap your left and right seat modules if that fixes the problem?

did not help..

[N8k]

Problem solved with switching sides of yellow underseat connectors, because seats were from rhd auto...
[IMG][/IMG]
[IMG][/IMG]

Right one from second picture should be under passenger seat(with 2 grounds).

[IK6SPEED]

Originally Posted by N8k

Problem solved with switching sides of yellow underseat connectors, because seats were from rhd auto...

Right one from second picture should be under passenger seat(with 2 grounds).

I had the thought that perhaps you had RHD vehicle replacement seats but you never mentioned that and thought it was a very long shot.

I believe it could be reversed in the coding....but apparently you did it in the wiring.

[Michael340i]

Good to hear you got it working, there are a few differences in wiring to drivers seat and passenger seat.

[Szab]

Originally Posted by KC340_F30

Interestingly enough I've installed f82 seats into my F30. Original control module was fine for the driver, all functions great. For the passenger not so much. With original control module nothing works. With the SM2 grey box (used from original al F82 seat) I get power now but it cuts after a minute. Only way to get power is to unplug battery and then again after 60 seconds it cuts out every time.

So drivers seat is good, but passenger side being a pain.

I've swapped out all airbags and seat belt connectors as well...

How did you mount the seat belt? Since in the M4 the seat belt is mounted to the chassis, in the F30 the belt is mounted to your seat. 🤔

[7iM3less]

Originally Posted by szabDev

How did you mount the seat belt? Since in the M4 the seat belt is mounted to the chassis, in the F30 the belt is mounted to your seat. 🤔

The M4 seat has a bolt in the same sport, different style bolt but mounting points the same.

[Szab]

Originally Posted by KC340_F30

The M4 seat has a bolt in the same sport, different style bolt but mounting points the same.

Originally Posted by KC340_F30

The M4 seat has a bolt in the same sport, different style bolt but mounting points the same.

Ah okay, good to know. Could you please take a photo? Unfortunately M2Competition seats don't have that.

[7iM3less]

Originally Posted by szabDev

Ah okay, good to know. Could you please take a photo? Unfortunately M2Competition seats don't have that.

Sorry man I sold the car and seats about 6 months ago...

[Bubble Boy]

Originally Posted by KC340_F30

Interestingly enough I've installed f82 seats into my F30. Original control module was fine for the driver, all functions great. For the passenger not so much. With original control module nothing works. With the SM2 grey box (used from original al F82 seat) I get power now but it cuts after a minute. Only way to get power is to unplug battery and then again after 60 seconds it cuts out every time.

So drivers seat is good, but passenger side being a pain.

I've swapped out all airbags and seat belt connectors as well...

I am in the midst of the same swap, I have the same issue. Did you ever sort it out.

[7iM3less]

PM sent - sorry I don't have a photo and sold my car a few months ago.

As mentioned though there's a nut in the same place as your old seat. You take the nut off and slide the belt harness on the bolt and screw.

Can't miss it.