F82 M4 seats into an E46 M3

[Ace280]

What about bypassing the controller completely to avoid trying to trick them with a false kcan signal? Basically just straight wiring to the switches, then to the motors? Or maybe trying to wire in the original e46 controller? I imagine you might lose some features like seat memory but I imagine for most people doing this this is not a major concern.



I'm interested in maybe trying a f3x sport seat swap, just to get new, comfortable seats for a primarily street car. Rather then faff around with trying to re foam my originals.

I really think that would take more work and a lot more wire splicing. I have some parts on order for a circuit to pulse the Can High and the circuit would only turn on if either the interior lights are on or the ignition is on. Once that is figured out, it is on to the passenger seat occupancy sensor. I am thinking of just taking one out of an e46 seat and installing it into the M4 seat. I want to first play with one and compare it to the one that is currently installed in the M4 seat.

[Lee_Enfield]

What about bypassing the controller completely to avoid trying to trick them with a false kcan signal? Basically just straight wiring to the switches, then to the motors? Or maybe trying to wire in the original e46 controller? I imagine you might lose some features like seat memory but I imagine for most people doing this this is not a major concern.



I'm interested in maybe trying a f3x sport seat swap, just to get new, comfortable seats for a primarily street car. Rather then faff around with trying to re foam my originals.

[SuperDrivetrainSolutions]

Are you saying you don't have the car side plug? Most of the wire information needed is in the first post and the first link in the first post.

I dont have the car side plugs yes. So is the wire colours that you describe, on the seat side of the connector plug?

[Ace280]

Great work. I need to retrofit m4 seats into a old nissan S14. I didnt get plugs with the seats. Ill have to use individual pins etc. Would you please help out with a plug diagram that corresponds to your wiring info . If you dont mind please.

Are you saying you don't have the car side plug? Most of the wire information needed is in the first post and the first link in the first post.

[SuperDrivetrainSolutions]

Great work. I need to retrofit m4 seats into a old nissan S14. I didnt get plugs with the seats. Ill have to use individual pins etc. Would you please help out with a plug diagram that corresponds to your wiring info . If you dont mind please.

[Ace280]

Started working on this and figured out you can repin the E46 seat connector, so no need for an F82 pigtail. You do need to modify the e46 seat connector a little to get it to lock into the mount on the M4 seat.

[Ace280]

I know this is an older thread, but was wondering if there was any new information on this that might be helpful. I am also looking at designing a circuit to power the seats when the interior lights are on or if the ignition is on, so that way they work more like the factory seats. I will post any new information as I work on this project, really excited to get these M4 seats installed.

[iCoutino]

Hey, I’m trying to do the same to my e92 335, I hope your post helps me, thanks for sharing!

[trigtm]

I paid $1500 for the seats and probably another Hindi or so for the harnessed and wiring I needed to get this done.

If the G8x seats are the same bolt pattern as the F series. The same mounting would apply here. On the wiring though, it’s anyone’s guess. I chose to wire the seats in with a momentary switch which powers the seats on for 15 sec at a time since I have no idea nor wish to know how to emulate the later CANBUS/KCAN required that the E46 doesn’t use. There is no loss of functionality.

How they look are subjective but seeing them in person, it really looks OEM and fixes the biggest problem with the E46 intention IMO. The stock seats are just bad, even new. You slide all around in them and end up having to brace yourself against the door which on autox or track, which I have don’t both before and after, is really night and day difference.


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[usdmej]

The seats would be worth more than the car!

Someone on bimmerpost priced them out at over US$30k from a dealer. Outrageous pricing but gorgeous seats.

https://g80.bimmerpost.com/forums/sh...1&postcount=20

yikes, even by bmw dealer standards that's ridiculous

that's more than porsche charges for their carbon buckets!

https://www.suncoastparts.com/product/GT2SEATS.html

[m3nt0s]

Cool project but those seats look completely out of place IMO

[jdamore44]

The seats would be worth more than the car!

Someone on bimmerpost priced them out at over US$30k from a dealer. Outrageous pricing but gorgeous seats.

https://g80.bimmerpost.com/forums/sh...1&postcount=20

This was for G8x seats, by the piece. He's talking about the F82 seats.. which are somewhere in the 2k range for used. https://www.ebay.com/itm/29430104520...EAAOSwErJhAYW2

Edit: My bad, I see the previous post was refering to the carbon seats.. holy smokes!

[ggeezer]

it would be game over if someone could make the G82/83 carbon buckets work on an E46

The seats would be worth more than the car!

Someone on bimmerpost priced them out at over US$30k from a dealer. Outrageous pricing but gorgeous seats.

https://g80.bimmerpost.com/forums/showpost.php?p=27770841&postcount=20

[dukeofchen]

Breakdown of costs here:
Steel for the mounts: $35 - Need to slice and dice, bolts and washers, $10 drill and finish it. Probably 2 hours total of labor for both.
Wiring harnesses: $160 - $80 for the M4 body harnesses (ebay) and another $25 for the e46 seat side connectors. Another $25 for the two buckles. Add in some extra wire, $10 plus some Amazon pin harnesses, $20 and about 4h for labor
Wiring in the car: $20 - Some wiring, $5, the 5v converter, $15, snaking the harness which is labor, 2h

So about $215 in parts, 8h labor give or take. Doesn't seem cost efficient to do this for someone else but I would be happy to for the right price! I don't really put a monetary value on my time since I worked on this over a couple weeks as a hobby but the biggest single expense was the F82 body pigtail harnesses since there are none in any junkyards I have found (checked 4) and I'm not sure what other car the connector is used on. You 'could' convert the seat to use the e92 connector and use a body connector from a local yard, which would be cheaper, but would add to the labor time.

This is awesome, and the seats look great in the car. Would love to have this on my street queen. How much were you able to get the seats for?

[jet_dogg]

This looks bad.