When replacing the seat frame of the driver seat: Remount components
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
- Unlock and disconnect all the plug connections of SMFA control unit (2).
- Unlock the snap-in lugs (1).
- Pull the SMFA control unit (2) forward.
Removing the outer seat rail cover
NOTE: RISK OF DAMAGE
Careless handling of tools and sharp-edged components .
Scratches, surface damage .- Protect working area.
- Handle tools and components carefully.
- Unclip the detents (1).
- Unclip the detent (1) in the arrow direction (2)
- Unclip the detent (3) in the arrow direction (4)
- Remove the outer seat rail cover (5).
Removing front lower strap
- Loosen screw (1).
- Disconnect the connector (2) and unclip the present cable holder.
- Pull out the lower belt (3) and remove.
Removing the fan for the seat surface
Precondition
Front seat is adjusted completely back and upward.
NOTE: To provide a better overview: Illustration of surrounding parts removed. - Loosen the attachment points (1).
- Detach detents (2).
- Unlock plug connection (3) and disconnect.
- Feed out the fan (4) for the seat surface.
Installing the fan for the seat surface
Precondition
Front seat is adjusted completely back and upward.
NOTE: To provide a better overview: Illustration of surrounding parts removed. - Connect connectors (3) and lock.
- Feed in the fan (4) for the seat surface and position it correctly.
- Attach the detents (2).
- Connect the attachment points (1).
Installing the front lower strap
NOTE: TECHNICAL INFORMATION
Clean all threaded belt connections with micro-encapsulated outer and internal threads.
Shavings or other debris must not remain in the components.
If a microencapsulated screw is reused, it must be coated with the following screw locking agent: Loctite 243, medium strength .
The screw connection must be completed within 10 minutes as hardening begins after this period.NOTE: TECHNICAL INFORMATION
Component is encoded against incorrect assembly. - Insert and position the lower strap (3).
- Replace the screw (1).
Parts: Screw
- Tighten down screw (1).TIGHTENING TORQUE SPECIFICATIONS
Lower strap to seat mechanism M10 screw Replace screw. Tightening torque 38 Nm - Connect the plug connection (2) and clip in any existing cable clips.
Installing the outer seat rail covers
NOTE: RISK OF DAMAGE
Careless handling of tools and sharp-edged components .
Scratches, surface damage .- Protect working area.
- Handle tools and components carefully.
- Correctly position the outer seat rail cover (5).
- Clip in the detents (3) in arrow direction (4).
- Clip in the detents (1) in arrow direction (2).
- Clip in the detents (1).
- Press the SMFA control unit (2) in the holder until the snap-in lugs (1) engage.
- Connect and lock all related connectors of the SMFA control unit (2).