52 14... Additional work (normal/electric) with defective drive/gear for longitudinal adjustment

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 528xi, 2010 BMW 528i, 2009 BMW 528xi, 2009 BMW 528i, and 2008 BMW 528xi. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Seat rails must be replaced by detaching worm gear.

Move seat height and seat tilt adjustment to top position.

To obtain improved access if necessary:

Release screws (1).
Tip seat towards rear.

Installation:

Tightening torque, 52 10 6AZ . See 10 FRONT SEATS .

Fig 1: Identifying Screws

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Lift drive (1) and flex shaft (3) out of guide (2) in direction of arrow.

Detach flex shaft (3) (plug connection).

Fig 2: Lifting Drive And Flex Shaft Out Of Guide

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Release screws (1).

Remove drive (4).

Detach flex shaft (3) with holder (2).

Fig 3: Identifying Flex Shaft With Holder And Screws

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Activate the operating switch for the seat position adjustment:

No function:
- Disconnect plug connection on drive.
- Connect new drive and check function.
- Gear is O.K. if drive runs.
Assemble seat.
Drive running:
- Gear for longitudinal seat adjustment defective.

Removing gear for longitudinal seat adjustment:

Release screws (1).

Remove worm gear (2) on left and right with cover.

Fig 4: Identifying Worm Gear And Screws

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Release screws (1) on upper rail on left and right.

NOTE: The seat can now be adjusted together with the upper rail.

Remove front seat.

Replace both seat rails.

Fig 5: Identifying Screws On Upper Rail On Left And Right

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