52 14 899 Additional Work (Normal/ Electric) With Defective Drive For Longitudinal Adjustment

WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Set seat tilt adjustment to max. up setting.

Release screw (1) on actuator drive (2) of longitudinal seat adjustment.

Fig 1: Releasing Screw On Actuator Drive

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Release screw (1) on servodrive (2) of longitudinal seat adjustment and remove servodrive (2).

Fig 2: Removing Servodrive

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Activate the operating switch for the seat position adjustment:

No function:
- Disconnect plug for longitudinal seat adjustment
- Connect new servodrive and check function
- If servodrive is running, gear is O.K.
- Reassemble front seat
Actuator drive running:
- Transmission for longitudinal seat adjustment defective!
- Continue with

Disassembly of faulty gear for longitudinal seat adjustment

Disassembly of faulty gear (1) for longitudinal seat adjustment:

NOTE: For purposes of clarity, the backrest frame and seat cover are shown removed.

(2) Input shaft
(3) Internal gear

Fig 3: Identifying Components Of Longitudinal Seat Adjustment
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Using a pneumatic saw (1), cut through drive shaft (2) from rear.

Fig 4: Cutting Through Drive Shaft

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Remove drive shaft (1) from gear (2).

Fig 5: Removing Drive Shaft From Gear

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Release screw (1) and remove gear (2).

Fig 6: Removing Gear

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Over rest of drive shaft (1), adjust front seat, release screws on floor panel and remove front seat.

Fig 7: Removing Gear

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NOTE: If gear (4) is faulty,
detach cover (2), release screws (3), and remove gear (4).

Replace seat mechanism on front seat.