Removing and installing/replacing forward/back seat adjustment drive unit

Preliminary work needed:

Removal of electric motor for forward/back seat adjustment:

Unfasten plug connection (1) and disconnect.

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Lift long flex shaft (3) out of guide in arrow direction.

Pull out flex shaft (3) from electric motor for forward/back seat adjustment (1).

Remove electric motor for forward/back seat adjustment (1) in arrow direction from holder (2).

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Installation of electric motor for forward/back seat adjustment:

Slide seat rail with opening forward or back until connector for flex shaft mounting of worm gear is flush.

Insert short flex shaft.

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Connect electric motor for forward/back seat adjustment (2) to short flex shaft (1).

Installation note:

Make sure flex shaft (1) is correctly seated in electric motor (2) and seat rail mounting.

Clip in electric motor for forward/back seat adjustment (2) into holder (3).

Installation note:

Electric motor for forward/back seat adjustment (2) must audibly engage in holder (3).

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Courtesy of BMW OF NORTH AMERICA, INC.

Insert long flex shaft (2) in worm gear on seat rail.

Bend long flex shaft (2) upwards and slide into electric motor for forward/back seat adjustment (1).

Clip in flex shaft into carrier plate.

Installation note:

Make sure flex shaft (2) is correctly seated in electric motor (1) and seat rail mounting.

Installation note:

PTFE hoses are shrink-fitted onto end pieces.

Check that hoses are free from damage.

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NOTE: Carry out functional check.

Replacement:

Initialize drive unit for forward/back seat adjustment. See INITIALIZATION .