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2010-2020 BMW 750i Technical Service Bulletin # 370111 Date: 111201

2010-2020 BMW 750i Technical Service Bulletin # 370111 Date: 111201

Suspension - Groaning Noise From Front Axle

SI B37 01 11

Special Suspension Systems

December 2011

Technical Service

SUBJECT

Groaning Noise from Front Axle Suspension

MODEL

F07 (Gran Turismo) with Option Code 229 (ARS) up to 2/11

F07 (Gran Turismo) xDrive models with Option Code 229 (ARS) up to 5/11

F10 (5 Series) with Option Code 229 (ARS) up to 2/11

F10 (5 Series) xDrive models with Option Code 229 (ARS) up to 5/11

F01, F02 (7 Series) with Option Code 229 (ARS) up to 2/11

F01, F02 (7 Series) xDrive models with Option Code 229 (ARS) up to 5/11

SITUATION

The customer may report a groaning or rubbing type noise from the front suspension when making a series of turns at low speeds (parking lot

maneuvers). The noise may occur afier initial engine start and will dissipate as the engine reaches normal operating temperature.

CAUSE

The Active Roll Stabilization (ARS) system utilizes a hydraulic pump and an electric valve assembly Under certain driving conditions, hydraulic

pulses from the pump combined with valve actuation can cause resonance in the hydraulic circuit which results in a groaning noise.

PROCEDURE

With the vehicle properly supported on a lift, inspect the ARS hydraulic lines for proper routing and any signs of damage.

Inspect the lines at the right rear in the area near the fuel tank.

2020-2020 BMW 750i (F01) V8-4.4L Turbo (N63) Page 114

Check for the presence of a rubber insulator (P/N 61 13 7 838 241) as shown in the illustration.

If no insulator is fitted, install one and then test drive the vehicle.

Please note: The noise described in this bulletin can typically be confirmed during a brief test drive within the dealership parking lot.

If an insulator is fitted, continue troubleshooting.

Unplug the electrical connector at the ARS valve block and drive the vehicle.

If the noise is still present, reconnect the ARS valve block and continue troubleshooting as the source of the noise is not related to the ARS.

If the noise has been eliminated, replace the ARS valve block according to Repair Instruction REP "3720001 Removing and installing/replacing

DYNAMIC DRIVE valve block"

PARTS INFORMATION

2020-2020 BMW 750i (F01) V8-4.4L Turbo (N63) Page 115
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