Installation Guide: Active Suspension Control for BMW G-Series

This guide will walk you through the installation of the Active Suspension Control for air suspension lowering for the following BMW G-series models:

• BMW 5 Series & 6 Series G-Series

• BMW 7 Series G-Series

• BMW X5 / X6 / X7 G-Series

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1. Important Safety Information & Legal Notices

• Qualified personnel: Installation may only be carried out by trained specialists when the system is de-energized.

• Battery: Before beginning work, disconnect the battery from the vehicle's electrical system in accordance with the vehicle manufacturer's specifications.

• German Road Traffic Licensing Regulations (StVZO): Please note that this is a component requiring registration. Please complete this registration as soon as possible.

• Driver assistance systems: Depending on the chosen lowering, we recommend recalibrating the driver assistance systems to maintain full functionality.

2. Technical Specifications

Feature	Value
Operating voltage	7 V to 20 V
Operating temperature	-40°C to 85°C
Average current consumption	250 mA

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3. Preparation & Trim Removal

For the mentioned models, the air suspension control unit is located behind the right side trim in the trunk.

• BMW 7 Series (G11/G12): Open the trunk. Loosen all screws (including hidden ones) to unclip the right side compartment. Remove the cargo area trim for easier removal.

• BMW 5 Series / 6 Series: For the 6 Series GT, the compartment can be easily removed. For the 5 Series, the entire side trim must be removed. The control unit will then be directly visible.

• BMW X5: The right side trim must be completely removed, as the control unit is hidden, and access is not possible via the side compartment alone.

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4. Connection to the Control Unit

1. Locate the air suspension control unit.

2. Unplug the wide, left connector (51-pin, black).

3. Unlock the connector by simultaneously pressing apart the latches to pull the contact housing out of the rail.

Important note: Double-check every pin number! Incorrect connection can damage the control unit. If you are unsure, stop the installation and contact a specialist workshop.

Pinning sensor wires:

• Pin 25: Unpin wire -> insert into Pin 2 of a new 2-pin housing. Insert the red/white wire of the new wiring harness into Pin 25.

• Pin 45: Unpin wire -> insert into Pin 1 of the 2-pin housing. Insert the black/white wire into Pin 45. Connect this housing to the white + black wire pair.

• Pin 14: Unpin wire -> insert into Pin 2 of a new 2-pin housing. Insert the green/white wire into Pin 14.

• Pin 28: Unpin wire -> insert into Pin 1 of the previously used 2-pin housing. Insert the blue/white wire into Pin 28. Connect this housing to the blue + green wire pair.

• Pin 26: Unpin wire -> insert into Pin 1 of a new 2-pin housing. Insert the violet wire into Pin 26. Connect this housing to the corresponding violet counterpart.

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5. CAN Bus Connection

The CAN bus is implemented as a twisted pair of wires.

• Vehicles before LCI (pre-facelift): In the cable duct, look for white/yellow twisted with white/blue.

  • Orange/black (CAN-HIGH) to white/yellow.

  • Orange/brown (CAN-LOW) to white/blue.

• LCI models (facelift): The tap is located on the left side of the trunk. Look for grey twisted with black.

  • Orange/black (CAN-HIGH) to grey.

  • Orange/brown (CAN-LOW) to black.

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6. Power Supply (12V)

1. Ground: Connect the ground cable to a suitable body ground point.

2. Continuous positive: Locate a fuse with continuous positive (12V) in the fuse box. Measure to be sure.

3. Fuse holder: Remove the original fuse and insert it into the fuse holder. Insert the holder (with both fuses) back into the original slot.

Completion: Perform a functional check before reassembling the trim panels in reverse order.