BMW 7 Series: Replacing Battery Negative Lead
WARNING: Observe (SAFETY) INFORMATION ON AGM BATTERY and follow INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY.
Read and comply with notes and instructions on INTELLIGENT BATTERY SENSOR.
Necessary preliminary tasks
- Clamp off BATTERY NEGATIVE LEAD
- Remove LUGGAGE COMPARTMENT STORAGE COMPARTMENT
Slacken nut (1) on negative battery terminal.
Tightening torque 61 21 1AZ.
IMPORTANT: Do not under any circumstances use force to pull off negative terminal.
Detach battery negative lead with intelligent battery sensor (IBS) in upward direction, lay to one side and secure.
Disconnect plug connection (2).
Release nut (3) and battery negative lead (4).
Tightening torque 61 21 6AZ.
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Fig. 24: Identifying Battery With Nut, Plug Connection And Negative Lead
REPLACING POSITIVE BATTERY CABLE (FROM BATTERY TO LUGGAGE COMPARTMENT CABLE CONNECTOR)
WARNING: Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Necessary preliminary work
- Clamp off BATTERY NEGATIVE LEAD
If necessary, unlock and disconnect plug connection (1) of safety battery terminal lead.
IMPORTANT: Do not under any circumstances pull/lever off safety battery terminal (1) by force.
Loosen nut (2).
Tightening torque 61 21 1AZ.
Unscrew nut (3).
Tightening torque 61 21 2AZ.
Slacken nut (4).
Tightening torque 61 21 4AZ.
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Fig. 25: Raising Power Distribution Box
Unclip locking brackets from power distribution box (5) in direction of arrow.
Raise power distribution box (5) in direction of arrow and remove positive battery cable (6).
REPLACING WIRING HARNESS FOR FRONT BUMPER
IMPORTANT: Read and comply with notes on HANDLING WIRING HARNESSES and cables.
Necessary preliminary tasks
- Remove FRONT BUMPER TRIM.
Disconnect plug connections (1) on five ultrasonic transducers.
Unclip wiring harness (2) from bumper trim.
Remove wiring harness (2).
Remove PDC.
Installation: Make sure wiring harness (2) is laid correctly.
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Fig. 26: Identifying Ultrasonic Transducer Plug Connections And Wiring
Harness
READ NEXT:
Replacing Wiring Harness In Left Or Right Front Door
IMPORTANT: Read and comply with notes on HANDLING WIRING HARNESSES and
cables.
Necessary preliminary work
Close front side window completely
Disconnect BATTERY CABLE
Remove SOUND INSULATION IN FR
Butt Connector For Repairing A Plug Connection
Notes
IMPORTANT:
1. Identify cause of damage (e.g. sharp-edged body parts, faulty
electrical
loads, jammed mechanisms, corrosion caused by ingress of water, etc.).
2. Read out fault memory.
3. Elim
SEE MORE:
Rear collision preparation
Concept
The system reacts to vehicles approaching from
behind.
General information
Two radar sensors in the rear bumper monitor
the area behind the vehicle.
When a vehicle approaches from the rear at a
certain speed, the system responds as follows:
Active Protection: when a collision seems to
Mechanical/Hydraulic Components
REMOVING AND INSTALLING/REPLACING DSC HYDRAULIC UNIT
Necessary preliminary work
Read and comply with GENERAL INFORMATION.
Remove front left rear WHEEL ARCH PANEL
Remove left UNDERBODY PANELLING
After completing work:
BLEED BRAKE SYSTEM
IMPORTANT: Do not mix up brake lines.
If necessary, mar
