BMW 7 Series: General Information On Light Alloy Disc Wheels
NOTE: It is sometimes difficult to distinguish light alloy disc wheels
visually from steel
disc wheels.
Identifying features:
- Sticker on light alloy disc wheel. (1) = Indication "Aluminium"
- Wall thickness of rim dish: approx. 8 mm.
- Light alloy disc wheels are not magnetic.
- Light alloy disc wheels can be identified from their BMW parts numbers.
Fig. 34: Identifying Light Alloy Disc Wheel Sticker
IMPORTANT:
- Use only BMW-approved two-part balancing weights.
- When fitting two-part balancing weights, always use specified tools.
- Do not straighten light alloy disc wheels: always replace damaged
light
alloy disc wheels.
- Notches in light alloy disc wheels can lead to cracking.
- Do not lubricate wheel nuts.
- When fitting tires, avoid damaging light alloy disc wheels, e.g. on
sharpedged retaining claws on fitting machine.
INITIALIZING RUN FLAT INDICATOR (RPA)
NOTE: Checking the tire pressure is based on monitoring the speeds of the
wheels in
relation to each other. A tire puncture is detected and signalled by way of a
deviation in specific speed ratios.
The four tires mounted on the vehicle are monitored while the vehicle is
moving.
Initialization must be carried out in each case immediately after tire pressures
have been corrected, after tires/wheels have been replaced and after repairs to
the air spring system.
IMPORTANT: The Run Flat Indicator does not function when the vehicle is
driven with the
compact spare wheel.
Please refer to the relevant Owner's Handbook for details of the
initialization procedure.
RDC RESETTING
NOTE: RDC monitors the tire inflation pressure in the four wheels.
Each tire incorporates an electronic wheel circuit, which constantly monitors
the tire inflation pressure.
The system signals when the inflation pressure drops in one or more tires.
Resetting must be carried out in each case immediately after tire pressures
have been corrected, after tires/wheels have been replaced and after repairs to
the air spring system.
Please refer to the relevant Owner's Handbook for details of the resetting
procedure.
READ NEXT:
IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC
DAMAGE (ESD protection).
Necessary preliminary tasks
Remove right LUGGAGE COMPARTMENT WHEEL ARCH PANEL.
Disconnect plug con
Necessary preliminary tasks
Remove front left UNDERBODY PANELLING
Disconnect plug connection (1).
Gently press retaining tabs apart in direction of arrow and remove RDC aerial
(2).
Fig. 46: Pres
Necessary preliminary tasks
Detach WHEEL ARCH COVER front section at front
Disconnect plug connection (1).
Gently press lugs (2) apart.
Remove RDC sensor (3) in direction of arrow.
Fig. 56: Remo
SEE MORE:
WARNING: If the engine hood/bonnet contact is pulled upwards (workshop
mode),
the information "switch closed" is output. The automatic engine start-stop
function is active.
An automatic engine start is possible.
Observe safety precautions when working on MSA vehicles.
Before carrying out practical
Notes
IMPORTANT: The timing can only be checked with special tool 11 9 900.
The timing may be misinterpreted if it is checked without special tool 11 9 900.
Cylinders 1-4:
Necessary preliminary work
Remove right CYLINDER HEAD COVER
Remove FAN COWL with electric fan
Remove BELT PULLEY for air co