BMW 7 Owners & Service Manuals

BMW 7 Series: Electronic Ride-Height Control (EHC)

Control Unit

The EHC control unit is located in a module carrier in the rear of the luggage compartment on the right-hand side.

Vertical Dynamics Systems
Fig. 132: Identifying Air Supply (LVA) And EHC Control Module On Mounting Bracket


  1. Air supply (LVA)
  2. EHC control module on mounting bracket

The EHC control unit is fully compatible with diagnostics.

The EHC control unit receives the following signals:

  • Vehicle ride height
  • Load cutout signals
  • Terminal 15 ON/OFF
  • Vehicle speed
  • Lateral acceleration
  • "Engine running" signal
  • Hatch status.

The EHC control unit decides on a case-by case basis whether a control operation is required in order to compensate for changes in load.

It is thus possible to optimally adapt the frequency, specified heights, tolerance thresholds and battery load to the relevant situation by means of the control operation.

Air Supply Unit (LVA)

Vertical Dynamics Systems
Fig. 133: Identifying Air Supply Unit Components, Top View


  1. Compressor relay
  2. Electric motor
  3. Air exhaust silencer
  4. Air drier
  5. Electrical connector, 3-pin, for valve manifold
  6. Electrical connector, 2-pin, for electric motor
  7. Component carrier

The air supply unit is mounted at the rear of the vehicle on the trunk floor.

Vertical Dynamics Systems
Fig. 134: Identifying Air Supply Unit Components, Bottom Vie


  1. Electrical connector, 2-pin, for exhaust valve
  2. Air intake line to left rear light unit
  3. Air intake
  4. Valve block
  5. Compressor
  6. Air drier
  7. Air exhaust valve
  8. Air exhaust silencer

Air Suspension

Vertical Dynamics Systems
Fig. 135: Identifying Air Suspension Components


  1. Left air spring strut
  2. Right air spring strut
  3. EHC control unit
  4. Air supply unit
  5. Compressor relay

Ride-height Sensor

Vertical Dynamics Systems
Fig. 136: Identifying Ride-Height Sensor Components


  1. Electrical connector
  2. Sensor housing
  3. Lever

The angle of a pivoting lever is converted into a voltage signal by the ride height sensor. The greater the angle (relative to a defined starting or zero position), the greater is the output voltage. It is generated by a Hall-effect sensor element.


There are always four ride-height sensors fitted on all F01/F02 models.

The ride-height sensors fitted all operate according to the same principle but there are different designs (different part numbers). The reason for the differences are the available space and the starting position (zero position) of the individual ride-height sensors.

Depending on whether or not the vehicle is fitted with Electronic Height Control (EHC), double or single ride-height sensors are fitted on the rear suspension.

On the front suspension, single ride-height sensors are always used.


Vertical Dynamics Systems

Vertical Dynamics Systems


     Cruise Control Systems


    Trusted Driver Assistance Systems BMW has long since offered a comprehensive range of driver assistance systems. These make it easier for the driver to control the vehicle, by providing the driver

     System Overview

    Components in the Vehicle Fig. 137: Identifying DCC, ACC Stop & Go Components, F01/F02 (View From Front) DCC/ACC STOP AND GO SYSTEM COMPONENTS REFERENCE CHART Electronic transmission control m


     Symbols and displays

    Symbols in the Owner's Manual Symbol Meaning Precautions that must be followed in order to avoid the possibility of injury to yourself and to others as well as serious damage to the vehicle. Measures that can be taken to help protect the environment. Texts in vehicle used to select individual funct

     Person warning with City braking function- Switching on/off

    Switching on automatically The system is automatically active after every driving off. Switching on manually Press the button. The menu for the Intelligent Safety system is displayed. If all Intelligent Safety systems were switched off, all systems are now switched on. "Configure INDIVIDUAL": de

    © 2019-2023 Copyright