Tire Monitor System - 3rd Generation System Information
SI B 36 03 09
Wheels and Tires
March 2010
Technical Service
SUBJECT
Third Generation Tire Pressure Monitor System (RDC)
MODEL
E90, E91, E92, E93 (3 Series) from 9/09 production
INFORMATION
As of September 2009 production, a new generation Tire Pressure Monitor System has been introduced for all 3 Series models. Although the basic
operation of the system is similar to the previous version, there are several key differences between the two systems.
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 315
The new system consists of five components:
^ One central antennae with an integrated control module (5) mounted in the right rear wheel arch
^ Four wheel electronics (1-4) mounted at the base of each tire valve.
Central antennae with integrated control module
The control module and central antennae have been combined in a single housing. This new control module has the ability to send request for
information to each of the 4 wheel electronics via a low frequency single (125 kHz). This eliminates the need for separate transmitters, as used for
previous systems.
New style wheel electronics
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 316
The wheel electronics consist of plastic housing with integrated circuitry. The following items are contained within the wheel electronics:
^ Pressure sensor
^ Temperature sensor
^ Acceleration sensor
^ Transmitter/receiver unit
^ Self-diagnosis controller
^ Battery
The following points should be considered when diagnosing and/or servicing the system:
^ The system components are not interchangeable or compatible with previous versions.
^ The type of wheel electronic fitted can only be determined via visual inspection.
^ The detection of low tire pressure and the subsequent warning is similar to the previous design.
^ The reset procedure has changed.
Special Note for Reset Procedure
After initiating a reset, the vehicle must be driven for a period longer than 12 minutes with a vehicle speed which exceeds 19 mph (~30 km/h).
