Labelling of generation 2.3 wheel electronics

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Transmission frequency of electronic wheel module
Large Torx socket screw
BMW part number
Tightening torque of Torx screw and union nut
Width across flats of union nut
Serial number of wheel electronics
Production date of wheel electronics

Fig 1: Identifying Labels On Gen2.3 Wheel Electronics
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The following illustrations only show removal and refitting of the 3rd generation wheel module. The instructions also apply without alteration to the wheel module SP303.