Wheel Structure With Integrated Support Ring

Emergency Running System With Integrated Support Ring 

Fig 1: Identifying Support Ring And Tyre

Courtesy of BMW OF NORTH AMERICA, INC.

1. Tyre
2. Support ring

Installation Location Of RDC Wheel Electronic Unit 

Fig 2: Identifying Wheel Electronic Unit And Support Ring

Courtesy of BMW OF NORTH AMERICA, INC.

1. Wheel electronic unit
2. Support ring

For further information on the subject of "Tyre pressure warning systems and tires with emergency running characteristics", please refer to the vehicle Owner's Handbook. 

A Parts Information bulletin will be published with information on how to order parts. 

Functional and system descriptions are not subject to change. Parts availability and immediate ordering availability cannot be derived from this information. The specialized departments will inform the markets with further details at the appropriate time.