models from the E65 on,it is the first time for BMW to use fibre-optic cables as the standard for communication between control units.

The optical buses are notable for their high data transmission rate and they are not susceptible to electromagnetic interference. The optical buses in question are the MOST bus, primarily used for in-car entertainment electronics, and the byteflight bus, which serves predominantly safety-critical functions.

OPPS has been designed for encoding, individualising and programming ( CIP) via the Software Service Station (SSS) and envisaged for use as part of the BMW diagnosis Information system (DIS) from DISPlus and Group Test One (GT1). It is intended for testing and programming tasks from the E65 series, taking the place of the diagnostic head.