Sound Systems: Notes

Two different sound systems were available for the E46 at the start of production. The standard radio features the in-dash cassette player and the optional radio has a single in-dash CD player. Both radios are prewired for the optional CD changer that mounts in the trunk.

Fig 1: Identifying Sound Systems (Type 1)

Courtesy of BMW OF NORTH AMERICA, INC.

The sound systems for the E46 continue with the integration feature introduced with the E38. The sound system is interconnected on the K-Bus for amplifier and MFL communication.

Theft proofing of the radio via a code is no longer required as the radio will not function without the K-Bus connection and a valid K-Bus signal from the instrument cluster.

Fig 2: Identifying Sound Systems (Type 2)

Courtesy of BMW OF NORTH AMERICA, INC.