Hard Top Lock Hall Sensor (S164 Switch, Hard Top Recognition)

The hard top recognition hall sensor is positioned on the left hard top lock. It receives power and ground from the CVM and provides a high signal input when the hard top is installed on the vehicle. The connector on the top of the lock is used as the power and ground supply for the rear window defroster of the hard top.

The CVM uses the input signal of the hall sensor to lock out soft top operation while the hard top is installed.

Fig 1: Locating Hard Top Lock Hall Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: View Of Hard Top Lock Hall Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Circuit Diagram - Hard Top Lock Hall Sensor

Courtesy of BMW OF NORTH AMERICA, INC.