Bosch S3 Connect Module Kit [smart system]

The Bosch Smart System (also known as System 3) is compatible with the Connect Module Though all bikes with Bosch Smart Systems are compatible with the Connect Module, many do not come with it installed as a stock item. 
Perennial Cycle has installed several of these in a variety of e-bikes. Sometimes there isn't space for them under the motor cover (early Riese & Muller Load's are an example...though current(2024-current) Loads have a motor cover that will fit the Connect Module). If the motor cover that came with the bike doesn't fit the Connect Module, the bike's manufacturer likely has one available that will.
When combined with a subscription to the Bosch Flow+ app you can use an alarm on your bike when leaving it. Also the Connect Module has GPS tracking.
Subscribe to Flow+ and get access to the eBike Alarm premium service. Combine both. As soon as you switch off your eBike, eBike Alarm will activate automatically, giving your eBike better protection against theft.

There are 2 variations of the Connect Module. They use the same technology, but have different mounting kits.

MODEL:
 - BDU37YY: This module is designed for the Cargo Line, Performance Line Speed, Performance Line CX, Performance Line CX Race motors. Connect Module w/rubber end cap, screw and S3 conection wire

 - BDU33YY: This module is designed  for the Active Line, Active Line Plus, Performance Line, Performance Line Sport motors. Connect Module w/backing plate mount, screw and S3 connection wire.