BAFANG M400 Max Drive Controller UART Protocol 36V 250W Mid Motor Replacement

This genuine replacement controller is exclusively developed for BAFANG M400 Max Drive (G330) mid-mounted e-bike motor, adopting UART serial communication protocol, rated at 36V 250W continuous power, perfectly matching original factory wiring and logic。

✅ UART Protocol Exclusive Match

Marked with “U” identifier on the controller housing, equipped with female EB-BUS connector and 5-pin round display port, only compatible with UART protocol displays; no motor calibration needed after replacement, different from CANbus version。

✅ Exact OEM Replacement

Direct plug-and-play installation, no wiring modification or parameter tuning required, perfectly fits original M400 mid drive crank motor assembly.

✅ Stable 36V/250W Power Output

Max continuous current 16A, optimized circuit layout with reliable heat dissipation, steady torque output for daily commuting and light climbing rides, low failure rate for long-term use。

✅ Compatible Model Confirmation

Applicable motor: BAFANG M400 Max Drive / G330 mid drive motor

Electrical spec: 36V lithium battery input, 250W rated power

Communication: UART (NOT CANbus version, cannot cross-use)

1 × BAFANG M400 Max Drive 36V 250W UART Controller