Bafang Speed Sensor Cable Kit, 3PIN UART / 4PIN CAN, Ebike Speed Sensor with Magnet for M300 M400 M420 M500 M510 M620 Mid Motor

Bafang E-bike Speed Sensor Cable Kit, 3PIN UART / 4PIN CAN

This Bafang speed sensor assembly is a direct replacement spare part for Bafang M-series mid-drive e-bike motors. It detects wheel rotation speed and feeds real-time speed data back to the motor controller, maintaining correct power assist, speed limit and display speed readings. Two versions available: 3PIN for UART protocol and 4PIN for CAN protocol, with different pinout and plug design.

Compatibility

✅ Compatible Motors: M300, M400, M420, M500, M510, M620

Commercial M name ↔ G technical platform reference

• M300 = G360
• M400 = G330
• M420 = G332
• M620 = G510

⚠️ Version Selection Guide. UART and CAN plugs are NOT interchangeable. Confirm your motor protocol and plug type before order.

• 3PIN = UART protocol
• 4PIN = CAN protocol

Precise Specifications

Package Includes

1 × Speed Sensor Cable 1 × Speed Sensor Magnet 1 set of mounting hardware (Screws, metal fastener, rubber cap)

Key Features

✅ Accurate Speed Detection: Captures wheel rotational speed to feed real-time speed data to the Bafang motor controller, ensures normal assist and speed display.

✅ Two Protocol Options: 3PIN UART and 4PIN CAN versions with dedicated plugs, select according to your motor communication system.

✅ Full Kit Ready to Install: Complete assembly includes sensor cable, magnet and all required mounting parts, direct swap for failed original sensor.

✅ Durable Construction: Flexible rubber cable for vibration resistance, metal magnet and fasteners for long service life under ebike riding conditions.

✅ Common Fault Repair: Ideal replacement to fix problems like no speed reading, intermittent speed, incorrect speed value and sudden power cut.

Specifications

Product Name: Bafang Ebike Speed Sensor Cable Kit Versions: 3PIN(UART) /4PIN(CAN) Material: Rubber + Metal Weight: ~50g Application: Wheel speed signal detection for Bafang M-series mid motor Package Contents: Speed sensor cable, magnet, mounting hardware set

Important Notes

• Confirm protocol (UART/CAN) and plug pin count before purchase. 3PIN and 4PIN cannot be cross-used.
• Minor color difference may exist due to screen and lighting.
• Slight manual measurement tolerance is allowed.
• Proper installation gap between sensor and magnet is required to get stable speed signal.

Perfect replacement spare part for ebike repair shops and DIY e-bike builders, repairing speed sensor faults for Bafang M-series mid drive systems.