Bafang Speed Sensor 4 Pin - Fit for BAFANG Motor M400 M620 G510 G330 M420
Product Description This BAFANG Speed Sensor is a precision accessory designed for electric bikes equipped with BAFANG mid-drive unit. It accurately detects wheel rotation and sends real-time speed data to...
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Bafang Speed Sensor 4 Pin - Fit for BAFANG Motor M400 M620 G510 G330 M420
Product Description
This BAFANG Speed Sensor is a precision accessory designed for electric bikes equipped with BAFANG mid-drive unit. It accurately detects wheel rotation and sends real-time speed data to the motor controller, ensuring smooth PAS (Pedal Assist) performance, proper speed display, and reliable system operation.
Compatible with CAN 4-pin connectors and includes the speed sensor and magnet, making installation fast and straightforward.
Key Features
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Compatible with BAFANG systems including popular models such as M620, G510, and G330.
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Available in CAN 4-pin version to match your motor controller.
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High-precision speed detection for accurate speed display and PAS control.
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Easy installation with a wheel magnet.
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Durable and reliable design, suitable for daily riding and all weather conditions.
Why You Need It
A faulty speed sensor can cause speed readout issues, PAS malfunctions, or motor cut-outs. Replacing it with a new BAFANG-compatible unit restores accurate speed data and ensures smooth, predictable motor assistance. It’s an essential component for maintaining the performance and safety of your e-bike.
Installation Notes
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Ensure your motor uses a matching CAN 4-pin connector.
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The wheel magnet must pass close to the sensor (max 10 mm gap) for proper detection.
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After installation, verify that speed, distance, and PAS functions are working correctly.





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