Stator Bafang BBS02 750W — Genuine Replacement Motor Core for Mid-Drive E-Bikes

What is a stator and why does it matter?

Inside every Bafang BBS02 mid-drive motor, the stator is the stationary component wrapped in copper windings that generates the rotating magnetic field powering your ride. It works in tandem with the rotor — together they are the beating heart of your conversion kit. The stator also houses the Hall effect sensor board, which communicates rotor position to the controller in real time. If those Hall sensors fail, your display will typically show an error code (commonly E30H), and the motor will cut out or behave erratically.

A stator replacement is the targeted fix for this exact failure mode. Rather than spending significantly more on a complete Bafang BBS02 motor, this genuine-spec stator gives you everything you need to restore full performance.

Key features at a glance

What’s included in the box

• Stator assembly with copper windings
• Integrated Hall effect sensor board
• Stator magnets
• Motor core gasket
• 3-phase wire rubber seals

Who is this for?

This replacement stator is the right part whether you are a seasoned DIY e-bike builder or a workshop technician maintaining a fleet of converted bikes. If you are new to e-bike repairs, we recommend pairing this purchase with a visit to our e-bike guides and tutorials — or booking a professional installation at our Cardiff service centre.

• Your BBS02 is showing an E30H Hall sensor error on the display
• The motor has lost power progressively or cuts out under load
• You can smell burning from inside the motor casing
• You have opened the motor and confirmed visible winding damage
• You want to rebuild a second-hand BBS02 to full specification

How to install a Bafang BBS02 stator

Replacing the stator requires opening the BBS02 casing, which involves removing the outer shell, gearbox cover, nylon planetary gear, and pinion gear before accessing the motor core. While this is achievable for confident DIYers with the right tools, it does require care — particularly when reseating the Hall sensor board and routing the three-phase wiring correctly.

We recommend reading our step-by-step guide on how to maintain and repair a Bafang mid-drive motor before starting. If you are unsure, our Cardiff workshop team offers a dedicated Bafang mid-drive service and repair — just bring your bike in or get in touch.

Compatible parts — complete your repair

While you have the motor open, it is worth checking the condition of the rotor, gears, and controller. Here are the parts most commonly replaced alongside this stator:

Why buy from All4eBikes?

All4eBikes is a UK-based specialist in electric bike parts, conversion kits, and accessories — with a physical store in Cardiff and a team that rides and repairs e-bikes every day. Every part we stock is selected for real-world performance, not just spec-sheet numbers. Orders are dispatched within 1–2 working days, and free UK delivery applies to orders over £19.90.

If you are unsure whether this stator is the right fix for your motor, contact us via our contact page or drop us a WhatsApp — we are happy to help you diagnose the fault before you spend a penny.

Frequently asked questions