SR Suntour HESC 4-Pin Torque Sensor for Carrera & Raleigh E-Bikes

Not sure if your torque sensor is faulty? Read our full diagnostic guide here.

SR Suntour HESC 4-Pin Torque Sensor for Carrera & Raleigh E-Bikes

If your Carrera or Raleigh e-bike has stopped providing pedal assist — or is showing an E21 or E22 error — this is the part you need. The SR Suntour HESC torque sensor (also called a crank sensor) is the most common cause of these faults, and replacing it gets most bikes back on the road. This is the 4-pin version, fitted to most pre-2021 HESC systems.

Compatibility

• Carrera models (typically pre-2021): Crossfire-e, Vulcan-e, Vengeance E, Subway E
• Raleigh models: Selected models using SR Suntour HESC drivetrain with 4-pin connector
• Suitable for SR Suntour HESC systems using the 4-pin ATS connector
• Not compatible with post-2021 models that use the 6-pin connector — check your connector before ordering

Specifications

• 4-pin connection
• ATS torque sensor unit
• Fits 38T / 42T / 48T chainsets

Common Signs You May Need This Sensor

• Pedal assist not working correctly
• Intermittent power or cut-outs while riding
• Reduced or inconsistent pedal response
• Physically damaged torque sensor

Why Choose This Sensor?

• Fixes E21 and E22 errors — the most common fault on pre-2021 Carrera and Raleigh HESC systems
• Gets your bike working again — customers consistently report pedal assist restored after a straightforward swap
• Genuine SR Suntour part — exact OEM replacement, not an aftermarket copy
• Easy to fit — no specialist tools required; customers describe the installation as straightforward
• Cheaper than a workshop repair — a fraction of the cost of a manufacturer service or new crankset

Not sure which version you need? Use our diagnostic guide or contact us, and we will confirm compatibility for your model.

Order today — dispatched within 1 working day.

Compatible Bikes (4-Pin / Pre-2021 HESC Models)

Carrera Crossfire E, Carrera Vengeance E, Carrera Subway E, Carrera Vulcan E (typically 2018–2020 models). Raleigh Motus, Raleigh Array, Raleigh Stow-E-Way (pre-2021 models). All models use the SR Suntour HESC system with a 4-pin torque sensor connector.