Description
Electric power steering column by JTEKT, Denso or Koyo. For Citroën C1, Peugeot 107 and Toyota Aygo. Tested, fully functional.
This electric power steering column is a direct-fit replacement commonly used on Citroën C1, Peugeot 107 and Toyota Aygo models. It restores precise, assisted steering response and eliminates play or intermittent assistance faults caused by worn internal components or electrical failures. Ideal for professional workshops and DIY mechanics who search by product number (e.g. 45250-0H010-00, 995-10500), this unit helps return the vehicle to safe, predictable handling while keeping repair time and cost efficient.
Technical Information
- Manufacturer: JTEKT / Denso / Koyo
- Model: Citroën C1, Peugeot 107, Toyota Aygo
- Product Codes: 45250-0H010-00, 995-10500
- Other Numbers: 4123AV, 4123S8
Function And Benefits
The electric power steering column integrates the steering shaft assembly with the assistance motor and torque sensing components. It provides variable steering assistance depending on vehicle speed and driver input, improving maneuverability at low speeds and stability at higher speeds. Replacing a faulty column restores precise steering feel, reduces effort at the wheel, and clears related fault codes that can disable assistance.
How Replacement Is Performed
- Disconnect the vehicle battery and wait according to manufacturer recommendations to disable the airbag system.
- Remove the steering wheel and driver airbag following safe procedures.
- Remove column trim panels and disconnect electrical connectors (stalks, ignition switch, motor/torque sensor harness).
- Mark steering wheel/shaft alignment to preserve wheel center position, then unbolt the universal joint and column mounting points.
- Fit the replacement column, ensuring correct spline alignment, reconnect all connectors and secure mounting fasteners to the manufacturer torque specification.
- Reconnect the battery, clear any diagnostic trouble codes and perform steering angle sensor calibration if required.
Installation Recommendations
- Always Disconnect Battery Before Work: Prevents accidental airbag deployment and protects electronic components.
- Preserve Steering Alignment: Mark the position of the steering wheel relative to the shaft splines before removal to avoid misalignment and re-centering issues.
- Follow Manufacturer Torque Specs: Tighten column and universal joint fasteners to the specified torque values to ensure safety and avoid thread damage.
- Inspect Electrical Connectors And Wiring: Replace or repair any corroded or damaged wiring to prevent intermittent faults.
- Perform Post-Installation Checks: Clear fault memory, verify assistance operation at low speeds, and carry out steering angle calibration if the vehicle’s systems require it.
Most Common Failure Causes
- Electrical Faults: Damaged wiring, corroded connectors or failed motor/torque sensor can cause loss of assistance or warning lamps.
- Wear And Mechanical Damage: Internal wear, bearing play or damage from impacts and accidents leads to increased play and noise.
- Water Ingress And Corrosion: Moisture entering the column assembly accelerates electrical and mechanical deterioration.
- Battery/Voltage Issues: Low voltage spikes or repeated battery disconnects can cause electronic component failure or faults in sensors.
- External Damage From Airbag Deployment Or Collision: Deployed airbag events and collisions can deform or damage the column and associated electronics.
This unit is suitable for technicians and experienced DIYers who can follow safety procedures for airbag and steering system work. The presence of original product codes (45250-0H010-00, 995-10500, 4123AV, 4123S8) makes it easier to locate the correct fitment when searching online or cross-referencing parts catalogs.
