High-quality intermediate steering shaft (with universal joints) designed for Citroën C1 and Peugeot 107. This replacement part restores precise steering input, reduces play and eliminates knocking or vibration coming from the steering column. Ideal for professional mechanics and DIY enthusiasts who search by part number (4103J7). Compatible with original Citroën/Peugeot steering assemblies up to 2014 and built to meet OE fitment standards.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C1; Peugeot 107 (up to 2014)
• Product Codes: 4103J7
• Other Numbers: None specified

Function And Features

• Transfers steering torque from the steering wheel to the steering rack while accommodating angular movement via universal joints.
• Designed to maintain steering precision and to tolerate slight misalignment between column and rack.
• Rigid construction to minimize play and vibration; includes universal joints sized for Citroën/Peugeot application.

Signs Of Failure And Typical Causes

• Symptoms: Excessive play in the steering wheel, knocking or clunking during steering, vibration at low speeds, or uneven steering feel.
• Common Causes: Wear of universal joint bearings, corrosion of splines or joints, loss of clamp torque, impact damage (accident) or long-term fatigue from mileage and exposure to moisture/road salt.
• Service Life: Varies with use and environment; often reliable for many tens of thousands of kilometres but should be inspected if any of the above symptoms appear.

Replacement Guide

1. Park vehicle on level ground, engage handbrake and secure wheels.
2. Disconnect the negative battery terminal and wait at least 10 minutes to allow system capacitors to discharge before working on the steering column or components near the airbag system.
3. Set steering wheel to straight-ahead position and lock steering column if applicable.
4. Remove lower dash/column trim to access the steering shaft couplings and intermediate shaft.
5. Loosen and remove retaining bolts/clamps on both couplings (column side and rack side). Carefully note the orientation and spline index to preserve alignment.
6. Withdraw the old shaft assembly and inspect mating splines, clamps and surrounding seals for damage or corrosion.
7. Install the new shaft, aligning splines and ensuring correct engagement depth; tighten fasteners to the manufacturer’s torque specifications.
8. Reassemble trims, reconnect battery and verify steering operation. Check for absence of play, unusual noises and confirm steering wheel returns to center. If required, perform wheel alignment.

Installation Recommendations

• Always follow vehicle manufacturer procedures and torque values when tightening fasteners.
• Replace any damaged clamps, locking bolts or worn splines rather than reusing suspect hardware.
• Inspect surrounding components (steering rack boots, column bearings, tie rods) and address any related wear to prevent repeated failures.
• After installation, check steering wheel alignment and road test at low speed before normal use.

Why This Part

This steering column shaft (4103J7) offers OE-compatible fitment for Citroën C1 and Peugeot 107 models up to 2014. Its rigid construction and factory-style universal joints restore steering precision and improve driving comfort—making it a reliable choice for workshop repairs and quality DIY maintenance.

Direct-fit electric power steering column compatible with Citroën C1, Peugeot 107 and Toyota Aygo. This steering column assembly replaces the original unit identified by part numbers 45250-0H011-00, 995-10500 and code 4123AV, offering correct mounting points and electrical interfaces for the listed models. Ideal for professional workshops and DIY mechanics looking for a reliable replacement that restores steering assistance and driving comfort.

Technical Information

• Manufacturer: JTEKT / Denso / Koyo
• Model: Citroën C1; Peugeot 107; Toyota Aygo
• Product Codes: 45250-0H011-00
• Other Numbers: 995-10500; 4123AV

Function and Benefits

The electric power steering (EPS) column integrates the steering shaft, power-assist motor/sensor assembly and the column mounting structure. It provides variable steering assistance based on vehicle speed and driver input, improving low-speed maneuverability and high-speed stability. Replacing a faulty column restores smooth steering feel, eliminates steering-assist faults and removes related dashboard warnings.

Installation Recommendations

Follow these guidelines to ensure safe and correct installation:

1. Disconnect the vehicle battery and wait the manufacturer-recommended interval before starting work to prevent airbag deployment and electrical damage.
2. Mark the steering wheel position relative to the spline to preserve alignment. Remove the steering wheel, airbag module and surrounding trim panels as required.
3. Unplug all electrical connectors to the column (sensors, switches and power supply) and remove any intermediate covers.
4. Unbolt the column from the dash and subframe mounting points, then withdraw the assembly carefully.
5. Install the replacement column in reverse order. Use manufacturer torque specifications for all fasteners and ensure connectors are fully engaged.
6. After installation, perform steering angle sensor calibration and any required electronic initialisation with an appropriate diagnostic tool to clear fault codes and ensure correct EPS behavior.

Most Common Failure Causes

• Wear Or Failure Of Torque/Position Sensors Causing Erratic Assistance Or Fault Codes.
• Motor Or Electronic Module Failures Due To Age, Heat Or Moisture Ingress.
• Connector Corrosion Or Damaged Wiring Leading To Intermittent Operation.
• Mechanical Damage From Collisions Or Excessive Steering Loads Affecting Column Integrity.
• Faults After Improper Service Or During Airbag/Steering Removal If Battery Was Not Disconnected.

Advice For Workshops And DIY Mechanics

Workshops should check for related fault codes and inspect steering linkage and suspension for secondary damage. For a reliable outcome, ensure correct steering angle calibration and road test the vehicle under varied conditions. Because steering is a critical safety system, follow all safety procedures and manufacturer’s service instructions during replacement.

Part numbers 45250-0H011-00, 995-10500 and 4123AV are commonly used when searching for compatible units; include them in searches to find the correct replacement quickly.

Direct-fit electric power steering column designed as a replacement unit for Citroën C1, Peugeot 107 and Toyota Aygo. This unit is supplied by well-known OEM manufacturers (Jtekt, Denso or Koyo) and is a common service part for workshops and DIY mechanics who need a reliable solution for loss of power assist, unusual steering noise or intermittent electrical faults. The part is often searched for by its product codes, so see the Technical Information section below for all relevant references.

Key Features

– Electric power assistance integrated into the steering column for compact installation and improved packaging compared with hydraulic systems.
– OEM-level components from Jtekt, Denso or Koyo depending on supply batch.
– Direct replacement for factory-fit columns on compatible models — no modifications to the steering rack required when correctly fitted.
– Ideal for professional garages and experienced home mechanics familiar with SRS and electrical systems.

Application

Compatible with the steering systems of the following cars: Citroën C1, Peugeot 107, Toyota Aygo. Check the product codes in the Technical Information to match the exact variant used on the vehicle.

Technical Information

• Manufacturer: Jtekt / Denso / Koyo
• Model: Citroën C1, Peugeot 107, Toyota Aygo
• Product Codes: 45250-0H010-00, 45250-010-00, 995-10500
• Other Numbers: 4123AV, 4123S8

Installation Recommendations

Careful installation is essential for safety and correct operation. Recommended general procedure:

• Disconnect the battery and wait for the vehicle manufacturer recommended time to allow SRS capacitors to discharge.
• Observe all airbag and SRS safety procedures. Remove the airbag and steering wheel only if you are trained to do so.
• Mark steering wheel position relative to the shaft to preserve wheel alignment. Ensure the front wheels are in straight-ahead position before disassembly.
• Remove lower dash/trim panels to access column mounting bolts and electrical connectors.
• Disconnect column electrical connectors and remove mounting bolts. Remove the old column carefully and fit the replacement unit in reverse order.
• Transfer any vehicle-specific parts (ignition barrel/lock, trim pieces) if required by the vehicle’s design.
• Tighten all fasteners to the vehicle manufacturer’s torque specifications and reconnect electrical connectors securely.
• After installation, perform required diagnostic checks and calibrations — for example steering angle sensor and EPS initialization — using an appropriate diagnostic tool.
• Carry out a careful road test to verify assist function, absence of noise and proper steering wheel alignment.

Most Common Failure Causes

Electric steering columns combine mechanical and electronic parts; the most frequent causes of failure are:

• Electrical faults: damaged connectors, corroded wiring or intermittent contact in the column harness.
• Torque sensor or motor failures: wear or electronic faults in the torque/torque-sensor assembly can cause loss of assist or error warnings.
• Water ingress or contamination: moisture can damage electronics inside the column, especially after front-end impacts or poor sealing.
• Mechanical wear or impact damage: collisions, heavy use or improper handling during removal/installation can damage bearings, joints or the column body.
• Clock spring/Airbag connector issues: related components can create warning lights or steering faults that appear to come from the column.

Why Choose This Part

This electric power steering column is supplied by established OEM component manufacturers and offers a reliable replacement path for vehicles exhibiting EPS faults. It is suitable for professional fitting and for experienced DIY mechanics who follow safety and diagnostic procedures. Because many customers search by product code, the included references make it easier to confirm fitment quickly.

Notes

Do not attempt repair or modification of the internal electronics unless you are qualified. Always adhere to the vehicle manufacturer’s safety instructions when working with steering and SRS systems.