Description

This steering wheel airbag module is designed for the Peugeot 307 and replaces the original driver airbag assembly. Ideal for professional garages and experienced DIY mechanics, it restores the driver’s frontal passive safety following deployment or electrical failure. The unit is compatible with vehicles using the original part numbers and connectors listed below and should be installed following standard SRS safety procedures.

Technical Information

• Manufacturer: Stellantis (Peugeot/Citroën)
• Model: Peugeot 307
• Product Codes: 96556745ZR, 4112HW
• Additional Numbers: NFP

Compatibility

Primarily intended for Peugeot 307 (first generation). Compatible body types commonly include Hatchback and SW (Estate); may also fit Coupé-Cabriolet variants where the original part number matches. Check the vehicle’s existing part number (96556745ZR / 4112HW) to confirm interchangeability before installation.

Function And Typical Failure Causes

The steering wheel airbag is a central component of the Supplemental Restraint System (SRS). In the event of a qualifying frontal impact it deploys to reduce injury to the driver by rapidly inflating a cushion between the driver and the steering wheel. Typical reasons this part becomes faulty or requires replacement:

• Deployment in a collision – once deployed, the module must be replaced.
• Electrical faults – damaged wiring, corroded connectors or a failed squib can trigger SRS warning lights.
• Clock Spring/Spiral Cable Wear – loss of continuity to the airbag connector due to worn or damaged clock spring.
• Moisture Ingress or Corrosion – exposure to water or road salts can degrade connectors and contacts.
• Age-Related Degradation – electronic components can fail over long service life.

Replacement Procedure (Overview)

Only proceed if you have the appropriate skill level and tools. If unsure, have the work carried out by a professional.

1. Park vehicle on level ground, engage parking brake and ensure ignition is off.
2. Disconnect the negative battery terminal and wait a minimum of 10–15 minutes to allow SRS capacitors to discharge.
3. Set the steering wheel in the straight-ahead position and remove column trim to access airbag fasteners.
4. Remove the airbag retaining fasteners (typically Torx screws accessed from the rear of the steering wheel) and carefully pull the module away from the wheel.
5. Disconnect the airbag squib connector(s) and any horn or control switches according to their locking mechanism; avoid pulling on wiring.
6. Install the replacement airbag, ensuring connectors are fully engaged and locked, then secure mounting fasteners to the manufacturer’s specification.
7. Reconnect the battery, perform SRS diagnostics with a suitable scan tool and clear fault codes. Verify SRS indicator behavior (should extinguish after self-test).
8. Check steering angle and wheel centering; if the clock spring was disturbed, perform calibration as required.

Installation Recommendations

• Always disconnect the battery and follow the manufacturer’s safety intervals before touching SRS components.
• Do not attempt to disassemble the airbag module. If the unit has visible damage or corrosion do not install.
• Use correct tools (Torx bits, insulated tools where appropriate) and follow torque specifications from the workshop manual.
• Ensure the clock spring (spiral cable) is centered before reassembly; incorrect centering can damage the spiral cable when the wheel is turned.
• After fitting, use an OBD diagnostic tool to confirm proper SRS operation and to clear any stored fault codes.
• Dispose of deployed or defective modules in accordance with local regulations for pyrotechnic components.

Why This Part Most Often Fails

Driver airbags most frequently become unusable after vehicle impacts that trigger deployment. Outside of collisions, the common causes are electrical issues such as corroded connectors or damaged wiring, and wear or failure of the steering column clock spring which interrupts the airbag circuit. Environmental exposure (moisture, salts) and long service life can also lead to faults detected by the vehicle’s SRS system.

Note For Professionals And Experienced DIYers

This part is intended for vehicles that originally used the listed part numbers. Always consult the vehicle’s repair manual for model-specific procedures and torque figures. If SRS faults persist after correct installation, further diagnosis of wiring, connectors and related modules (clock spring, crash sensors) may be required.