Description
Battery Power Steering Protection Unit For Citroën And Peugeot Vehicles
Description
This fuse/protection module controls and protects the battery feed to the electric power steering system on a range of Citroën and Peugeot models. Ideal for professional workshops and experienced DIY mechanics, this unit is often searched and ordered by its part numbers (e.g. 9666527580, 28236841, 6500GQ). The module prevents overloads and short circuits on the steering power supply, ensuring reliable assistance and protecting downstream wiring and components.
Key Benefits
- Direct replacement for original Stellantis parts: restores proper power supply protection to the electric steering circuit.
- Saves diagnostic time when replacing a faulty fuse module that causes intermittent or total loss of power steering assistance.
- Designed for fast installation in workshop environments, reducing vehicle downtime.
How It Works
The module monitors and protects the main battery feed to the electric power steering motor and associated relays/fuses. On electrical faults such as short circuits, thermal overload or high current draw, the module interrupts the feed to prevent damage. Proper function is crucial for safe steering assistance and stable vehicle behavior.
Installation Recommendation
Recommended For: Professional Mechanics And Competent DIYers.
- Always disconnect the negative battery terminal before starting work to avoid short circuits and prevent damage to electronic modules.
- Locate the fuse/protection module—typically mounted in the engine bay power distribution/junction box near the battery or on the inner wing. Remove any protective covers.
- Label and disconnect electrical connectors and any linked fuses/relays. Use appropriate trim tools to avoid damaging locking tabs.
- Remove mounting screws or clips, extract the faulty module and replace with the new unit. Ensure mating surfaces are clean and connectors fully seat until the locking tabs engage.
- Reinstall covers, reconnect the battery and perform a basic check: ignition on, verify power steering assist operation and absence of warning lamps. If faults persist, check for wiring shorts or blown fuses before replacing additional components.
- Use a multimeter to verify battery feed and ground continuity if symptoms continue. Follow manufacturer torque and reassembly specs where available.
Why This Part Fails Most Often
Common causes of failure include water ingress and corrosion of connector pins, thermal stress from high current events, vibration fatigue of solder joints or internal components, and damage from previous electrical faults (overcurrent or shorts). Poor battery condition or alternator issues that cause voltage spikes can also shorten the module’s life. Symptoms of failure typically include intermittent or total loss of power steering assistance, blown fuses related to the steering circuit, and steering warning lights on the dash.
Typical Service Life
There is no fixed interval for replacement; expected life depends on vehicle use, environmental exposure and the electrical system condition. Modules on vehicles exposed to moisture, salt or frequent short-power events tend to fail earlier. Inspect connectors and harness insulation during regular service intervals to detect early corrosion or damage.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4; Citroën C4 II; Citroën C4 Picasso; Peugeot 3008 I; Peugeot 308; Peugeot 5008 I
- Product Codes: 9666527580, 28236841, 6500GQ
- Other Numbers: 6500.GQ, 28236841
Notes For Installation And Diagnostics
When replacing this module, also inspect the related fuses, wiring harness and steering motor connector for signs of overheating or damage. If a short or repeated fuse blowing is present, locate and repair the underlying fault before installing a new module. After replacement, verify correct operation of the power steering under several driving conditions and re-check for stored fault codes with a diagnostic tool.
Suitable For Professionals And Experienced Enthusiasts
This part is intended for workshops and skilled DIY mechanics who have experience with vehicle electrical systems and safety procedures. Because the unit manages high-current circuits, adhere to safe working practices and use proper tools when diagnosing and replacing the module.
