Product Description

This battery negative/ground cable is designed for the Start-Stop capacitor on e-HDi engines. It provides the negative return path between the capacitor and the vehicle electrical system, ensuring reliable high-current transfer during frequent engine stop-start cycles. The part is an OEM-style replacement carrying the original references used on Citroën and Peugeot vehicles with e-HDi technology.

Key Benefits

• Direct fit for specified Citroën and Peugeot models—keeps Start-Stop system functioning reliably.
• Durable construction to withstand vibration, heat and frequent current pulses from Start-Stop operation.
• Restores proper grounding and reduces voltage drop during engine cranking, improving starter and capacitor performance.

Fitment / Compatible Models

Commonly fitted to vehicles with e-HDi engines, including:

• Citroën C4 II
• Citroën C4 Picasso
• Peugeot 308

Installation Recommendations

Intended for professional fitters and experienced DIYers. Typical replacement procedure:

• Safety First: Disconnect the battery negative terminal before any work to avoid short circuits or damage to electronic modules.
• Locate The Cable: Access the Start-Stop capacitor and follow the negative lead path to the battery or ground point—remove any covers as required.
• Remove Old Cable: Loosen and remove terminal bolts/clamps. Inspect connectors and surrounding wiring for corrosion or damage.
• Prepare Connection Points: Clean mating surfaces and remove oxidation. Replace corroded clamps or fasteners if necessary.
• Fit New Cable: Route the new cable avoiding sharp edges and hot components. Secure clamps and fasteners; apply dielectric grease to terminals to slow future corrosion.
• Restore Power: Reconnect the battery and verify Start-Stop system behavior and charging system operation. Clear any related fault codes if present.

Why This Part Fails

The most common causes of failure are:

• Corrosion at terminals and clamps caused by moisture and road salts, increasing resistance and heat.
• Thermal Degradation: Proximity to exhaust or engine heat can harden insulation and expose conductors.
• Mechanical Wear: Vibration and chafing can break strands or damage terminations over time.
• Increased Load From Start-Stop Cycles: Frequent high-current pulses accelerate connector and conductor wear compared with conventional systems.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 II; Citroën C4 Picasso; Peugeot 308
• Product Codes: 9674241880; 5638PJ
• Additional Numbers: NFP

Practical Tips

• Always replace corroded clamps or fasteners rather than reusing them—good mechanical connection is essential.
• Secure routing to avoid heat and abrasion; use original clips or equivalent fasteners to prevent movement.
• After replacement, check for charging voltage stability and confirm the Start-Stop system engages and disengages correctly.

Recommended Professional Advice

If you are unsure about access, routing or fault codes related to Start-Stop operation, have the replacement performed by a technician with experience in PSA electrical systems to ensure correct installation and long-term reliability.