Description
Supply cable to the START-STOP capacitor for e-HDi engines.
High-quality replacement supply cable designed for the START-STOP capacitor on e‑HDi 1.6 HDi engines. This OE-matching cable (9678697880) restores reliable power transfer between the capacitor and the vehicle electrical system, helping to eliminate intermittent Start‑Stop faults, voltage drops and poor connector contact. Built for use in the demanding engine-bay environment, the cable is suited for Citroën and Peugeot models equipped with factory START‑STOP systems and is an ideal choice for professional workshops and experienced DIY mechanics who search by part number.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4; Citroën C4 II; Citroën C4 Picasso; Citroën C4 Picasso II; Peugeot 3008 I; Peugeot 308; Peugeot 308 T9; Peugeot 5008 I
- Product Codes: 9678697880
- Additional Numbers: No additional OE numbers documented
Function And Application
The cable transmits current between the START‑STOP capacitor and the vehicle electrical network, supporting rapid energy delivery during engine restart events. It is specifically intended for e‑HDi start‑stop systems on 1.6 HDi diesel engines where an auxiliary capacitor is used to stabilize voltage during stop/start cycles.
Typical Failure Modes And Lifespan
There is no fixed replacement interval; lifespan depends on operating conditions. Typical causes of failure include connector corrosion, heat and vibration damage, chafing or insulation wear, water ingress and mechanical strain. Symptoms of a failing cable include Start‑Stop warnings, fault codes related to the energy storage circuit, slow or failed restarts and visible connector overheating or oxidation.
Installation Recommendations
- Always disconnect the battery before starting work and follow the vehicle manufacturer’s safety procedures.
- Locate the START‑STOP capacitor and trace the original cable routing to avoid chafing and heat exposure when fitting the new cable.
- Inspect and clean mating connectors and terminals; replace corroded clamps or grommets to ensure a secure, low-resistance connection.
- Secure the cable using original mounting points or OEM-style clips; avoid sharp bends and proximity to hot components.
- After installation, reconnect the battery and clear any related fault codes. Verify correct Start‑Stop operation and check for error messages on the instrument cluster.
- If the Start‑Stop system still reports faults after cable replacement, diagnose the capacitor, connectors and related sensors with workshop-grade diagnostic equipment.
Why This Part Is Replaced Most Often
Cables in the engine bay are exposed to heat, vibration and contaminants. Over time this leads to insulation degradation, connector corrosion and loosening of contacts. Environmental factors (road salt, moisture) and mechanical damage (abrasion, rodent attack) accelerate failure. Replacing the cable with the correct OE-coded part helps restore reliable Start‑Stop performance and prevents secondary damage to the capacitor or electrical components.
