This air conditioning pipe is designed for PSA vehicles equipped with the 1.6 e-HDi engine family. It is a direct-fit refrigerant line used in the vehicle’s A/C circuit and commonly searched for by original part numbers. Robust construction ensures reliable routing of refrigerant between system components while maintaining system pressure and sealing at connection points.

Ideal for professional workshops and DIY mechanics, this AC pipe is suitable when diagnosing poor cooling, visible oil stains at pipe connections, or audible hissing from the refrigerant circuit. Replacing a damaged or leaking pipe restores refrigerant integrity and avoids further damage to compressor and other A/C components.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 II; Peugeot 308; Peugeot 3008; DS4 (1.6 e‑HDi)
• Product Codes: 9670651880; 6477Z9
• Additional Numbers: 6477Z9; 9670651880

Installation Recommendation

• Recover refrigerant from the A/C system using certified equipment and following local regulations—never vent refrigerant to atmosphere.
• Inspect mounting points, clamps and adjacent hoses for abrasion or damage. Replace worn O‑rings and seals at every connection to ensure leak‑free joints.
• Lubricate new O‑rings with the correct refrigerant oil before assembly and tighten fittings to manufacturer guidelines.
• After installation, evacuate the system with a vacuum pump to remove air and moisture, then recharge the system to the vehicle manufacturer’s specification and perform a leak test.
• If unsure, have the replacement performed by a workshop with A/C service equipment to guarantee correct evacuation, oil charge and refrigerant fill.

Most Common Failure Reasons

• Corrosion and material fatigue at joints and bends, especially in regions exposed to road salt or moisture.
• Abrasion from contact with other components or routing that allows chafing over time.
• Damaged or hardened O‑rings and seals leading to slow leaks.
• Impact from road debris or improper previous repair/installation that stressed fittings.

Common search terms: “9670651880”, “6477Z9”, “Citroën C4 II AC pipe”, “Peugeot 308 AC line”, “AC pipe 1.6 e‑HDi”—use these references when sourcing the correct replacement for fast identification.

Replacing a leaking A/C pipe promptly prevents refrigerant loss, maintains compressor lubrication and restores full cooling performance. For safety and compliance, always handle refrigerant systems with appropriate tools and certification.