Description
Air conditioning pipe for Citroën C4 and Peugeot 307 with 1.4 16V, 1.6 16V and 2.0 16V engines.
High-quality air conditioning (AC) pipe designed to restore reliable refrigerant flow and prevent leaks on Citroën C4 and Peugeot 307 models. Ideal for professional workshops and experienced DIY mechanics, this replacement line fits multiple OEM references including 9657451280 and 6460QL. Replacing a damaged AC pipe restores system pressure, improves cooling performance and eliminates contamination risks that can damage the compressor or other HVAC components.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4, Peugeot 307
- Product Codes: 9657451280, 6460QL
- Other Numbers: 9650628180, 9647878780
- Engine Compatibility: 1.4 16V, 1.6 16V, 2.0 16V
- Typical Refrigerant: R134a (common for these model generations)
Function And Application
The pipe transports refrigerant between HVAC components (compressor, condenser, evaporator, receiver/drier or accumulator) and is a pressure-bearing part of the AC circuit. It ensures sealed flow of refrigerant and lubrication oil; a properly functioning pipe is essential to maintain system pressure and cooling efficiency.
Installation Recommendations
- Recover refrigerant using certified recovery equipment before removal—do not vent refrigerant to atmosphere.
- Replace all related O-rings and seals with correct size and material; lubricate O-rings with the specified PAG oil to ensure proper sealing.
- Perform vacuum and leak test after installation, then recharge the system to the manufacturer’s specified refrigerant and oil charge.
- Use proper tools: AC recovery/recharge station, manifold gauges, vacuum pump, torque wrench and basic hand tools. Estimated labor time: 1–2 hours depending on access and experience.
- Follow safe workshop practices and vehicle manufacturer procedures when working near electrical components and airbag systems.
Most Common Failure Causes
- Corrosion from road salt and moisture leading to pinhole leaks.
- Chafing or abrasion where the pipe contacts bodywork or brackets, causing wear-through.
- Impact or accident damage deforming or cracking the line.
- Degraded or hardened O-rings and seals at pipe connections causing refrigerant loss.
- Vibration fatigue from loose mounting or worn brackets.
There is no fixed replacement interval for AC pipes; replace when leaks, visible damage, or contamination are found. Symptoms of failure include reduced cooling, audible hissing, visible oil or dye at joints, and fluctuating system pressures.
Searchable by part numbers 9657451280, 9650628180, 9647878780 and 6460QL — a practical spare for mechanics stocking common Citroën and Peugeot HVAC parts.
