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.

Direct-fit air conditioning line designed for Citroën C4 and Peugeot 307 models. This replacement AC pipe matches common OEM reference numbers and is ideal for professional mechanics and experienced DIYers looking for a reliable, serviceable part. The part is commonly searched by its reference codes, making it easy to find when ordering or cross-referencing in parts lists.

Features

• Direct-fit replacement for original equipment on compatible Citroën and Peugeot models.
• Durable metal construction with corrosion-resistant surface treatment for long service life.
• Compatible with multiple OEM reference numbers for straightforward identification.
• Designed to carry refrigerant and lubricant between AC components with minimal pressure loss.

Technical information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4, Peugeot 307
• Product Codes: 9650628180, 9657451280, 9647878780
• Additional Numbers: 6460QL

Fitment

Fits Citroën C4 and Peugeot 307 vehicles equipped with 1.4 16V, 1.6 16V and 2.0 16V petrol engines. Check vehicle variant and engine type when selecting parts to ensure correct routing and connection types.

Function And Common Failure Modes

The AC pipe transports refrigerant and oil between major air conditioning components (compressor, condenser, evaporator/receiver-drier) and maintains the sealed circuit under pressure. Typical causes of failure include:

• Corrosion from road salt and moisture leading to pinhole leaks.
• Mechanical damage from impacts or incorrect routing during previous repairs.
• Deterioration of sealing surfaces and O-rings, resulting in refrigerant loss.
• Clogging or internal contamination causing elevated pressures and fatigue.

Installation Recommendations

Installation should be performed by a qualified technician or an experienced DIYer with the correct tools. Recommended steps:

• Recover refrigerant with appropriate recovery equipment prior to disassembly—do not vent refrigerant to atmosphere.
• Replace all associated O-rings and seals with correct size and material (lubricated with compatible PAG oil) to ensure leak-free connections.
• Inspect mating components (compressor ports, condenser, receiver-drier) for damage or corrosion and replace as needed.
• Perform vacuum and leak test after installation, then charge the system to the manufacturer’s specified refrigerant and oil quantities.
• Verify proper routing and secure all clamps and brackets to avoid chafing and vibration.

Most Common Reason For Failure

Corrosion and seal deterioration are the most frequent causes of leaks. Road salt, moisture ingress and age-related degradation of O-rings lead to slow refrigerant loss and reduced cooling performance. Mechanical damage during collision repairs or improper hose routing can also cause premature failure.

Frequently searched by reference numbers: 9650628180, 9657451280, 9647878780, 6460QL.