Product Overview

This air conditioning pipe is designed for Citroën and Peugeot models equipped with R134a refrigerant circuits. It replaces deteriorated or damaged refrigerant lines to restore proper coolant flow, prevent leaks and ensure efficient air conditioning performance. The part is commonly referenced by manufacturer codes and OE numbers, which makes it easy for technicians and DIY enthusiasts to search and identify the correct replacement.

Key Benefits

• Direct-fit replacement for specified Citroën and Peugeot models.
• Restores system integrity and helps prevent refrigerant leakage.
• Maintains correct refrigerant flow for efficient climate control operation.
• Supplied to match original connection types and mounting points.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4, Citroën C4 II, Citroën C5 II, Peugeot 307, Peugeot 407
• Product Codes: 6460JA, 6460JC, 6460PW, 647736, 647738
• Additional Numbers: R134a

Compatibility Notes

Compatibility is primarily determined by the vehicle model and the original part number. These pipes are intended for the models listed above; however, variations in engine, production year, and factory options can affect fitment. Always verify the reference number against the part being replaced when possible.

Installation Recommendations

• Have the refrigerant properly recovered by a certified recovery machine before removing the old pipe—do not vent refrigerant to the atmosphere.
• Replace all associated O-rings and seals with correct-sized, refrigerant-compatible O-rings lubricated with the manufacturer-recommended PAG oil.
• Inspect mating connections, receiver-drier/accumulator and compressor for contamination or damage; replace if contaminated to avoid premature failure of the new pipe.
• Perform a vacuum test on the evacuated system to check for leaks and moisture (recommended vacuum hold time per service manual).
• Recharge the system with the correct type and amount of refrigerant (R134a) and oil as specified by manufacturer data.
• After charging, run system and perform leak check (UV dye or electronic leak detector) and verify correct pressures and temperatures.

How The Part Is Replaced

Replacement typically involves recovering the refrigerant, disconnecting the pipe fittings (keeping track of the orientation and any brackets), removing the old line, fitting new O-rings and installing the new pipe. Secure all brackets and retighten fittings to the correct torque. Evacuate and recharge the system, then verify operation and inspect for leaks. Depending on vehicle layout, some dash or engine bay components may need to be moved for access—follow service manual procedures.

Common Failure Causes

• Corrosion from road salt or moisture attack on metal sections, especially in regions with harsh winters.
• Mechanical damage from impacts, chafing or contact with moving parts or heat sources.
• Age-related deterioration of joints and O-rings leading to refrigerant oil and gas leakage.
• Contamination inside the A/C system (debris, moisture) that accelerates corrosion or clogs components.

Why Replace This Part

A leaking or restricted air conditioning pipe reduces cooling performance, can allow moisture into the system, and may lead to compressor damage if left unaddressed. Replacing the defective pipe and renewing seals restores system reliability and prevents further component failures.

Advice For Professionals And DIY Mechanics

This part is suitable for professional workshops and experienced DIY mechanics familiar with A/C service procedures. Proper refrigerant handling equipment and knowledge of A/C system charging and leak testing are essential for safe and legal installation. If in doubt, consult the vehicle service manual or a trained technician.

This air conditioning pipe is an OEM-type replacement designed for several Citroën and Peugeot models. It creates a reliable, high-pressure conduit for refrigerant between air conditioning components, helping maintain system efficiency and cabin cooling performance. The part is often searched for by its OEM numbers — include these codes in your search to find the exact fit for the vehicle.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4, Citroën C5 II (X7), Peugeot 307, Peugeot 407
• Product Codes: 9653106980, 9653107880, 9657302480, 9659577880, 9677949880, 9677930480
• Additional Numbers: 6460JA, 6460JC, 6460PW, 647736, 647738, 647775, 647777, 647779, 647786, 6477AA, 6477N2, 6477N3, 64777

Function And Benefits

The pipe transports refrigerant under pressure between components of the air conditioning system (compressor, condenser, evaporator, dryer/receiver). A properly sealed and undamaged line is essential to avoid refrigerant loss, maintain correct operating pressures and ensure efficient cooling. Using the correct OEM-coded pipe reduces the risk of leaks and improves long-term reliability.

Recommended Replacement And Installation Notes

• Recover refrigerant using approved recovery equipment before disconnecting any A/C lines — follow local regulations and safety procedures.
• Replace all associated O-rings and seals with compatible parts lubricated with the correct PAG oil for the system. Old seals are a common source of leaks.
• Inspect mating surfaces, clamps and brackets for corrosion or damage and replace if necessary to ensure correct alignment and sealing.
• When fitting the new pipe, tighten fittings to the manufacturer’s torque specifications and avoid bending the line beyond its design to prevent stress points.
• After installation, evacuate the system to remove moisture and air, then recharge with the refrigerant type and quantity specified by the vehicle manufacturer (many vehicles of these model years commonly use R134a; confirm the correct refrigerant for the specific vehicle).
• Perform a leak and pressure test, then run the system to verify correct pressures and proper cooling performance.

Typical Failure Causes

Air conditioning pipes most commonly fail due to corrosion (especially in areas exposed to road salt), mechanical damage from road debris or contact with other components, vibration-induced fatigue at connectors or bends, and deterioration of O-rings and seals over time. Heat cycles and oil contamination can also accelerate material degradation. Regular inspection during service can detect early signs of leakage or abrasion.

Practical Tips For Mechanics And DIY Repairers

• Search by the OEM product codes listed above to ensure you order the correct item for the vehicle.
• Always replace seals and lubricate them during assembly — reused O-rings often lead to post-repair leaks.
• If the system has lost refrigerant, check the pipe routes and joints carefully for oil traces as indicators of leaks.
• Consider inspecting the dryer/receiver and compressor condition when replacing lines, since contamination or moisture can affect new components.

Suitable for professional workshops and experienced DIYers familiar with A/C system service. Correct installation and leak-free joints are essential for proper operation and environmental compliance.

This is a used part, carefully checked for functional reliability. Thanks to precise compatibility with the selected Citroën and Peugeot models, installation is quick and straightforward, saving you time and money. Beyond maintaining a comfortably cool interior, the pipe plays a crucial role in the vehicle’s overall energy efficiency.

Technical Information:

• Manufacturer: PSA Group
• Model: Compatible with Citroën C4, C5 II, C5 X7 and Peugeot 307, 407
• Product Codes: 9677930480, supplementary code 647779

Whether performing routine maintenance or comprehensive repairs on your air conditioning system, this AC pipe is a necessary component that helps ensure your vehicle continues to provide optimal performance and comfort. Focus on quality and reliability by choosing our original auto part designed for your Citroën or Peugeot.

Get this essential part of your cooling system today and enjoy the comfort and dependability that come with a properly functioning air conditioning system. Your vehicle will benefit, and more importantly, so will you during hot summer days.