Description
Air conditioning pipe for Citroën C4, C4 Picasso and Peugeot 307, 3008 with 1.6 HDi engine.
This air conditioning (A/C) pipe is a direct-fit replacement designed for Citroën and Peugeot models equipped with the 1.6 HDi diesel engine. It carries refrigerant between components of the climate system and restores pressure integrity when a damaged or leaking line reduces cooling performance. The part is commonly sought by its OEM numbers, so listing these references increases the chance of quick identification in workshops and spare-part searches.
Key Benefits
– Direct fit for affected Citroën and Peugeot models with 1.6 HDi engines.
– Restores A/C system integrity and cooling efficiency.
– Supplied with fittings compatible with original connections (replace O-rings when installing).
Function And Typical Failures
The A/C pipe transports refrigerant under pressure between the compressor, condenser, evaporator and expansion components. Over time the line can lose tightness due to corrosion at metal joints, abrasion from road debris, degraded rubber sections or failed sealing O-rings. Leaks in this pipe lead to loss of refrigerant, reduced cooling capacity and potential contamination of the system with moisture or air.
Replacement Frequency
There is no fixed service interval for A/C pipes; they are generally replaced on condition. Typical triggers for replacement are visible oil traces, loss of cooling performance, audible hissing, or a detectable refrigerant leak during inspection. In many cases pipes last the lifetime of the vehicle but should be inspected during any A/C system service or after collision damage.
Installation Recommendations
- Have the refrigerant recovered by a certified workshop before starting work (system must be depressurized to avoid injury and environmental release).
- Replace all sealing O-rings and lubricate them with the correct PAG oil compatible with the vehicle’s refrigerant. Do not reuse old O-rings.
- Use appropriate line wrenches and avoid twisting or kinking the new pipe during installation. Inspect mounting clips and brackets; replace if damaged.
- After fitting, perform vacuuming of the system and recharge with the correct refrigerant specified for the vehicle (commonly R134a on older 1.6 HDi models). Check for leaks and correct system pressures during run-up.
- Follow manufacturer procedures and safety precautions when working with refrigerant and pressurized A/C components.
How The Part Is Replaced (Overview For Mechanics / DIY)
- Recover refrigerant using approved equipment.
- Remove any underbody covers or dash panels necessary to access the pipe ends and mounting points.
- Loosen and remove fittings, noting orientation and routing for correct refit.
- Fit new pipe, replace O-rings, secure all brackets and torque fittings to manufacturer’s recommendations.
- Evacuate, leak-test and recharge the system to specified levels; verify A/C performance on the road or during a static run-up.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4, Citroën C4 Picasso, Peugeot 307, Peugeot 3008 (first generation)
- Product Codes: 9685502680, 6477D4
- Additional Numbers: 6460LZ, 6460XP
Reason Why The Part Most Commonly Fails
The most frequent causes of failure are corrosion at metal joints, mechanical damage from debris or contact with other components, aging and cracking of rubber sections, and deterioration of O-ring seals. Improper installation or incomplete evacuation/contamination of the system during previous servicing can also accelerate failure.
Searchable part numbers such as 9685502680, 6477D4, 6460LZ and 6460XP make this item easy to find for fast procurement. Order the correct A/C pipe to restore reliable cooling to Citroën and Peugeot vehicles equipped with the 1.6 HDi engine.
