Description
Air conditioning pipe for CITROËN C4, C4 Picasso and PEUGEOT 307, 3008 with 1.6 HDi engine
This air conditioning pipe is a direct-fit replacement used in Citroën and Peugeot vehicles equipped with the 1.6 HDi diesel engine. Designed to restore reliable refrigerant flow and pressure within the A/C circuit, the pipe is commonly referenced under OE numbers such as 9681723880 and 6460LZ – frequent search terms for mechanics and DIYers. Robust construction and correct connections ensure airtight joints when installed with fresh sealing rings and correct service procedure, making it a practical part for HVAC repairs on C4, C4 Picasso, 307 and 3008 models.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4, Citroën C4 Picasso, Peugeot 307, Peugeot 3008 (vehicles with 1.6 HDi engine)
- Product Codes: 9681723880, 6460LZ
- Additional Numbers: 9650200980, 6460XP, 9656859180, 6477D4
Function
The pipe carries refrigerant between components of the air conditioning system (commonly between the evaporator, receiver/drier and condenser depending on routing). It maintains sealed high- and low-pressure paths so the compressor and expansion device can operate at correct pressures and temperatures, delivering cabin cooling.
Common Failure Modes
- Corrosion and material ageing causing cracks or pinhole leaks, especially at fittings and bends.
- O-ring deterioration at connection points leading to slow leaks.
- Mechanical damage from road debris, chafing against adjacent components or excessive vibration.
- Contamination or internal blockage from failed components elsewhere in the system (rare).
How To Replace
Replacement should follow proper A/C service procedures. Typical steps performed by a qualified technician or an experienced DIYer with the right equipment:
- Safely recover and store refrigerant using an approved recovery machine before opening the system.
- Disconnect battery as a safety precaution and follow manufacturer guidelines for electrical isolation.
- Remove any obstructing trim or components to access pipe fastenings and brackets.
- Unbolt connections, carefully remove the old pipe and inspect mating surfaces.
- Replace all O-rings/sealing rings with quality replacements lubricated with correct PAG oil; replace receiver/drier if recommended by service schedule.
- Install the new pipe, secure brackets and torque fittings to manufacturer specifications.
- Perform vacuum leak test, then evacuate and recharge the system with the correct type and amount of refrigerant and lubricant (models of this era typically use R134a systems).
- Run the system to verify pressures and cooling performance and check for leaks after service.
Installation Recommendations
- Always recover refrigerant before dismantling the A/C circuit; never vent to atmosphere.
- Replace O-rings and any single-use sealing parts whenever the circuit is opened.
- Use OEM-equivalent fittings and the correct grade of PAG oil to prevent seal swelling or compressor damage.
- Inspect adjacent components (compressor, condenser, receiver/drier, expansion valve) for wear or contamination that could shorten the new pipe’s life.
- If you lack A/C service equipment (recovery, vacuum pump, charging scale), entrust recharging and leak checking to a professional workshop.
Why This Part Fails Most Often
Age-related degradation (rubber and metal fatigue), corrosion from road salt and moisture, and mechanical damage from impacts or rubbing are the most common reasons for A/C pipe failure. Failure typically appears as slow refrigerant leaks at connection points or visible cracks along the pipe routing.
Typical search references: 9681723880, 6460LZ, 9650200980, 6460XP, 9656859180, 6477D4. Ideal for professional garages and competent DIY mechanics working on Citroën/Peugeot 1.6 HDi air conditioning repairs.
