Description
Air conditioning pipes for Citroën C4 and Peugeot 307. Undamaged – fully sealing.
These air conditioning pipes (OE references 9658201280, 647741) are intended for Citroën C4 and Peugeot 307 vehicles and provide a reliable, leak-tight connection inside the A/C circuit. The lines are manufactured to match original routing and mounting points so they fit without modifications. Ideal for professional workshops and experienced DIY mechanics who search parts by product number (9658201280, 647741).
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4; Peugeot 307
- Product Codes: 9658201280, 647741
- Other Numbers: –
Function
Air conditioning pipes carry refrigerant between major components (compressor, condenser, evaporator and receiver/drier). They maintain system pressure and routing while ensuring tight seals at connection points. A leak in these lines leads to loss of refrigerant, reduced cooling performance and can eventually cause compressor damage if oil and refrigerant levels drop.
How Replacement Is Performed
- Recover Refrigerant: Evacuate the refrigerant using certified A/C recovery equipment (do not vent to atmosphere).
- Access And Remove: Remove any trim or components blocking access, then unbolt the A/C line fittings and clamps. Keep track of bracket locations and fasteners for correct refitment.
- Replace Seals: Always replace O‑rings and sealing washers at each connection with correct-size, lubricant-coated seals.
- Fit New Pipe: Install the new pipe making sure routing matches original to avoid kinks or contact with moving parts.
- Pressure Test And Evacuate: Perform a pressure/leak test, then evacuate the system to remove moisture and air (vacuum hold test recommended).
- Recharge And Test: Recharge the system with the manufacturer-specified refrigerant and oil, then verify correct pressures and cooling performance during a road or bench test.
Installation Recommendations
- Use Professional A/C Service Equipment: Recovering, vacuuming and recharging require approved machines and gauges.
- Replace All Sealing Elements: Old O‑rings often harden and cause new leaks—fit new seals lubricated with correct A/C oil.
- Check Mounts And Clamps: Ensure brackets and anti-vibration mounts are intact to prevent chafing or fatigue failures.
- Follow Manufacturer Procedures: Adhere to workshop manuals for access, torques and service intervals to avoid damage.
- Safety First: Wear eye protection and gloves; avoid skin contact with refrigerant and oil.
Most Common Failure Causes
- Corrosion And Environmental Damage: Road salt, moisture and stone impacts accelerate pipe corrosion and create pinhole leaks.
- Mechanical Damage: Contact with moving parts or improper lifting during repairs can dent or fracture lines.
- Degraded Seals: O‑rings and crush washers age, harden and lose elasticity, allowing refrigerant to escape at joints.
- Vibration And Fatigue: Repeated flexing where the pipe is inadequately supported can cause cracking at bends or joints.
Replacement Interval
There Is No Fixed Interval For Replacing A/C Pipes. Lifespan Depends On Vehicle Use, Climate And Road Conditions. Inspection For Visible Corrosion, Oil Traces Or Loss Of Cooling Performance Is The Best Guide To Timing Replacement.
Search By Product Codes 9658201280 Or 647741 To Find This Specific Part Quickly. Suitable For Professional Repair Shops And Experienced DIY Mechanics Looking For A Direct-Fit A/C Pipe For Citroën C4 And Peugeot 307.
