Description
Air conditioning pipe for Citroën C4 and Peugeot 307
Product Overview
This air conditioning (A/C) pipe is a direct-fit replacement commonly used on selected Citroën and Peugeot models. It restores reliable refrigerant circulation between components in the HVAC system and is often searched for by its OEM part numbers (9658227780, 647738). Ideal for professional garages and DIY mechanics who need a durable pipe that meets factory fitment standards.
Key Benefits
- OEM-referenced fit for clean installation and correct alignment with existing A/C components.
- Helps stop refrigerant leaks that reduce cooling performance and can damage other A/C parts.
- Suitable for tradespeople and experienced DIYers — commonly located and replaced during A/C service or component overhaul.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot OEM)
- Model: Citroën C4; Peugeot 307 (also fitted on some related PSA models)
- Product Codes: 9658227780, 647738
- Other Numbers: 647738 | 9658227780
Compatibility Notes
Primary fitment is indicated for Citroën C4 and Peugeot 307 platforms. The same pipe design may appear on related PSA group models with similar HVAC layouts; always compare the part number and connector positions with the unit being replaced.
Installation Recommendations
Replacement of an A/C pipe requires correct A/C service procedures and tools. Recommended steps:
- Recover refrigerant using certified recovery equipment before opening the system. Do not release refrigerant to the atmosphere.
- Remove any trim or brackets blocking access to the pipe. Note routing and support points to ensure correct refitment.
- Disconnect fittings, replace all associated O-rings/seals with correctly sized new O-rings lubricated with appropriate PAG oil.
- Refit the new pipe, torque fittings to manufacturer values where available, and ensure proper clamp/support positioning to avoid chafing.
- Evacuate the system with a vacuum pump, perform a leak test, then recharge with the correct refrigerant type and nominal charge (observe vehicle-specific refrigerant and oil specifications, typically R134a for many older PSA models).
- Operate the A/C system and check pressures and temperatures to confirm correct operation.
Why This Part Fails
Common causes of A/C pipe failure include corrosion from road salt and moisture, mechanical damage from impacts or rubbing, and degradation of joints and O-rings over time. Failure typically presents as refrigerant leaks, loss of cooling efficiency, or visible oil residue around connections. Vibration and age-related embrittlement of hoses and seals accelerate wear.
Practical Tips
- When replacing the pipe, always fit new O-rings and use the correct lubricant to ensure sealing.
- Inspect adjacent components (compressor, condenser, evaporator, receiver/drier) for contamination or damage—A/C system failures are often multi-component.
- After installation, monitor the system for a short period to confirm there are no slow leaks and that cooling performance is restored.
Suitable For
Designed for garages and seasoned DIY mechanics working on Citroën and Peugeot vehicles who require a reliable OEM-referenced air conditioning pipe to restore system integrity and cooling performance.
