Description
Air conditioning pipe for Citroën C4 and Peugeot 307/308 2.0 HDi RHR
This air conditioning pipe is a direct-fit replacement part intended for Citroën and Peugeot models equipped with the 2.0 HDi RHR engine. It is commonly sought after by workshops and DIY mechanics by reference numbers 9658227380 and 647735. The pipe routes refrigerant between HVAC components, maintaining system pressure and ensuring reliable cooling performance when installed correctly.
Designed for professional and home repairs, this AC line simplifies service work by matching factory connection points and mounting locations. When replacing the pipe, pay attention to sealing surfaces and fittings to avoid leaks — correct O-rings and proper lubrication are essential for a long-lasting repair. The part is suitable for routine AC repairs after collision damage, aging leaks, or when replacing adjacent components such as condensers or evaporators.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4; Peugeot 307; Peugeot 308
- Product Codes: 9658227380; 647735
- Additional Numbers: RHR (Engine/Designation: 2.0 HDi RHR)
Installation Recommendations
Always recover refrigerant from the system using certified equipment before removing any AC components. Replace all O-rings and seals at the connection points and apply the correct lubricant compatible with the vehicle’s refrigerant and oil type. Inspect adjacent components (condensers, hoses, fittings) for damage or contamination. After fitting the new pipe, perform a pressure/leak test, evacuate the system to the required vacuum level, and recharge to the manufacturer’s specified refrigerant amount. Tighten fittings to the correct torque to prevent deformation and leaks.
Most Common Failure Causes
AC pipes typically fail due to external corrosion from road salt and moisture, mechanical damage from impacts or improper handling, vibration fatigue at mounting points, and degraded seals or O-rings that allow refrigerant to escape. Contamination inside the system (moisture or debris) can accelerate corrosion and sealing failures.
