Description
Air conditioning refrigerant pipe for Citroën C5 X7 and Peugeot 407.
Product Overview
This OEM-style refrigerant pipe is designed for the air conditioning system on Citroën C5 X7 and Peugeot 407 models. The pipe routes high- and low-pressure refrigerant between components (compressor, condenser, evaporator and dryer/receiver) and is built to the original fitment and connection geometry for reliable sealing and long-term operation. Ideal for professional garages and experienced DIY technicians searching by part numbers 9659576280 or 647773.
Benefits
- Direct fit for simple, time-saving replacement on compatible Citroën and Peugeot vehicles.
- Durable construction to withstand vibration and thermal cycling in the engine bay.
- Maintains correct refrigerant routing and pressure balance for efficient climate control performance.
- Supplies commonly sought OEM codes for easy online search and inventory management.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C5 X7; Peugeot 407
- Product Codes: 9659576280
- Additional Numbers: 647773
Function And Failure Modes
The refrigerant pipe carries refrigerant between the air conditioning system components and must maintain a leak-free seal under alternating high and low pressures and wide temperature changes. Common causes of failure include corrosion (especially in regions using road salt), mechanical damage from impact or chafing against other components, deterioration of connection O‑rings/seals, and fatigue at welded or flared joints. When the pipe leaks, the system will lose refrigerant charge, leading to reduced cooling performance and potential compressor damage if operated without sufficient refrigerant or oil.
Replacement Procedure (Overview)
Replacement requires standard AC service equipment and should be performed by a trained technician or an experienced DIYer familiar with refrigerant handling regulations:
- Recover refrigerant using an approved recovery machine to meet environmental and legal requirements.
- Disconnect battery if recommended by vehicle manufacturer for safety when working near electrical components.
- Remove any obstructing engine covers or components to access pipe routing and fittings.
- Unscrew or release the pipe connections; inspect and replace all O‑rings, seals and any mounting clips.
- Install the new pipe ensuring correct orientation and torque on fittings where specified.
- Evacuate the system with a vacuum pump to remove moisture and check for leaks using a vacuum hold test and, if available, electronic leak detection.
- Recharge the system with the specified refrigerant type and correct oil charge; run the system to verify pressures and cooling performance.
Installation Recommendations
- Always recover refrigerant with certified equipment; do not vent to atmosphere.
- Replace O‑rings and seals at all disconnected joints. Lubricate new O‑rings with the correct PAG oil to ensure proper sealing.
- Perform a full vacuum and leak test before recharging. Even small leaks will reduce system longevity and efficiency.
- If the system has been open to the atmosphere, consider replacing the receiver/drier or accumulator to protect the compressor from moisture contamination.
- Use manufacturer-specified refrigerant and oil types and follow PSA/vehicle-specific charging procedures for accurate system performance.
Why This Part Most Often Fails
Failures are typically the result of long‑term exposure to the elements (corrosion), mechanical damage from road debris or engine bay contact, and seal degradation at connection points. Vibration and thermal cycling can also cause fatigue at joints and fittings. Preventive inspection during routine service and prompt repair of any observed leaks will extend system life.
Compatibility And Identification
Search by OEM part numbers 9659576280 and 647773 for fast identification in parts catalogs and online listings. Confirm compatibility by matching the pipe shape, connector types and mounting points to the vehicle’s existing assembly prior to installation.
Notes For Professionals
This part is suitable for workshop-level replacement. Keep service records of refrigerant and oil quantities used during recharge to aid future diagnostics and warranty tracking.
