This air conditioning pipe is a direct-fit refrigerant line intended for Citroën C2 and Citroën C3 models, including Citroën C3 Pluriel. Ideal for professional workshops and experienced DIY mechanics, the part is commonly searched by OE reference numbers and aftermarket codes—useful keywords include Citroën A/C pipe, AC line, refrigerant hose, and OE 9680121580.

Technical Information

Manufacturer: Stellantis (Citroën / Peugeot)
Model: Citroën C2; Citroën C3; Citroën C3 Pluriel
Product Codes: 9680121580
Additional Numbers: 647794; NFP

Function And Fitment

The pipe transfers refrigerant between air conditioning components (compressor, condenser, dryer/receiver and evaporator) under high pressure. It is designed to match the original routing and connection points on compatible Citroën models to ensure correct pressure behaviour and leak-free operation when installed with proper seals.

How To Replace

Replacement requires depressurising and recovering the refrigerant with certified equipment before disconnecting the line. Steps generally include:
– Recover Refrigerant Using Approved Recovery Machine.
– Loosen And Remove Fasteners And Quick-Connect Fittings.
– Replace All O-Rings/Seals With Correct Type Lubricated With Appropriate PAG Oil Or Manufacturer-Specified Lubricant.
– Fit The New Pipe Ensuring Correct Routing And Secure Clamps; Avoid Twisting Or Kinking.
– Perform A Vacuum Leak Test (Typically 30 Minutes Or More) To Ensure System Integrity.
– Recharge System With Specified Refrigerant And Oil Quantities; Check For Leaks And Proper System Pressures.

Installation Recommendations

Always use new O-rings and the correct refrigerant oil when assembling A/C connections. Tighten fittings to manufacturer torque where specified and ensure hoses and pipes are secured away from moving parts and sharp edges to prevent chafing. Vacuum and leak testing are essential before charging the system. Handling refrigerant requires appropriate certification and equipment — this job is best performed in a properly equipped workshop if you are not experienced.

Most Common Failure Causes

Air conditioning pipes commonly fail due to corrosion, mechanical damage from road debris, chafing against neighbouring components, deteriorated seals at connection points, or fatigue from vibration and thermal cycling. Leaks often show as oily residue at joints, hissing noises, reduced cooling performance, or abnormal system pressures.

Expected Lifetime

There Is No Fixed Replacement Interval. Many Pipes Last The Life Of The Vehicle, But Failures Tend To Occur After Several Years (Often Around 8–15 Years) Depending On Climate, Road Conditions And Maintenance. Regular Inspections For Corrosion And Leak Signs Help Catch Issues Early.

Signs You Need Replacement

Look For Visible Oil Traces Or Refrigerant Stains On The Pipe, Hissing Or Bubbling Noises When The System Is Running, Rapid Loss Of Cooling Capacity, Or Low System Pressures Indicated On Service Gauges. Any Confirmed Leak Requires Repair Or Replacement And Proper System Evacuation And Recharge.

Product Overview

This air conditioning pipe is suitable for Citroën small‑car platforms and is commonly referenced by part numbers 9650823380, 6460ZR and 647794. It is designed to route refrigerant between AC components and restore the integrity of the cooling circuit after damage or wear. Ideal for professional workshops and experienced DIYers looking for a direct replacement that matches original fitment on the listed models.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C2; Citroën C3; Citroën C3 Pluriel
• Product Codes: 9650823380; 6460ZR; 647794
• Other Numbers: NFP

Function And Typical Construction

The pipe carries refrigerant under pressure between AC components (for example between the evaporator, compressor and condenser), and includes dedicated fittings and sealing interfaces. Construction is metal tubing (commonly aluminum) with service connection points and rubber O‑ring seals. Proper sealing and routing are critical to maintain system pressure and prevent leaks.

Replacement Procedure (Summary For Mechanics And Experienced DIY)

• Safely recover refrigerant from the system using certified recovery equipment before any disassembly.
• Access the pipe by removing any relevant trim or underbody shields to reach the AC lines and fittings.
• Loosen and disconnect the pipe connections at the designated service ports or flared fittings. Inspect mating surfaces.
• Replace all O‑rings/seals with new, correctly sized parts lubricated with the manufacturer‑specified AC oil.
• Fit the replacement pipe and tighten connections to manufacturer specifications where available; avoid overtightening.
• Evacuate the system to remove moisture and check for leaks (vacuum test), then recharge with the correct type and amount of refrigerant and oil per manufacturer specifications.
• Perform a functional test of the air conditioning system and recheck for leaks after a short test drive.

Installation Recommendations

• Always use professional refrigerant recovery and charging equipment; venting refrigerant to atmosphere is illegal and harmful.
• Replace sealing O‑rings whenever a line is disconnected and lubricate them with the specified compressor oil to ensure proper sealing.
• Inspect nearby lines, brackets and mounting points for corrosion or damage and secure any loose clamps to prevent future chafing.
• After installation perform a vacuum and leak test, then charge the system to the exact refrigerant and oil specifications for the vehicle (many pre‑2017 PSA models use R134a—confirm against vehicle documentation before service).
• If in doubt or lacking AC service equipment, have the job completed by an authorized workshop to ensure system integrity and safety.

Why This Part Fails Most Often

AC pipes commonly fail due to corrosion from road salt and moisture, impact or abrasion from road debris, vibration‑induced fatigue at brackets or fittings, and seal deterioration (O‑rings) leading to slow leaks. Improper previous repairs, over‑tightening of fittings or prolonged refrigerant/oil loss can accelerate wear and cause complete loss of cooling performance.

Notes For Buyers

Searches for this part are often performed using the product numbers 9650823380, 6460ZR or 647794—including these codes in your search will help locate the correct item quickly. The part is intended for Citroën C2, C3 and C3 Pluriel models; ensure visual match with the existing pipe and fittings before installation.