Product Overview

High-quality replacement air intake duct for 1.4 HDi engines used on Citroën and Peugeot models. This part (OEM references 9645371180, 9646698680, 0361N4) restores a sealed airflow path between the air filter housing and the turbocharger/intercooler system, helping to maintain correct boost pressure, throttle response and fuel economy. Designed for professional workshops and experienced DIY mechanics who require a reliable, direct-fit solution.

Fits The Following Models

Compatible With: Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 206, Peugeot 207. Often referenced by product codes 9645371180, 9646698680 and 0361N4.

Installation Recommendations

Replacement Is Straightforward For Experienced Technicians: loosen and remove the clamps securing the original duct to the airbox and turbo inlet, carefully detach any attached sensors or vacuum lines, remove the old duct and fit the new one ensuring all sealing lips sit correctly. Refit clamps and any removed sensors, then perform a visual check for leaks at idle and under boost. Use OEM-style clamps or torque-specified hose clamps to avoid overtightening. Inspect mating surfaces for oil contamination or damage and clean before installation.

Typical Symptoms Of A Faulty Intake Duct

• Loss Of Engine Power And Sluggish Acceleration
• Rough Idle Or Fluctuating RPM
• Increased Fuel Consumption And Reduced Driveability
• Whistling Or Hissing From Engine Bay Under Boost

Why The Part Usually Fails

Air intake ducts are exposed to heat, oil vapour and mechanical stress. Over time the material can harden, crack or split at the bends and connection points. Oil contamination from crankcase ventilation, repeated boost cycles and vibration accelerate degradation. Damage Or Leaks Cause Unmetered Air Ingress Or Loss Of Boost, Which Directly Affects Engine Performance.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: 1.4 HDi Applications – Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 206, Peugeot 207
• Product Codes: 9645371180, 9646698680
• Other Numbers: 0361N4

Tips For A Durable Repair

• Replace Worn Clamps Alongside The Duct To Ensure A Secure Seal.
• Check And Clean The Air Filter Housing And Turbo Inlet For Oil Residue.
• Inspect Associated Vacuum Lines And PCV Hoses; Replace If Brittle Or Cracked.
• After Installation, Verify System Integrity Under Load To Confirm No Leaks.

For Whom This Part Is Intended

Recommended For Professional Auto Technicians And Competent DIY Enthusiasts Working On Citroën And Peugeot 1.4 HDi Engines Who Need A Direct-Fit Replacement Part Referenced By OEM Numbers 9645371180, 9646698680, 0361N4.