Description
Intake resonator for Citroën and Peugeot vehicles with 1.8i, 2.0i and 2.2i engines.
The intake resonator is an essential component of the air intake tract designed to reduce intake noise and smooth airflow into the engine. This unit fits many Citroën and Peugeot petrol engines in the 1.8i–2.2i range and is often searched for by part numbers 9646767780 and 1427J9. Whether you are a professional mechanic or a DIY enthusiast, replacing a damaged resonator restores quieter operation, stable idle and helps avoid unmetered air leaks that can affect engine performance.
Key Benefits
Reduces Intake Noise, Improves Airflow Stability, Prevents Resonance Pulsations, Protects Downstream Components (Mass Air Flow Sensor And Throttle Body) From Turbulence.
Fitment And Compatibility
Common Fitment: Peugeot 407. Compatible With Various Citroën And Peugeot Models Equipped With 1.8i, 2.0i And 2.2i Petrol Engines. Often Identified By The Product Codes Listed Below—many customers search using these numbers.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Peugeot 407; Compatible With Citroën/Peugeot Models With 1.8i, 2.0i And 2.2i Engines
- Product Codes: 9646767780, 1427J9
- Other Numbers: NFP
Installation Recommendations
- Work On A Cold Engine In A Well-Lit, Stable Position. Protect Surrounding Plastic And Wiring.
- Disconnect Air Intake Hoses And Loosen Clamps To Remove The Resonator. If The Mass Air Flow (MAF) Sensor Is Attached Nearby, Handle It Carefully And Protect The Wiring Connector.
- Inspect Mounting Tabs, Rubber Bushings And Sealing Surfaces. Replace Any Damaged Clamps Or Gaskets To Ensure An Airtight Seal.
- Fit The New Resonator In Reverse Order: Ensure Proper Orientation, Secure All Clamps And Check That Hoses Are Not Twisted Or Pinched.
- After Installation, Start Engine And Check For Unusual Noises, Vacuum Leaks, And Stable Idle. Reinspect Clamps After A Short Test Drive.
Most Common Failure Causes
- Aging And Heat-Induced Cracks In The Plastic Housing Leading To Air Leaks.
- Physical Damage From Road Debris Or Impact During Repairs/Accidents.
- Deformation Or Deterioration Of Mounting Rubbers And Clamps Causing Movement And Stress.
- Oil Contamination From Turbochargers Or PCV Issues (On Equipped Engines) Leading To Softening Or Blockage.
- Symptoms Of Failure Include Louder Intake Noise, Rough Idle, Reduced Throttle Response Or Diagnostic Trouble Codes Related To Airflow.
Keywords For Search: Intake Resonator, Air Resonator, Airbox Resonator, Citroën, Peugeot, 9646767780, 1427J9, Peugeot 407, 1.8i, 2.0i, 2.2i.
