High-quality replacement throttle body designed for Stellantis 1.4 16V and 1.6 16V petrol engines. Ideal for professional garages and DIY mechanics who need a reliable unit compatible with many Citroën and Peugeot models. Frequently searched by part numbers 1635W2 and 9647925480, this throttle body restores correct air metering, smooth idling and responsive throttle response after faults caused by contamination or wear.

Applications and Fitment

Compatible With: Citroën Berlingo, Citroën C2, Citroën C3, Citroën C3 Pluriel, Citroën C4, Peugeot 206, Peugeot 307, Peugeot Partner. Engines: 1.4 16V and 1.6 16V petrol engines.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: 1.4 16V, 1.6 16V (see vehicle fitment list)
• Product Codes: 1635W2, 1635.W2, 9647925480
• Other Numbers: NFP (reference in supplier listing)

Function And Common Faults

The Throttle Body Controls Airflow Into The Engine By Varying The Position Of The Throttle Plate. It Also Houses The Throttle Position Sensor And Motor/Actuator In Drive-By-Wire Systems. Typical Symptoms Of A Failing Unit Include Erratic Idle, Stalling, Poor Throttle Response, Engine Management Light And Reduced Power Modes.

Why This Part Fails

• Carbon And Soot Buildup On The Throttle Plate Causing Stickiness Or Restricted Airflow.
• Wear Or Failure Of The Throttle Position Sensor Or Actuator Electronics.
• Corroded Or Damaged Electrical Connectors And Wiring.
• Vacuum Leaks At The Throttle Body Gasket Or Intake Manifold.

How Often It Fails

Failure Depends On Driving Conditions And Maintenance. Units In Urban Or Dusty Environments Tend To Accumulate Carbon Faster. Many Throttle Bodies Show Issues After 100,000 Km, But This Varies Widely With Use And Service History.

Replacement Procedure

1. Disconnect Battery Before Starting Work To Prevent Electrical Damage And Avoid Faults.
2. Remove Intake Hose And Any Sensors Or Vacuum Lines Attached To The Throttle Body. Label Hoses If Necessary.
3. Unbolt The Throttle Body From The Intake Manifold And Remove The Old Gasket.
4. Fit New Gasket And Install Replacement Throttle Body. Tighten Fasteners To The Manufacturer’S Spec Or Until Secure; Use Correct Torque If Available.
5. Reconnect Electrical Connector, Sensors And Intake Hose. Ensure Connectors Are Clean And Free Of Corrosion.
6. Perform Throttle Adaptation/Idle Relearn According To Manufacturer Procedure Using A Diagnostic Tool Or By Following The Approved Relearn Steps After Reconnection.

Installation Recommendations

• Always Replace The Throttle Body Gasket And Inspect The Intake For Oil Or Carbon Deposits.
• Clean Surrounding Surfaces And Air Inlet To Minimize Contamination.
• Do Not Force Electrical Connectors; Check Pins For Damage Or Corrosion.
• Follow Manufacturer’S Procedures For Throttle Relearn. If No Exact Procedure Is Available, Use A Diagnostic Tool To Reset Adaptations.
• Check For Vacuum Leaks And Intake System Integrity After Installation.

Recommended Tools

Basic Hand Tools, Torque Wrench (If Available), Clean Rags, Brake Cleaner Or Throttle Cleaner For Surrounding Areas, Diagnostic Interface For Throttle/Idle Relearn.

Why Choose This Part

This Throttle Body Offers Direct Fitment For Common Citroën And Peugeot Engines, Clear Cross-References To Popular Part Numbers And A Practical Solution For Restoring Driveability Without Replacing The Entire Intake System. Suitable For Workshops And Experienced DIY Mechanics.

Used throttle body assembly compatible with a range of Citroën and Peugeot petrol engines. This replacement unit fits many 1.4 16V and 1.6 16V applications and is often sought by part numbers 9647925480 and 1635W2. Designed for professional workshops and DIY mechanics who need a direct-fit component to restore correct air intake control, idle stability and throttle response.

Key Benefits

Reliable restoration of air metering and engine idle control. Direct-fit replacement for affected models to eliminate faults such as throttle position sensor errors and idle control warnings. Ideal for vehicles showing fault codes related to throttle position (P0120–P0123) or idle control (P0505).

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën Berlingo, Citroën C2, Citroën C3, Citroën C3 Pluriel, Citroën C4, Peugeot 206, Peugeot 307, Peugeot Partner (1.4 16V / 1.6 16V petrol variants)
• Product Codes: 9647925480, 1635W2, 1635.W2
• Other Numbers: Diagnostic Codes Often Associated: P0120–P0123, P0505

Function And Common Faults

The throttle body controls the amount of air entering the engine by means of a butterfly plate and associated position sensing. On modern petrol engines the assembly typically contains the throttle plate, a position sensor (TPS) and an actuator or idle control interface. Common symptoms of a failing throttle body include unstable idle, reduced throttle response, engine warning light illumination and fault codes related to throttle position or idle control.

Why Throttle Bodies Fail

Most failures are caused by carbon and oil deposits building up on the throttle plate and bore, which restrict movement and corrupt position readings. Electrical faults in the position sensor or actuator can also occur over time due to moisture, wear or intermittent contacts. Vacuum leaks at the mounting flange or a damaged gasket further upset idle control and engine performance.

Installation Recommendations

Before starting, always disconnect the battery and follow the vehicle manufacturer’s safety guidelines. Typical replacement steps:

• Remove the air intake hose and intake resonator to access the throttle body.
• Disconnect the electrical connector and any vacuum lines attached to the body.
• Unbolt the throttle body from the intake manifold, remove old gasket and clean mating surfaces.
• Fit the new throttle body with a correct gasket, torque bolts to manufacturer specs, reconnect electrical connector and vacuum lines.
• Reconnect the battery and perform throttle adaptation / idle relearn procedure according to the vehicle service manual or using a diagnostic tool.

Professional tools are recommended for proper relearn/initialization to ensure correct idle and throttle response. Replace any damaged hoses or gaskets during installation to prevent future issues.

Replacement Tips For Mechanics And Enthusiasts

Inspect the intake tract and PCV system for oil contamination when installing a new throttle body. If heavy carbon buildup is present, consider cleaning the intake and replacing the intake gasket. Where possible, check for stored diagnostic trouble codes before and after replacement to confirm fault resolution.

Why Choose This Part

This unit carries the common OEM reference numbers used in Citroën and Peugeot service networks and is selected by professionals looking for a reliable direct-fit replacement for 1.4 16V and 1.6 16V petrol engines. Supplying clear part numbers in search queries (e.g. 9647925480, 1635W2) increases the chance of fast, accurate matches when sourcing the correct replacement.