VDO throttle body 9652682680 / 1635T7 designed for 2.0 16V 130 kW petrol engines used in several Citroën and Peugeot models. This electronic throttle body controls airflow into the intake manifold, ensuring accurate idle control, smooth throttle response and correct air–fuel ratio under varying engine loads. The unit is a direct-fit replacement for worn or faulty throttle assemblies and is frequently searched by its OEM numbers 9652682680 and 1635T7, making it easy to find for mechanics and DIY enthusiasts.

Technical Information

Manufacturer: VDO
Model: Citroën C4; Peugeot 206; Peugeot 307 (2.0 16V 130 kW Applications)
Product Codes: 9652682680; 1635T7
Additional Numbers: NFP

Compatibility And Fitment Notes

Fits 2.0 16V 130 kW petrol engine variants in selected Citroën and Peugeot models. Compatibility is commonly referenced by OEM part numbers 9652682680 and 1635T7. Verify engine type and intake configuration against the vehicle before installation. This throttle body is intended for models that use an electronic throttle assembly from VDO.

Installation Recommendation

Disconnect The Battery Before Starting To Prevent Unwanted Throttle Movement Or Electrical Damage. Remove The Intake Hose And Airbox To Access The Throttle Body. Unplug The Electrical Connector Carefully And Remove Mounting Bolts. Replace The Throttle Body Using A New Gasket Or O-Ring Where Applicable. Tighten Fasteners To Manufacturer Torque Specifications. After Installation Reconnect The Battery And Perform Throttle Adaptation Or Idle Learn Procedure According To The Vehicle Service Manual; If No Scan Tool Is Available, follow The Manufacturer’s Drive Cycle To Allow The Engine Control Unit To Relearn Idle Parameters. Required Tools Typically Include A Basic Socket Set, Screwdrivers, And Possibly Torx Bits Or Hex Sockets Depending On Fastener Type. Allow Approximately 30–90 Minutes For Replacement Depending On Vehicle Layout.

Why This Part Fails Most Often

Carbon Build-Up On The Throttle Plate And Bore: Over Time, Recirculated Crankcase Vapors And Intake Deposits Cause The Throttle Plate To Stick Or Move Erratically, Leading To Rough Idle Or Surging. Electronic Component Failure: Integrated Position Sensors Or Actuator Motors Can Wear Or Malfunction, Causing Incorrect Throttle Position Readings. Contamination And Corrosion: Moisture Or Debris In The Connector Can Produce Intermittent Electrical Faults. Intake Leaks And Vacuum Issues: Faults In The Intake Tract Can Cause The Throttle To Compensate, Increasing Wear. Typical Symptoms Include Unstable Idle, Stalling, Hesitation On Acceleration, Reduced Engine Response, And Illumination Of The Engine Warning Light. Failures Are More Common After High Mileage Especially If Intake Cleaning And Regular Maintenance Have Been Neglected.

This VDO unit was removed from a vehicle with 128,000 km and was reported as tested and fully functional. Using the correct OEM part numbers (9652682680, 1635T7) will help ensure fitment and simplify sourcing during repair or replacement.

This genuine-style throttle body housing is designed for select Citroën and Peugeot petrol engines (1.8 16V and 2.0 16V). It provides the mechanical and mounting interface for the throttle valve and associated sensors/actuator, ensuring correct air intake metering and stable idle control. The part is referenced under OEM numbers commonly used in the Stellantis parts system.

Application And Compatibility

Compatible With: Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 206, Peugeot 206+ equipped with 1.8 16V (1.8i) or 2.0 16V (2.0i) petrol engines. Always check the part number against the vehicle’s existing part to confirm fitment.

Function And Benefits

The throttle body housing locates and secures the throttle plate, throttle actuator and position sensor, and provides the sealed passage for incoming air. A correctly fitted throttle housing ensures accurate throttle response, stable idling and reliable communication between the mechanical throttle elements and the engine control unit. Replacing a worn or damaged housing restores correct throttle geometry and prevents air leaks that can cause poor driveability and diagnostic trouble codes.

Typical Symptoms Of A Faulty Throttle Body

• Erratic or high/low idle and unstable engine revs.
• Reduced throttle response or limp-home mode illuminated by engine management warning light.
• Stalling at idle or during deceleration.
• Vacuum or air leaks around the throttle mounting area.

Replacement Procedure (Overview)

1. Before Starting: Disconnect the negative battery terminal to avoid electrical damage or fault codes and follow vehicle manufacturer safety procedures.

2. Remove Intake Components: Detach the air intake hose and any intake resonators or piping blocking access to the throttle body.

3. Disconnect Electrical And Vacuum Lines: Carefully unplug throttle position sensor and actuator connectors and release any vacuum hoses or breather lines attached to the housing. Label connectors if necessary.

4. Unbolt Housing: Remove the mounting bolts securing the throttle body to the intake manifold. Support the unit and remove it from the engine bay.

5. Clean And Fit: Clean the mating surfaces on the intake manifold. Replace the throttle body gasket/seal with a new one. Fit the new housing, torque bolts to manufacturer specification, reconnect vacuum lines and electrical connectors.

6. Post-Fit: Perform throttle adaptation/idle relearn according to the vehicle’s procedure—either with diagnostic equipment or the specified key/on-off procedure—so the engine control unit relearns the throttle positions.

Installation Recommendations

• Always Disconnect The Battery Before Removal To Prevent Electrical Damage.
• Replace The Throttle Body Gasket When Installing A New Housing To Ensure A Proper Seal.
• Inspect And Clean The Intake Manifold Mating Surface; Remove Carbon Deposits That Could Affect Sealing.
• Use Proper Tools And Follow Torque Values From The Vehicle Manufacturer Where Available.
• Perform Throttle Adaptation/Idle Relearn After Installation To Avoid Driveability Issues.

Why This Part Usually Fails

Throttle body housings and the components they support are exposed to intake air contaminants and oil/vapour from the crankcase ventilation system. Over time, carbon and oily deposits build up on the throttle plate and inside the bore, causing the throttle plate to stick or the actuator to work harder. Electronic failures in the throttle position sensor or drive-by-wire actuator can also mimic housing-related faults. Mechanical damage, warped mating surfaces or degraded gaskets cause air leaks and incorrect idle characteristics. Depending on driving conditions and maintenance, issues commonly appear after substantial mileage, especially where frequent short trips or poor intake maintenance accelerate carbon buildup.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: 1.8 16V (1.8i), 2.0 16V (2.0i) — For Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 206, Peugeot 206+
• Product Codes: 9640796280, 1635R8
• Other Numbers: 1635.R8

Additional Notes

When replacing the throttle body housing, replace associated seals and ensure all connectors are properly seated. If fault codes persist after mechanical replacement, check sensors, wiring and the engine control unit for related errors. For professional workshops, follow the vehicle’s diagnostic and adaptation procedures with appropriate equipment to guarantee correct operation.

Commonly identified by product codes 9652682880 and 1635W8, this unit fits various models within the PSA group. Replacement of the throttle body is recommended when experiencing rough idling, reduced engine power, or fluctuating RPMs, often caused by carbon buildup or sensor wear. Installation typically involves disconnecting the air intake hose, electrical connectors, and removing mounting bolts, making it accessible for both professional mechanics and DIY enthusiasts.

Technical Information

• Manufacturer: PSA (Peugeot Citroën)
• Model: Compatible with 1.8i, 1.8 16V, 2.0i, 2.0 16V engines
• Product Codes: 9652682880, 1635W8
• Additional Numbers: OEM codes used by Citroën and Peugeot

Product Overview

This VDO throttle body assembly (throttle valve housing) is a direct-fit replacement for many Stellantis 1.8 16V and 2.0 16V petrol engines used in Citroën and Peugeot models. The unit controls air flow into the intake manifold and interfaces with the engine management system to regulate idle, transient response and overall engine torque. Commonly searched under part numbers 9650787380 and 1635X0, this throttle body is suitable for professional workshops and experienced DIY mechanics who maintain Citroën C4, C4 Picasso, C5 as well as Peugeot 307 and 407 models with the listed engines.

Technical Information

• Manufacturer: VDO
• Model: Citroën C4; Citroën C4 Picasso; Citroën C5; Peugeot 307; Peugeot 407
• Product Codes: 9650787380, 1635X0
• Additional Numbers: 123000
• Fitment Engines: 1.8 16V; 2.0 16V

Function And Benefits

The throttle body measures and controls the intake air volume entering the engine. Modern units integrate an electric motor/actuator and position sensor to provide precise control (drive-by-wire). A quality VDO unit ensures smooth idle, accurate throttle response and reliable communication with the engine ECU. Replacing a worn or malfunctioning throttle body restores engine drivability, reduces hesitation or stalling and can eliminate throttle-related fault codes.

Installation Recommendations

• Disconnect the negative battery terminal before beginning work to avoid electrical damage.
• Remove air intake hose and any sensors or vacuum lines that obstruct access to the throttle body.
• Unplug the electrical connector and unbolt the throttle body from the intake manifold. Keep gasket surface clean and replace the gasket if damaged.
• After installation, some vehicles require throttle adaptation/initialization using a diagnostic tool (throttle relearn). On certain PSA models adaptation via DiagBox/Lexia may be necessary to ensure correct idle and response.
• Recheck for air leaks at the intake flange and ensure all hoses and connectors are properly refitted.

Most Common Failure Reasons

Throttle bodies on these engines typically fail due to carbon and oil deposits that cause the throttle plate to stick or operate sluggishly. Electronic failures include faulty position sensors, actuator motor wear, or intermittent wiring/connectors. Symptoms include erratic idle, poor throttle response, limp-home mode or stored throttle-related fault codes. Driving conditions with frequent short trips and heavy idling accelerate carbon build-up.

Replacement Procedure (High-Level)

• Prepare: Park on level surface, engage parking brake, and disconnect the negative battery terminal.
• Access: Remove the air intake hose and any obstructing components to reach the throttle body.
• Disconnect: Unplug electrical connector(s) and any vacuum lines attached to the throttle body.
• Remove: Unscrew the mounting bolts and remove the throttle body from the intake manifold. Clean the mating surface.
• Install: Fit new gasket if required, mount the replacement throttle body, hand-tighten then torque bolts to manufacturer specification where available.
• Reassemble: Reconnect electrical connectors, hoses and air intake components. Reconnect the battery.
• Finalize: Perform throttle adaptation/initialization if required and clear related fault codes with a diagnostic tool. Verify idle and throttle response during a test run.

Compatibility And Notes

Fits engines: 1.8 16V and 2.0 16V used in selected Citroën and Peugeot models (Citroën C4, C4 Picasso, C5; Peugeot 307, 407). Common reference numbers: 9650787380, 1635X0. Always confirm engine code and part number match the vehicle’s requirements prior to installation. The unit supplied has been tested and is fully functional.

The throttle body 1635R4 / 1635V1 is a direct-fit air control unit for PSA Citroën & Peugeot 1.8i and 2.0i 16V petrol engines. It regulates intake airflow to the engine management system, ensuring accurate throttle response, stable idle and consistent running. This part is commonly searched for by its product codes (1635R4, 1635V1) and is designed for professional workshops and experienced DIY mechanics looking for a correct-fit replacement.

Features & Benefits

• Direct fit for many PSA 1.8 and 2.0 16V petrol engines
• Restores throttle response, idle stability and drivability
• Compatible with factory electrical connectors and wiring
• Robust throttle plate and shaft design for long service life

Function And Symptoms Of Failure

The throttle body controls the amount of air entering the intake manifold under command from the engine control unit (ECU). Common symptoms of a failing or dirty unit include rough or fluctuating idle, reduced throttle response, stalling at low RPM, and illumination of the check engine light with related throttle or idle control fault codes. Failures are often caused by carbon build-up on the throttle plate, worn shaft/bearings, faulty throttle position sensor (TPS) or electronic actuator faults, and vacuum or gasket leaks.

Replacement And Installation

Typical replacement steps: disconnect the negative battery terminal; remove the air intake duct and associated sensors to gain access; unplug the electrical connector(s); unbolt the throttle body from the intake manifold; remove the old gasket and fit a new gasket when installing the replacement unit; torque mounting bolts to manufacturer specification; reconnect electrical connectors and intake ducting; clear fault codes and perform throttle relearn/adaptation if required by the vehicle ECU. Always inspect hoses and sealing surfaces for damage and replace the gasket to prevent vacuum leaks.

Maintenance

Regular inspection and cleaning of the throttle bore and plate during scheduled services can prevent most drivability issues. There is no fixed replacement interval; lifespan depends on driving conditions and maintenance. Many throttle bodies remain serviceable beyond 100,000 km if kept clean and properly sealed.

Technical Information

• Manufacturer: PSA / Citroën Peugeot
• Model: 1.8i And 2.0i 16V Petrol Engines (Citroën / Peugeot)
• Product Codes: 1635R4, 1635V1
• Other Numbers: 1635R4 | 1635V1

Compatibility Note

This unit is referenced by the listed product codes and fits multiple PSA applications. Always confirm compatibility by matching the part number on your old unit or checking the vehicle vehicle identification against OE references before purchase.