Description
Throttle valve, throttle body inlet for 1.4 16V and 1.6 16V engines for CITROËN and PEUGEOT vehicles.
This genuine-style throttle valve / throttle body throat is intended as a direct-fit replacement for Citroën and Peugeot 1.4 16V and 1.6 16V petrol engines. Ideal for professional workshops and experienced DIY mechanics, the unit restores correct air intake metering, improves idle stability and throttle response when the original part is worn or contaminated. Frequently searched under OE numbers 9647925480 and 1635W2, it fits common models from the Citroën and Peugeot ranges and is a practical spare part to keep for routine engine repairs and maintenance.
Technical information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Applicable To 1.4 16V And 1.6 16V Engines (see Compatibility)
- Product Codes: 9647925480, 1635W2
- Additional Numbers: NFP
Compatibility
Commonly used on the following models (depending on engine and year):
- Citroën Berlingo
- Citroën C2
- Citroën C3
- Citroën C3 Pluriel
- Citroën C4
- Peugeot 206
- Peugeot 307
- Peugeot Partner
Function
The throttle valve controls the amount of air entering the engine combustion chambers. In modern engines it works together with the engine management system to regulate idle speed, accelerator response and fuel-air ratio. A correctly functioning throttle body is essential for smooth running, reduced emissions and predictable throttle behaviour.
Symptoms Of A Faulty Throttle Body
- Rough or unstable idle and frequent stalling
- Poor throttle response, hesitation or surging under acceleration
- Illuminated engine warning light (check engine)
- Increased fuel consumption or irregular engine behaviour after cold start
Installation Recommendations
- Before starting work, disconnect the negative battery terminal to avoid electrical faults and to reset the engine control if necessary.
- Remove the intake hose and electrical connector to the throttle body. Inspect and, if needed, replace the throttle body gasket.
- Clean surrounding intake passages to prevent contamination of the new unit during fitment.
- Fit the replacement unit and tighten fasteners to the manufacturer’s torque specification.
- After mechanical installation, perform throttle body adaptation or idle relearn using an appropriate diagnostic tool if required by the vehicle ECU.
- Inspect wiring and connectors for corrosion or damage before reconnecting. Replace any brittle hoses or damaged seals to prevent vacuum leaks.
- Always follow the vehicle manufacturer’s service procedures during removal and installation.
Why This Part Most Often Fails
Throttle bodies commonly fail due to carbon and oil deposits that restrict the plate movement or the airflow sensor, electrical faults in the throttle position sensor or actuator wiring, and mechanical wear of the butterfly plate pivot. Vehicles used predominantly for short urban trips are more prone to carbon buildup. Moisture ingress or corroded electrical connectors can also cause intermittent faults.
Notes For Mechanics And DIYers
Keep the OE reference numbers (9647925480, 1635W2) to hand when searching for or ordering the part. Proper cleaning of intake passages and ensuring a good electrical connection will extend the service life of the replacement throttle body. If symptoms persist after replacement, check for intake leaks, vacuum hoses, EGR function and the engine management system for stored fault codes.
