Description
Intake throttle valve Delphi 1.6 HDi for Citroën and Peugeot vehicles. Most of these used units have a bent lower mounting bracket and may need to be secured with tape.
Product Overview
This intake throttle valve (throttle body) is a direct-fit Delphi unit for 1.6 HDi engines, commonly fitted to Citroën and Peugeot models. It regulates airflow in the intake tract to stabilise idle, assist EGR function and support smooth deceleration. The part is often searched for by its product codes 9657485480 and 0345E5, so listing these numbers in the order will help you find the correct replacement quickly.
Compatibility
- Citroën C4
- Citroën C4 Picasso
- Citroën C5
- Peugeot 207
- Peugeot 307
- Peugeot 308
Technical Information
Function And Symptoms
The throttle valve controls airflow through the intake manifold. In 1.6 HDi diesel engines it helps maintain stable idle, supports exhaust gas recirculation (EGR) control and contributes to engine braking behavior. When the valve or its actuator/potentiometer fails, common symptoms include rough idle, stalling, irregular throttle response, illuminated engine warning light and stored fault codes related to throttle/airflow.
Why This Part Fails Most Often
- Carbon and soot buildup in the throttle plate and housing, common on diesel engines, which restricts movement.
- Wear or failure of the electronic actuator or its position sensor (potentiometer), causing incorrect feedback to the ECU.
- Mechanical damage to the mounting bracket (the lower mounting bracket on many used units is often bent or damaged).
- Corrosion or water ingress affecting contacts and connectors.
Replacement Procedure (Overview)
- Prepare: Work on a cool engine in a well-ventilated area. Gather basic hand tools, torque wrench and, if available, a small throttle cleaner for inspection.
- Safety: Always disconnect the vehicle battery before starting to avoid short circuits and protect electronic components.
- Removal: Remove the intake hose and airbox as needed, unplug the electrical connector, remove mounting screws securing the throttle valve and extract the unit from the intake manifold.
- Installation: Fit the new unit, tighten mounting screws to manufacturer torque where specified, reconnect the electrical connector and intake hoses.
- Aftercare: Some vehicles require a throttle relearn or idle adaptation via diagnostic tool to restore correct idle and response. If you see fault codes after replacement, a diagnostic reset and adaptation may be necessary.
Installation Recommendations
- Disconnect the battery before any removal or installation and follow the vehicle manufacturer’s instructions to avoid damage.
- Check the lower mounting bracket on this part before fitting; if it is bent, secure it appropriately or replace the bracket to ensure correct alignment. Many used units show a bent lower bracket and may need temporary securing with tape during fitment.
- Do not force the throttle plate; ensure clean mating surfaces and correct gaskets/seals to prevent air leaks.
- After installation, clear stored faults and perform an idle adaptation if required by the vehicle.
Notes For Mechanics And DIYers
Part numbers 9657485480 and 0345E5 are commonly used to identify this Delphi throttle valve—include these codes when searching or ordering. Inspect related components such as intake hoses, vacuum lines and the EGR system when replacing the throttle valve, as soot or faults elsewhere can accelerate recontamination or cause recurring symptoms.
