Description
Throttle Body For 2.0 HDi RHR Engines For Citroën And Peugeot Vehicles. Assembled Air Metering Unit.
This genuine-style throttle body (air intake flap) is designed for 2.0 HDi RHR engines used in a range of Citroën and Peugeot models. Direct-fit replacement for OE references 9647474880 and 0345C4, the unit restores accurate air metering and throttle response for reliable idle control and drivability. Ideal for professional workshops and experienced DIY mechanics who search by product code or OE number.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën C8; Peugeot 307, Peugeot 407, Peugeot 807 (2.0 HDi RHR)
- Product Codes: 9647474880, 0345C4
- Other Numbers: 0345C4 | 9647474880
Function
The throttle body controls the amount of intake air entering the engine by adjusting the position of an internal flap or valve under electronic control. On 2.0 HDi RHR engines the assembly often incorporates the air metering mechanism and an electronic actuator or stepper motor along with position sensing to maintain stable idle, prompt throttle response and correct air/fuel balance during load changes.
Common Faults And Typical Symptoms
- Carbon Build-Up: Soot and oil residues from EGR and intake passages cause the flap to stick or move sluggishly, leading to rough idle, hesitation or stalling.
- Electrical/Actuator Failure: Worn motor or position sensor faults result in poor throttle control, reduced engine power or limp-home mode.
- Connector Or Wiring Issues: Corrosion, damaged pins or intermittent wiring can trigger fault codes and unpredictable behaviour.
- Vacuum Or Intake Leaks: Leaks upstream or poor sealing at the gasket affect idle and response even when the throttle body itself is functional.
Replacement Procedure (Overview)
- Safety First: Always disconnect the battery before starting work to prevent electrical damage and unintended actuator movement.
- Access: Remove the air intake hose and any components obstructing access to the throttle body.
- Disconnect: Unplug the electrical connector and any vacuum lines attached to the unit.
- Remove: Unbolt the throttle body from the intake manifold. Keep mounting hardware and note gasket condition.
- Fit New Unit: Install the replacement with a new gasket if required, tighten bolts to manufacturer specifications and reconnect electrical and vacuum lines.
- Initialisation/Relearn: After installation, perform throttle adaptation/relearn using a diagnostic tool. Some vehicles require an adaptation procedure to restore correct idle and throttle mapping.
Installation Recommendations
- Use A New Gasket: Replace the intake gasket or seal to ensure airtight mounting and avoid vacuum leaks.
- Clean Surroundings: Clean the mating surfaces and the intake tract to reduce contamination transfer to the new unit.
- Diagnostic Relearn: Perform throttle adaptation with PSA diagnostic equipment (DiagBox / Lexia / PP2000) or follow the specified relearn steps in the service manual to avoid idle irregularities.
- Inspect Wiring: Check connector pins and harness for corrosion or damage before reconnecting.
- Professional Service: If uncertain about adaptation or electrical diagnosis, have the unit installed and configured by a qualified technician with appropriate PSA service tools.
Why This Part Fails Most Often
The predominant cause of failure is internal carbon contamination from EGR and recirculated exhaust gases that accumulates on the butterfly and shaft, causing sticking and false position readings. Secondary causes include wear or failure of the electronic actuator/stepper motor and sensor failures, plus connector corrosion or wiring faults. Regular maintenance of the intake and EGR system helps extend service life.
Notes For Buyers
Searches are often performed by OE numbers 9647474880 and 0345C4 — include these codes when looking for direct-fit throttle body replacements. Suitable for experienced mechanics and competent DIY installers working on 2.0 HDi RHR Citroën and Peugeot models listed above.
