Description
Delphi intake throttle valve for 1.6 HDi engines for Citroën and Peugeot vehicles. Most of these used parts have a damaged lower mount and must be secured with tape.
Product Overview
This Delphi electronic intake throttle valve is designed for 1.6 HDi diesel engines used on a range of Citroën and Peugeot models. The component controls airflow into the intake tract to help manage idle speed, EGR/recirculation behavior and engine response. Offered as a used unit, some items may show wear on the lower mount and require reinforcement during installation.
Technical Information
- Manufacturer: Delphi
- Model: 1.6 HDi
- Product Codes: 9657485480, 0345E5
- Other Numbers: NFP
Compatibility
Common applications include (engine: 1.6 HDi):
- Citroën C4
- Citroën C4 Picasso
- Citroën C5
- Peugeot 207
- Peugeot 307
- Peugeot 308
Function And Symptoms
The throttle valve regulates intake airflow and provides input for idle control and EGR management on diesel engines. When faulty, symptoms typically include unstable idle, hesitation, reduced throttle response, increased smoke at idle, or illumination of engine warning lights. Electrical faults in the actuator or position sensor can also trigger fault codes and limp-home behaviour.
Replacement Procedure (Overview)
Intended for professional mechanics and experienced DIYers. Typical replacement steps:
- Park vehicle on level ground, remove ignition key and ensure engine is cool.
- Disconnect the negative battery terminal before starting work.
- Remove intake ducting and airbox components to access the throttle valve.
- Unplug the electrical connector and any vacuum hoses or sensors attached.
- Unscrew the mounting bolts and remove the throttle valve assembly. Inspect the lower mount for damage (many used units have a compromised lower bracket).
- Fit the replacement unit using new gaskets or O-rings where applicable. Reuse or reinforce the lower mount as required (see Installation Recommendations).
- Reconnect electrical connectors, reassemble intake plumbing and reconnect the battery.
- Perform throttle adaptation or idle relearn according to the manufacturer’s procedure or using diagnostic equipment if required.
Installation Recommendations
- Always disconnect the battery before removal and follow the vehicle manufacturer’s instructions.
- Replace inlet gaskets or seals to prevent air leaks. Ensure mating surfaces are clean and free of debris or carbon buildup.
- Inspect the electrical connector for corrosion and the wiring harness for damage; repair as needed.
- If the lower mounting bracket is bent or damaged (a common issue on used parts), reinforce or secure it during installation—temporary tape may be used for transport, but use a secure mechanical fix for safe long-term operation.
- After installation, perform throttle adaptation/idle relearn with a diagnostic tool or follow the vehicle-specific procedure to ensure proper idle and response.
Most Common Failure Causes
- Carbon and soot buildup from diesel combustion causing the valve to stick or operate sluggishly.
- Wear or failure of the electronic actuator or position sensor, leading to incorrect valve positioning.
- Physical damage to the mounting bracket—lower mount commonly deformed on used units.
- Corroded electrical contacts or damaged wiring causing intermittent faults.
- Faulty seals or air leaks on reassembly causing poor idle and drivability issues.
Notes For Buyers
Searches for this part are often performed using product numbers (e.g. 9657485480, 0345E5). The unit is a used Delphi throttle valve for 1.6 HDi engines; inspect the lower mount before installation and plan reinforcement if necessary. Suitable for mechanics and skilled DIY enthusiasts familiar with intake system service and throttle adaptation procedures.
