Description
Air inlet connector for 1.6 e-HDi engines for Citroën and Peugeot vehicles.
This replacement air inlet connector is designed for 1.6 e-HDi Diesel engines used in a range of Citroën and Peugeot models. It restores airtight routing of intake air between the air filter/turbocharging system and the intake tract, helping maintain correct turbo response, engine breathing and emissions control. Ideal for professional workshops and DIY mechanics who search by part number (9688500380 / 9678406580 / 0345G2), the connector offers a direct-fit solution to eliminate intake leaks, rough idling and loss of boost caused by cracked or hardened hoses.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: 1.6 e-HDi Engines
- Product Codes: 9688500380, 9678406580, 0345G2
- Additional Numbers: OEM References Used Across PSA/PEUGEOT/CITROËN Parts Catalogues
Fitment / Vehicle Applications
Commonly fitted to the following models with 1.6 e-HDi engines (check engine and year for correct variant):
- Citroën C3 Picasso
- Citroën C4 II
- Citroën C4 Picasso
- Peugeot 3008 I
- Peugeot 308
- Peugeot 5008 I
Function
The connector is part of the air intake ducting and ensures sealed airflow between intake components. A leak at this point can cause unmetered air to enter the engine, leading to incorrect air–fuel ratio, unstable idle, reduced turbo efficiency and potential fault codes from the engine management system.
How To Replace
Replacement is straightforward for a trained mechanic or competent DIYer. Allow the engine to cool. Locate the failed connector in the intake tract (between air box, intercooler or turbocharger and intake manifold depending on vehicle layout). Remove clamps or fasteners securing the old connector, detach any attached sensors or hoses, and fit the new connector in the correct orientation. Use new stainless or OEM clamps and ensure all sealing faces are clean before assembly. Start the engine and inspect for leaks and correct idle.
Installation Recommendations
- Always Replace Clamps: Use new worm-drive or Oetiker clamps as appropriate to ensure a reliable seal.
- Check Adjacent Components: Inspect air filter housing, turbo inlet and intercooler piping for damage or oil contamination while replacing the connector.
- Clean Mating Surfaces: Remove dirt, oil and old seal residues to ensure proper sealing and fitment.
- Test After Fitment: Start the engine and verify there are no air leaks, unusual noises or fault codes.
- Allow Engine To Cool Before Work: Work on the intake system when cold to avoid burns and to ensure correct hose fitment.
Why This Part Most Commonly Fails
Failures are usually caused by age-related degradation and operating conditions: rubber and plastic materials harden and crack from repeated heat cycles, exposure to engine bay oils and road contaminants, or from vibration and incorrect clamp tension. Small tears or loose clamps allow unmetered air into the system, which is the most frequent symptom leading to replacement.
Notes For Pros
Searches for this component are often performed by part number; listing the OEM references (9688500380 / 9678406580 / 0345G2) helps technicians and parts departments find the correct match quickly. When replacing, consider also checking for oil contamination that could indicate turbocharger seal wear.
