Description
Air Connection For The Intercooler Of 1.6 HDI 8V And 1.2 81 kW Engines For Citroën And Peugeot Vehicles
This intake hose connects the turbocharged engine to the intercooler on select Citroën and Peugeot petrol and diesel applications. Designed as a direct-fit replacement for worn or damaged charge-air piping, the hose restores proper boost flow, improves throttle response and reduces the risk of underboost conditions. Ideal for professional workshops and DIY mechanics who need a reliable OE‑style part, this hose is commonly searched by part numbers 9683725580 and 0382NN.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4 II; Citroën C4 Picasso; Peugeot 308
- Product Codes: 9683725580, 0382NN
- Additional Numbers: 0382NN
Application
Fits turbocharged 1.6 HDI 8V engines and selected 1.2 81 kW engines in Citroën and Peugeot passenger cars. Suitable for models listed above; always verify engine type and part number before installation. Frequently used where the original intake/charge-air hose is cracked, collapsed or oil-permeated.
Function And Common Symptoms
The hose routes compressed intake air between the turbocharger and the intercooler (or intercooler outlet to intake tract, depending on routing). Its role is to maintain boost pressure and deliver cool, dense air to the engine. When the hose leaks or fails, symptoms include reduced engine power, slower acceleration, irregular boost behavior, turbo surge or hesitation, and sometimes an illuminated engine management lamp related to boost/air flow anomalies.
How To Replace
- Allow the engine to cool and depressurize the intake system.
- Locate the damaged hose between the turbocharger and intercooler (or intercooler outlet). Remove any engine covers obstructing access.
- Loosen and remove clamps at both ends of the hose. Inspect mating surfaces on turbo/intercooler for damage or debris.
- Fit the new hose in position, ensuring correct orientation and full seat on connection spigots.
- Install new or serviceable clamps and secure evenly. Do not overtighten clamps to avoid deforming the hose.
- Start the engine, check for air leaks at installation points, and perform a road test to confirm restored boost and engine response.
Installation Recommendations
- Replace clamps when fitting a new hose; OEM-style constant-tension or high-quality worm-drive clamps give best results.
- Inspect adjacent pipes, intercooler and turbocharger connections for oil contamination or damage; clean mating surfaces before assembly.
- When routing the hose, avoid sharp bends and contact with hot exhaust components; secure with existing brackets or clamps to prevent rubbing.
- After installation, verify boost pressure and perform a leak check under load if possible.
Reason Why The Part Most Commonly Fails
- Age and Heat Cycling: Repeated heating and cooling causes rubber and silicone materials to harden and crack over time.
- Oil Contamination: Turbocharger oil leaks or excessive crankcase blow-by can degrade hose material and accelerate failure.
- Mechanical Damage: Abrasion, improper clamp installation or contact with surrounding components can cause cuts or perforations.
- Overboost or Engine Modifications: Elevated boost pressures from tuning or a failing wastegate can lead to premature hose rupture.
Replacing a worn intake/intercooler hose is a cost-effective repair that restores drivability and protects the turbocharging system. Use the part numbers above to find the correct direct-fit hose for the specified Citroën and Peugeot models.
