Description
Air intake connection to the turbo of the 1.6 HDI engine for Citroën and Peugeot vehicles.
This turbo intake hose is designed for the 1.6 HDi turbocharged engines used across a range of Citroën and Peugeot models. It routes compressed intake air from the airbox/intercooler to the turbo or from the turbo to the intercooler (depending on application), ensuring stable boost delivery and engine performance. Often searched by part numbers, the item increases chances of correct fitment during repairs and routine maintenance.
Features include durable elastomer construction resistant to oil vapors and heat, precise fit to mating flanges, and compatibility with OE-style clamps. A properly functioning turbo intake hose prevents boost leaks, reduces turbo lag and helps maintain fuel efficiency and emissions performance—critical for workshop repairs and DIY replacements.
Technical information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 1.6 HDi (turbocharged diesel)
- Product Codes: 9656953680, 9687883780
- Additional Numbers: 143453, 1434E1, NFP
- Compatible Vehicles: Citroën Berlingo, Citroën C3, Citroën C3 Picasso, Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën Xsara Picasso, Peugeot 307, Peugeot 308, Peugeot 407, Peugeot Partner
How It Works
The hose carries pressurized intake air between turbocharger components (airbox, intercooler, turbo inlet/outlet). It must maintain a pressure-tight seal under boost and resist heat, oil mist and engine bay vibration. Any leak reduces boost pressure, leading to loss of power, increased smoke, rough running or fault codes related to turbocharging and boost control.
Common Failure Causes
Most failures are caused by age-related hardening and cracking of the rubber/elastomer, oil contamination from crankcase ventilation, heat degradation near exhaust/engine hotspots, mechanical abrasion from rubbing against nearby components, or failing clamps that allow the hose to slip off under boost. Soot and oil deposits inside the intake system can accelerate deterioration.
Replacement And Installation Recommendations
- Inspect surrounding components (clamps, pipes, intercooler seals) and replace any worn clamps or gaskets at the same time.
- Relieve intake system pressure and allow the engine to cool before starting work.
- Loosen and remove the retaining clamps, then carefully disconnect any attached sensors or vacuum lines to avoid damage.
- Remove the old hose and clean the mating surfaces and pipe ends of oil, dirt and soot to ensure a reliable seal.
- Fit the new hose in the correct orientation, seat it fully on the pipes, and use quality OE-style clamps tightened evenly. Avoid overtightening that could deform the hose.
- After installation, run the engine, check for boost leaks and proper turbo response. Perform a short road test to confirm performance under load.
Suitable for professional workshops and competent DIYers. Replacing a degraded turbo intake hose early prevents secondary damage to turbocharger and engine management systems and restores full boost performance.
