Description
Turbo hose, intake air resonator 1.4 HDi for Citroën and Peugeot vehicles. It is from Citroën C3 2003, engine code 8HY, 66 kW.
This intake resonator and turbo hose assembly for the 1.4 HDi powertrain improves air-flow smoothing and reduces intake noise while maintaining proper boost delivery to the engine. Ideal for professional mechanics and experienced DIYers, this part is commonly searched by its OEM references (9647569980, 144036) and is suited for applications found on Citroën C3 (2003) and related Peugeot models such as the 1007. Replacing a worn or damaged resonator restores correct intake tract sealing, prevents boost leaks and can solve erratic idling or loss of low-end torque caused by air leaks.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C3 (2003) 1.4 HDi, Engine Code 8HY, 66 kW; also used on compatible Peugeot 1007 applications
- Product Codes: 9647569980, 144036
- Additional Numbers: NFP
Fitment And Function
The part functions as an intake resonator and turbo hose section, positioned in the charged air path to dampen pressure pulses and reduce intake noise. It connects elements of the turbo/intercooler/intake plumbing and must maintain an airtight seal under boost. Correct fitment ensures stable turbo response and protects the intake system from unmetered air leaks.
Recommended Installation
- Allow the engine to cool before beginning work. Release any residual boost pressure by cranking the engine briefly with the intake removed if necessary, following safe workshop procedures.
- Remove the airbox or other obstructing components to gain access to the resonator and turbo hose clamps.
- Loosen and remove clamps, then carefully detach the old hose/resonator. Inspect adjoining pipes, intercooler and clamps for damage or oil contamination.
- Fit the new resonator ensuring correct orientation and full seat on mating spigots. Use new quality clamps where possible and tighten evenly—avoid overtightening plastic fittings.
- After installation, start the engine and check for boost leaks, unusual noises and secure seating at idle and under light load. Road-test to confirm restored boost response.
Most Common Failure Reasons
- Aging and Heat Exposure: Rubber and silicone components harden, crack or become brittle over time due to engine bay heat cycles.
- Oil Contamination: Turbo oil leaks or excessive crankcase vapors contaminate the hose, accelerating degradation and causing soft spots or collapse under vacuum/boost.
- Mechanical Damage: Abrasion from contact with nearby components, impact damage during previous repairs, or improper clamp installation can lead to tears and leaks.
- Clamp Failure and Poor Sealing: Corroded or incorrectly sized clamps allow slow leaks that worsen over time and reduce engine performance.
Searchable OEM codes 9647569980 and 144036 make locating the correct replacement straightforward for workshops and DIY enthusiasts. Replace this resonator when you find visible cracks, oil-soaked sections, or loss of boost pressure to restore reliable turbo performance and intake sealing.
