Description
Air intake resonator with vacuum flap for CITROEN C4 and PEUGEOT 307 cars with 2.0i 130kw engines
Part description
This filter box / intake resonator (also referred to as an air intake resonator) with a vacuum flap is a part designed for the proper functioning of the intake – it helps to stabilize the air flow and participates in the cultivated operation of the engine. If you are dealing with a replacement after a plastic crack, a leak or a malfunctioning valve, the part with the numbers 9643586380 and 9646189680 is commonly searched for precisely by these codes.
A suitable solution for repairing intake without unnecessary compromises – during assembly, it is crucial to check the tightness of the connections and the condition of the vacuum tubes, so that the flapper works as it should.
Technical information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4, Peugeot 307
- Other numbers: 143450, 143439, NFP
Product codes
- Product codes: 9643586380, 9646189680
Installation recommendations
Generally/typically applies to the replacement of the resonator/filter box with the vacuum valve at the intake, the exact procedure may differ depending on the specific design of the car.
1) Before assembly
- Compare the old and new piece: identical shaping, neck diameters, handles and hose connections.
- Check the vacuum valve – smooth operation, undamaged rod/axle, cracks in the body of the part.
- Focus on sealing surfaces and necks: cracks, deformations, broken locks, run-out seating edges.
- Check the condition of the connected hoses and clamps (especially the vacuum line) – hardened or cracked hoses can simulate a part failure.
2) Necessary tools and materials (in general)
- Normal set of gola/ratchet and bits, screwdrivers.
- Pliers for clips/hose clips.
- Cleaning agent for degreasing and rag (for contact surfaces).
- Possibly new clips or small fasteners if the original one is damaged.
3) Step-by-step assembly procedure
- Turn off the ignition and let the engine cool down.
- Make the suction area accessible (depending on the design, remove the covers that get in the way).
- Mark the hoses/vacuum lines so they don’t get mixed up during assembly.
- Release the clamps on the connected hoses and carefully pull the hoses off (without prying to break the throat).
- Disconnect the vacuum tube/line from the damper (if fitted).
- Unfasten the part (screws/mounts) and remove the old resonator/filter box.
- Clean the seating surfaces and check that there are no dirt or plastic fragments left in the suction line.
- Sit the new part in the correct position, without tension or crossing.
- Connect the hoses to the correct ports and fit the clips; tighten so that the joint is tight, but the plastic is not deformed.
- Reconnect the vacuum line to the valve and check that it is secure and not broken.
- Reinstall any covers/parts that were removed.
- Perform a visual inspection of the entire suction line for chafing, pinching or looseness.
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4) Post-assembly checks and test drive/function verification
- Start and check for hissing/fake air around the connections.
- Verify that the engine responds smoothly to the throttle and does not run erratically.
- After a short ride, recheck the hose clamps and seating.
5) The most common assembly mistakes + how to avoid them
- Swapping vacuum tubes – mark before disassembly, ideally take a photo.
- Leaky connections due to a poorly seated hose or a weak clip – slide the hose all the way in, place the clip in the correct groove.
- Plastic neck cracking when prying – release the hoses by twisting and gradually, not by force.
- Tightening the part in the fixture – first place the part correctly, only then gradually tighten the fastening.
Reasons why the part is damaged
- Plastic aging and thermal stress in the engine compartment – brittleness and subsequent cracks.
- Vibration of the motor and long-term stress on the mounts – squeezing out the mounts or breaking off the holders.
- Leaks and false air intake due to hardened hoses/clips – consequently higher stress on the part and damper.
- Damage to the vacuum control (tubing, leaks) – the valve does not work properly and the mechanism can be damaged over time.
- Improper disassembly (prying, breaking clips) – cracked necks or deformed seating surfaces.
