Part description

This DELPHI acceleration/impact sensor (ABL) is an important element of the passive safety system – it evaluates the acceleration in the event of an impact and transmits the information to the control system so that safety features such as airbags and pyrobelts can be activated. If you are dealing with a malfunction of the airbag system or replacement after damage, a correctly selected sensor is key to proper function and safety.

The part is suitable for Peugeot 307 CC according to the listed product codes. When choosing, we recommend that you always compare the numbers on the original part – for these sensors, matching the markings is essential.

Technical information

• Manufacturer: DELPHI
• Model: Peugeot 307 CC
• Other numbers: NFP

Product codes

• Product codes: 9644904380, 5WK42991, 8216Z2

Installation recommendations

Generally/typically for crash sensors and airbag system components, installation requires the utmost care and strict adherence to safety procedures. The exact procedure may vary depending on the specific design of the car.

1) Before assembly

• Check if the product numbers (9644904380 / 5WK42991 / 8216Z2) match the old part.
• Visually verify that the sensor is not cracked, deformed, bent or mechanically damaged.
• Check the connector and pins – they must not be bent, oxidized or loose.
• If the car has been in an accident, check that there are no damaged wiring/connectors in the vicinity (typically the harness to the sensor).

2) Necessary tools and materials

• Ordinary hand tools (ratchet/extension according to design)
• Suitable means for gentle cleaning of connectors (without aggressive chemicals)
• Diagnostics to check the SRS/airbag system (to verify function after installation)

3) Step-by-step assembly procedure

1. Turn off the ignition and secure the vehicle against movement.
2. Disconnect the battery and wait a reasonable amount of time for the airbag system to deactivate (according to the service procedure).
3. Access the original sensor (specific location varies by design).
4. Disconnect the electrical connector carefully – do not pull on the wiring.
5. Dismantle the original sensor.
6. Compare the old and new piece (numbers, connector, mounting).
7. Mount the sensor in its original position and seat it precisely in the holder.
8. Connect the connector so that it clicks properly and without straining the wiring.
9. Check that the surrounding wiring harness is not pinched and is routed securely.
10. Connect the battery.

• 4) Post-assembly checks and test drive/function verification

  • Turn on the ignition and watch the airbag/SRS light – it must behave as standard according to the car.
  • Run a diagnostic check and verify that the system is not reporting errors related to the sensor or its circuitry.
  • If the airbag light does not come on/off normally, do not continue to use the car until the system is professionally inspected.

  5) The most common assembly mistakes + how to avoid them

  • Not disconnecting the battery before working on the SRS system → always disconnect and observe the safety pause according to the procedure.
  • Exchanging the part according to appearance without checking the number → the matching of codes (9644904380 / 5WK42991 / 8216Z2) always decides.
  • Damage to the connector/pins during disassembly → disconnect carefully, do not pull on the cables.
  • Bad seating in the mounting → the sensor must be mounted precisely and firmly in its original position.

  Reasons why the part is damaged

  • Accident/collision – the sensor may be mechanically damaged or out of tolerance after a collision.
  • Moisture and corrosion in the connector – leaks will cause poor contact and SRS system errors.
  • Damage to the wiring (broken wire, pinched harness) – often manifests as sensor failure.
  • Incompetent handling during previous repairs – damaged pins, unclosed connector, inappropriate cleaning.
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