Description
Left Front Pyrotechnic Pretensioner For Citroën C2, C3 And Pluriel — Driver’s Seat.
This left front pyrotechnic seatbelt pretensioner is an OEM-compatible safety component designed for Citroën C2, C3 and C3 Pluriel vehicles (also commonly referenced for Peugeot 1007 fitment). The unit tightens the driver’s seatbelt instantly in a severe impact to reduce forward occupant movement and works together with the airbag system to improve crash protection. Commonly searched under OE codes such as 9640676877 and 8973TH, this part is intended for professional replacement in airbag-equipped vehicles and is suitable for mechanics and experienced DIYers who follow SRS safety procedures.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C2, Citroën C3, Citroën C3 Pluriel, Peugeot 1007
- Product Codes: 9640676877, 8973TH
- Additional Numbers: NFP
Function And Benefits
The pyrotechnic pretensioner is a single‑use safety device that activates during a collision to remove slack from the seatbelt webbing within milliseconds. By reducing occupant travel before airbag deployment, it enhances occupant retention and reduces injury risk. Benefits include direct OEM fit, straightforward mechanical replacement under the seat, and clear cross-reference by OE part numbers for fast procurement.
Replacement And Installation
Installation involves handling of SRS components and should be performed by trained personnel or experienced DIYers observing strict safety measures:
- Disconnect the vehicle battery negative terminal and wait at least 10 minutes to allow SRS capacitors to discharge.
- Move the seat to its furthest position as needed and remove the relevant trim panels to access the pretensioner mounting point at the base or side of the seat.
- Unbolt the pretensioner from its bracket and carefully disconnect the electrical connector (avoid pulling on wires; release locking tabs first).
- Install the new pretensioner in the correct orientation, secure mounting bolts and torque to the manufacturer’s specification where available.
- Reconnect the electrical connector, reassemble trim, reconnect the battery, and verify that the SRS/airbag warning light behaves normally; a diagnostic scan may be required to clear stored fault codes after replacement.
Handle the unit gently and store in a dry environment until installation. Do not attempt repairs or disassembly of the pretensioner cartridge.
Why This Part Fails Most Often
- Deployment After A Collision: The pretensioner is pyrotechnic and designed to fire once during a crash—after deployment it must be replaced.
- Electrical Faults: Corroded connectors, damaged wiring or short circuits in the SRS circuit can render the pretensioner inoperative or trigger fault codes.
- Corrosion And Moisture: Long‑term exposure to moisture can corrode connectors and mechanical parts, affecting reliability.
- Impact Or Mechanical Damage: Physical damage to the seat structure or mounting points after an accident can compromise the pretensioner’s fitment or operation.
- Age And Environmental Stress: Although not a regularly replaced service item, extreme aging or prior improper handling can lead to failure.
Because this is a safety-critical, single‑use device that interacts with the airbag system, correct diagnosis and professional handling are strongly recommended to restore full occupant protection after removal or deployment. The provided OE codes (9640676877, 8973TH) are often used when searching for compatible replacements.
