Description
Siemens acceleration sensor for Peugeot 307 vehicles
High-quality Siemens acceleration sensor designed for Peugeot 307 models. This replacement sensor carries the common OEM references used in parts searches (9649474680, 5WK42989, 8216AL) and is aimed at professional technicians and experienced DIYers who need a reliable component for stability and safety system repairs. Ideal for marketplace listings and searches, the description includes key part numbers and common fault symptoms to help you identify compatibility quickly.
Function And Application
The acceleration sensor monitors longitudinal (and in some systems lateral) vehicle acceleration and provides critical input to electronic stability control (ESP), traction control, ABS, and, in certain configurations, airbag/occupant safety systems. Accurate acceleration data allows control units to adjust braking, engine torque, and restraint deployment logic to maintain vehicle stability and occupant protection.
Symptoms Of A Faulty Sensor
- Warning lights on the dash such as ESP, ABS, or Airbag/Airbag System illumination.
- Intermittent or constant fault codes related to acceleration/IMU sensors (readable with an OBD2/diagnostic scanner).
- Unstable traction control or unexpected intervening of stability systems during normal driving.
- In rare cases, improper airbag system behavior indicators or diagnostic errors.
Installation Recommendations
Install the sensor with care to ensure correct orientation and secure mounting. Typical replacement steps used by professionals:
- Disconnect the negative battery terminal and wait a few minutes to remove residual power from electronic safety systems.
- Locate the sensor—on many Peugeot 307 variants it is mounted close to the vehicle center (commonly under the center console or attached to the body near the floor). Exact location depends on model and equipment level.
- Remove interior trim panels as required to access the sensor and unplug the electrical connector.
- Unscrew the sensor mounting bolts, replace the unit, and secure with the specified torque values from the workshop manual.
- Reconnect the electrical connector and reassemble trim panels. Reconnect the battery.
- Clear stored fault codes with a diagnostic tool and perform a road test to verify correct operation of stability and safety systems.
Note: Always follow the vehicle manufacturer’s workshop manual for precise removal/installation procedures, torque settings, and any calibration or relearn steps required by the vehicle’s control units.
Most Common Failure Reasons
- Water Ingress Or Corrosion: Moisture or corrosion on the connector or sensor housing can cause intermittent faults or complete failure.
- Electrical Damage: Short circuits, connector damage, or wiring harness faults can lead to sensor malfunction.
- Impact Or Mechanical Stress: Physical shock from collisions or improper handling during repairs can affect sensor calibration or cause internal damage.
- Aging Electronics: Over time the internal electronics or solder joints may deteriorate, leading to error codes or loss of signal.
Technical Information
- Manufacturer: Siemens
- Model: Peugeot 307
- Product Codes: 9649474680, 5WK42989, 8216AL
- Other Numbers: 9649474680 | 5WK42989 | 8216AL
This sensor is a direct-fit replacement referenced by the listed part numbers. Use the exact product code when searching or ordering to ensure fast identification. Suitable for workshops and competent DIY installers who perform diagnostics and calibrations after replacement.
