The BOSCH inertial control unit (kinetic ESP sensor) is a critical safety component for Citroën and Peugeot vehicles equipped with electronic stability control. The sensor measures vehicle accelerations and rotational movements to support ABS/ESP systems, improving vehicle stability during emergency maneuvers, cornering and traction loss. This part is commonly searched by its product numbers, so check the listed codes when matching replacement units.

Technical Information

• Manufacturer: Bosch
• Compatible Models: Citroën C4, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807
• Product Codes: 0265005714, 9663187680
• Additional Numbers: 9811627180, 454939, 0265005291, 265005714, 9649400180

Function And Symptoms

The inertial sensor provides the ESP/ABS control unit with yaw rate and acceleration data. When the sensor fails or reports incorrect values, the vehicle can display ESP/ABS warning lights, reduced stability control functionality, unexpected ABS activation, or a change in handling (pulling or instability during cornering). Fault codes related to the sensor may appear in the ABS/ESP unit memory.

How To Replace

1. Park on a level surface, engage the parking brake and disconnect the negative battery terminal before any work.
2. Access the sensor location (typically mounted centrally under the dash or on the body tunnel; location varies by model). Remove interior trim panels as required to reach the unit.
3. Unplug the electrical connector and remove mounting fasteners. Handle the sensor carefully to avoid shocks or contamination.
4. Install the replacement unit in the correct orientation, secure fasteners to the manufacturer’s specification, reconnect the electrical connector and reassemble trim.
5. After installation, the ESP/ABS system requires initialization or calibration using an appropriate diagnostic tool to ensure correct sensor alignment and operation.

Installation Recommendations

• Always disconnect the battery before removal and follow the vehicle manufacturer’s disassembly procedure to avoid damage to connectors or control electronics.
• Use proper tools and avoid excessive force on connectors and PCB housings. Keep the sensor dry and free from contaminants during installation.
• After fitting, perform an electronic calibration/initialization of the ESP/ABS system with PSA service equipment (DiagBox) or an equivalent diagnostic tool capable of initializing ESP sensors.
• If unsure about calibration procedures, have the initialization performed by a qualified technician with PSA diagnostic equipment.

Most Common Failure Causes

• Mechanical shock or impact (accident damage) that disturbs sensor alignment or internal components.
• Water ingress or corrosion at connectors causing intermittent signals or open circuits.
• Electrical faults such as short circuits, voltage spikes or poor grounding affecting sensor electronics.
• Age-related deterioration of internal components or connector contacts.

Why Choose This Unit

Selecting the correct part number is essential for reliable ESP function. This inertial sensor corresponds to common BOSCH and OEM references used on several Citroën and Peugeot models. It is suitable for professional workshops and experienced DIY mechanics who can perform careful removal, secure installation and post-fit calibration.

High-quality Bosch kinetic ESP sensor designed as a direct-fit replacement for specific Citroën and Peugeot models. This sensor feeds the vehicle stability control (ESP/ABS) system with precise motion data so the control unit can detect and correct understeer, oversteer and other dynamic instabilities. Frequently searched by part number (for example 9649400180, 0265005291), the unit is suitable for professional workshops and experienced DIY mechanics who need a reliable, vehicle-specific component to restore correct ESP operation.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4, Citroën C8 II, Peugeot 307 II, Peugeot 807 II
• Product Codes: 9649400180, 0265005291, 9811627180
• Additional Numbers: 454939, 454926, 0265005714, 265005291, 9663187680

Function

The kinetic ESP sensor measures vehicle motion parameters (longitudinal/lateral acceleration and dynamic movement used by the ESP/ABS systems). The ESC/ESP control unit uses these signals to compare actual vehicle behaviour with driver input and to command selective braking or torque reduction to maintain stability. Accurate sensor readings are essential for predictable electronic stability control performance.

Common Symptoms of Failure

• ESP/ABS warning lamps illuminated on the dashboard.
• Intermittent or permanent loss of traction/stability control interventions.
• Unexpected ABS or ESP activation during normal driving, especially in corners.
• Diagnostic fault codes related to sensor signal or communication errors.

Why This Part Fails Most Often

Typical causes of kinetic sensor failure include moisture ingress and connector corrosion, physical damage from impacts or road debris, wiring harness fatigue or chafing, and long-term exposure to vibration and heat. Electrical faults such as intermittent connectors or internal sensor electronics degradation are also common on higher-mileage vehicles.

Replacement Guide

Intended for mechanics and competent DIYers. Typical replacement steps:

• Safety first: Disconnect the negative battery terminal before starting work to avoid electrical damage or faults.
• Locate the sensor—on Citroën/Peugeot models it is commonly mounted near the ABS/ESP unit or under the dash/center console; consult the vehicle repair manual for exact location.
• Remove any trim or covers to access the sensor, unplug the electrical connector, and unbolt the sensor from its bracket.
• Install the new sensor, secure fasteners to the manufacturer’s recommended tightness, reconnect the wiring and reassemble trim.
• After replacement clear fault codes with a diagnostic tool and perform any required calibration or adaptation of the ESP/ABS system (see next section).
• Perform a road test in safe conditions to verify normal ESP/ABS behavior.

Installation Recommendations

• Use contact cleaner on electrical connectors if corroded and ensure secure, dry connections.
• Inspect the wiring harness and repair any damaged insulation or broken wires before installing the new sensor.
• Do not reuse a damaged sensor mounting bracket; ensure the sensor is mounted solidly to avoid vibration-related faults.
• Clear all related fault codes after installation and follow the vehicle manufacturer’s calibration/adaptation procedure for the ESP/ABS system using a suitable diagnostic tool.

Calibration And Diagnostics

Replacement often requires a diagnostic tool to clear related fault codes and, in many cases, to perform sensor calibration or adaptation so the ESP system accurately interprets the new sensor’s signals. If the vehicle reports persistent errors after replacement, check connector continuity, supply voltages and any related sensors (steering angle sensor, wheel speed sensors) that can influence ESP behaviour.

Compatibility And Part Number Search

This sensor is commonly listed under multiple OEM and supplier numbers—customers often search by the part number to confirm fitment. Main references include 9649400180 and 0265005291; additional cross-reference numbers are provided in the Technical Information above. Fitment applies to specified Citroën C4, Citroën C8 II, Peugeot 307 II and Peugeot 807 II applications.