Description
Overview
This Bosch ESP control unit (electronic stability program) is designed for Peugeot 406 vehicles and manages the vehicle’s ABS & ESP functions. It is an OEM-style electronic module commonly searched for by its part numbers 0265109089 and 9642933480. The unit monitors wheel speed sensors and controls hydraulic modulation to maintain stability and traction under braking and cornering.
Function And Benefits
The control unit interprets sensor inputs (wheel speed, yaw, steering angle) and modulates the ABS/ESP hydraulic unit to prevent wheel lock-up and loss of control. Replacing a faulty module restores correct braking intervention, improves vehicle safety, and clears related warning lights. For professional mechanics and experienced DIYers, installing the correct module is essential for safe operation.
Compatibility And Fit
Intended for Peugeot 406 models that use Bosch ABS/ESP modules. Confirm fitment by matching the part numbers 0265109089 or 9642933480 with your vehicle’s existing unit. Vehicle model years commonly associated with Peugeot 406 range from mid-1990s to early 2000s; always verify exact compatibility before purchase.
Replacement And Installation
Typical replacement steps:
- Disconnect the negative battery terminal before starting.
- Locate the ABS/ESP module (usually in the engine bay near the brake master cylinder or inner wing).
- Unplug electrical connectors and remove mounting bolts securing the module.
- Install the new unit, secure bolts, and reconnect electrical connectors.
- After mechanical installation, a diagnostic tool is usually required to clear fault codes, perform module coding/pairing (if applicable), and initialise the system.
- Bleed the brake system to remove air introduced during work, following manufacturer procedures.
Note: Many modern vehicles require module coding or adaptation with a professional diagnostic tool to ensure full functionality. If unsure, consult a qualified technician.
Common Failure Modes
Failures can occur due to internal electronic faults, moisture ingress or corrosion, damaged connectors/wiring, or hydraulic pump/motor issues. Symptoms include ABS/ESP warning lights, loss of ABS function, unusual braking behavior, or intermittent faults. High mileage and harsh environmental conditions increase risk of failure.
Technical Information
- Manufacturer: Bosch
- Model: Peugeot 406
- Product Codes: 0265109089, 9642933480
- Other Numbers: 4542A4 NFP
If you are a professional mechanic or a competent DIYer, this Bosch ESP unit is a direct-replacement option when the part numbers match. Always confirm compatibility and be prepared to perform diagnostic coding and brake bleeding as part of the installation process.
