BMW E39 ABS ASC Module Bosch 0265109023 - Used Original Parts

Diagnosis and Common Symptoms

A failing Bosch 0265109023 ABS/ASC control module on the E39 chassis typically triggers the ABS, brake (!), and ASC/DSC warning lights simultaneously on the instrument cluster. Common fault codes logged include DME/DSC communication faults, hydraulic pump relay failure codes, and internal module electronic faults that cannot be cleared by bleeding the brakes. Drivers often report the ASC light staying permanently on, loss of traction control intervention, a pulsating brake pedal at low speed unrelated to actual ABS activation, or the pump motor running continuously (audible whine from the engine bay) even at a standstill. In more advanced failures, the ABS pump relay clicks repeatedly, the module draws down the battery overnight, or the vehicle enters a fail-safe mode with hard brake pedal feel and no power-assisted ABS modulation. These symptoms are almost always traced to worn internal relays, cracked solder joints, or corrosion inside the Bosch 5.3/5.7 hydraulic unit control board rather than the hydraulic block itself, making a tested replacement module the most direct and cost-effective fix.

Introduction

This is a Genuine Used BMW E39 ABS ASC control module, Bosch part number 0265109023, removed from a running donor vehicle and fully Tested for correct operation before listing. Rather than gambling on a rebuilt or aftermarket unit, this module retains the original factory calibration and connector integrity expected from a genuine BMW component. Every unit passes bench and continuity testing to confirm the module powers up, communicates, and drives the hydraulic pump correctly. Sourced and inspected by a technician familiar with E39 ABS/DSC systems, this is a reliable, budget-conscious solution for owners facing ABS or ASC warning lights.

Product Details

• Brand: Bosch
• Model Compatibility: BMW E39 5 Series
• Part Name: ABS ASC Control Module
• Part Number: 0265109023
• Condition: Genuine Used (Tested Working)
• Notes: Must match the exact Bosch part number on the vehicle's existing hydraulic unit and control module label; module and hydraulic pump block are typically paired as a matched set, so matching part numbers front and back is essential before purchase.