LED Headlight Control Module Audi A4 A5 Q7 – 4M090

Description The 4M0907397AB LED Headlight Control Module is an OEM electronic unit designed to control and regulate LED headlight and daytime running light (DRL) functions on various Audi models. This module is mounted on the headlight assembly and is responsible for managing LED operation, ensuring correct brightness, stability, and communication with the vehicle’s lighting system. It is a direct replacement for the original factory module, restoring proper headlight and DRL functionality when the original unit fails. Key Features OEM Part Number: 4M0907397AB Type: LED Headlight Control Module / DRL Driver / Ballast Direct Replacement Unit – Matches factory specifications Controls LED Functions – DRL, low beam, and related lighting systems Stable Power Regulation – Protects LED components from voltage fluctuations Plug & Play Physical Fitment (coding may be required) Durable Construction – Designed for automotive heat and vibration Cost-Effective Repair – Avoids replacing complete headlight assembly Part Number Details ✔ OEM Audi Part Numbers 4M0907397AB 4M0 907 397 AB ✔ Manufacturer / Supplier Numbers 011552-21AB-01 ✔ Interchange / Compatible Part Numbers* 4M0907397A 4M0907397B 4M0907397C 4M0907397D 4M0907397AA 4M0907397AC 4M0907397AD ⚠️ Important: Not all suffix variants are fully interchangeable. Always match your original part number or confirm with VIN before purchase. Vehicle Compatibility Audi A4 / S4 / RS4 (B9 – 8W) 2015, 2016, 2017, 2018, 2019, 2020 Audi A5 / S5 (FY) 2018, 2019, 2020 Audi Q7 / SQ7 (4M) 2015, 2016, 2017, 2018, 2019, 2020 ⚠️ Fitment Notes: Only compatible with vehicles equipped with LED headlights Not suitable for halogen or certain Xenon configurations Always verify against existing module before purchase Function & Application This module plays a critical role in the vehicle’s lighting system by: Controlling LED daytime running lights (DRL) Managing headlight LED performance (brightness & stability) Regulating voltage and current to prevent LED damage Communicating with the vehicle’s onboard electronics Common Fault Symptoms A failing module may result in: DRL not working or dim Flickering LED headlights One headlight not functioning Dashboard warning messages (lighting system faults) Replacing the module restores proper operation and prevents further electrical issues.