LED Headlight Control Module Audi A4 A5 Q7 - 4M0907397AB

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.