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.