Headlight HID Ballast Control Unit Module 4 PIN 3D0907391B For Audi A4 Volvo

Headlight HID Ballast Control Unit Module for Audi and for Volvo

This headlight HID ballast control unit module regulates the voltage and current needed to ignite and power HID xenon headlights, replacing OEM part number 3D0907391B.

Overview

The headlight HID ballast control unit module for Audi and for Volvo passenger vehicles ensures stable electrical distribution to high-intensity discharge bulbs. This durable module features a standard 4-pin connection for straightforward installation, resolving issues like flickering or failing headlights. Vehicle owners can rely on this headlight HID ballast control unit module to restore clear night visibility and safe driving conditions.

Built For Performance

• Equipped with a 4-pin interface for original vehicle wiring compatibility
• Designed to quickly ignite xenon bulbs with a high-voltage pulse
• Constructed with a heavy-duty aluminum shell for superior heat dissipation
• Internal circuitry is sealed to protect against moisture and vibration damage

Fits These Machines

• for Audi A4
• for Volvo models

On-The-Job Use

• Replacing failed factory ballasts causing dim or non-functioning headlights
• Restoring stable voltage output to eliminate xenon bulb flickering
• Ensuring proper headlight performance during dark or inclement weather conditions

Specs At A Glance

Good To Know

Q: How do I know if my ballast or bulb is bad? A: Swap the bulb to the working side of the vehicle; if it lights up, the ballast on the non-working side likely needs replacement.

Q: Is this module plug-and-play? A: Yes, this control unit is designed to install directly into the factory mounting position without modification.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.