O-NEX Xenon D3S/D4S 35W HID Ballast 8K0941597E – OEM Replacement for Audi VW

Introducing the O-NEX Xenon D3S/D4S 35W HID ballast—a factory-style control module designed to replace aging headlamp ballast on a broad range of Audi and VW vehicles. This unit emphasizes a direct, plug-and-play fit that mirrors the original form factor for a clean installation.

The module is described as an OEM-design, factory direct replacement. Note that the replacement ballast is not OEM-branded, but it is engineered to integrate with your factory wiring and mounting points, delivering a seamless appearance and reliable power delivery for your HID system.

Compatibility and part references

Designed for multiple models, including Audi A1, A3, A4, A5, A6, A7, A8, Q3, Q5, SQ5, Q7; VW CC, Eos, Golf GTI, Jetta, Touareg, Passat; Seat Alhambra; Skoda Oktavia Superb. OEM numbers include 8K0 941 597, 8K0941597E, 8K0-941-597-E, W003T22071. Before ordering, please verify that your factory ballast and connectors match these references and the image.

Important notes: mid-cycle refreshes or new production dates can change ballast type, so double-check the exact unit on your car. A frequent root cause of ballast failure is water in the headlight; if water is present and the ballast failed because of it, you may need to replace the headlight to prevent future issues.

Real-world use and benefits

• Plug-and-play installation reduces time and complexity for DIY enthusiasts.
• OEM-style compatibility helps keep headlight performance consistent and predictable.
• Compact design integrates with stock mounting points for a clean factory look.

This replacement ballast offers a practical, cost-conscious option for maintaining HID functionality without committing to a full headlight assembly upgrade, while allowing you to retain the original vehicle aesthetics and illumination characteristics.

What’s in the package

• 1 x HID ballast control module (replacement unit)