Dorman 601-052 High Intensity Discharge (HID) Lighting Ballast

Dorman 601-052 HID Ballast for OE-Style Headlight Repair

Dorman 601-052 is a high-intensity discharge lighting ballast built to match the fit and performance of the original unit on specified vehicles. It restores proper headlight operation when the factory HID ballast fails, helping bring back consistent lighting on Audi, BMW, Jaguar, Mercedes-Benz, Rolls-Royce, Saab, and Chrysler applications.

Key Features

• OE-style replacement for the original HID lighting ballast
• Complete control module replacement type for exterior lighting repair
• Aluminum body with silver finish for durable under-hood use
• Blade terminal design with one connector and six terminals
• Direct-fit solution for many D1S HID headlight applications
• Part number 601-052 for easy identification and ordering

Detailed Description

This Dorman HID ballast is engineered to restore headlight function on vehicles equipped with factory high-intensity discharge lighting. It is listed for a wide range of fitments, including 2005-2008 Audi A6 Quattro, 2006-2008 BMW Z4, 2002-2006 BMW X5, 2007-2011 Mercedes-Benz CLS550, and 2004-2012 Rolls-Royce Phantom. The 601-052 also cross-references TechSmart R66001 for the same application.

Built with an aluminum housing and compact dimensions, this ballast is designed to replace the failed original component without changing the vehicle’s lighting system layout. The Dorman 601-052 is a practical choice for restoring HID headlight output on vehicles such as the Mercedes-Benz E-Class, ML-Class, SLK-Class, and Audi A8 Quattro when the factory ballast is no longer functioning correctly.

What It Helps Solve

• Headlight not turning on after HID ballast failure
• Intermittent or unstable HID headlight operation
• One headlight working while the other remains dark
• Loss of proper low-beam output on HID-equipped vehicles
• Faulty original ballast causing exterior lighting warning symptoms

Installation Notes and Tips

Verify the original part number, connector style, and bulb type before installation. This unit uses a blade terminal layout with one connector and no wiring harness included. Fitment varies by vehicle and lighting package, including applications with D1S bulbs and models noted without adaptive lighting. Confirm the vehicle’s HID configuration before replacing the ballast.

Quality Assurance

Dorman manufactures this replacement to match the fit and performance of the original HID ballast for specified applications. The part is built as a direct replacement control module for restoring factory headlight function.