Dorman 601-166 High Intensity Discharge (HID) Headlight Igniter - Left or Right

Dorman HID Headlight Igniter 601-166

Dorman 601-166 is a high-intensity discharge (HID) headlight igniter built to match the fit and function of the original ignitor on specified vehicles. It is engineered for reliable performance and durability in exterior lighting systems, with a compact metal-and-plastic housing and 4-pin male terminal design.

Key Features

• Direct replacement HID headlight igniter for specified applications
• Matches original fit and function for factory-style restoration
• Metal and plastic construction with silver finish
• 4-pin male terminal connection for secure electrical interface
• Compact size: 2 in. long, 1.75 in. wide, 2 in. high
• Fits left or right headlight positions on listed vehicles

Detailed Description

This Dorman HID headlight igniter, part number 601-166, is designed for drivers replacing a failed factory ignitor in HID exterior lighting systems. It supports OE-style operation on applications such as Chevrolet Tahoe, GMC Yukon, Chevrolet Silverado 1500, Subaru Forester, Nissan 350Z, Acura MDX, and other listed vehicles. For shoppers searching for a Dorman 601-166 HID headlight igniter or a replacement igniter for Chevrolet Tahoe and GMC Yukon HID headlights, this part provides a direct-fit solution for the specified left and right headlamp positions.

This part cross-references 33129STXA01 and 84965FE020 for the same application.

What It Helps Fix

• No HID headlight start-up or intermittent ignition
• One headlamp not firing on startup
• Dim or unstable HID lighting output caused by igniter failure
• Factory lighting faults related to the headlight ignitor
• Restoration of proper HID lamp operation after electrical component wear

Installation Notes and Tips

Verify the vehicle’s original part number, connector style, and headlamp position before installation. This Dorman 601-166 uses a 4-terminal male pin connection and is listed for left and right positions on the supported applications. Confirm access around the headlamp assembly and follow the vehicle service procedure for HID lighting components.

Quality Assurance

Dorman states that this HID headlight igniter is engineered for reliable performance and durability, with fit and function matched to the original ignitor on specified applications.