Dorman 888-5901 Headlight Bulb Cap

Dorman 888-5901 Headlight Bulb Cap

Dorman 888-5901 is a replacement headlight bulb cap for halogen headlamp assemblies. It restores the sealing point at the rear of the headlight housing to help keep dust and moisture out when the original cap is missing or damaged.

Built from black plastic with a twist-lock mounting method, this cap is sized for a 4.5-inch outside diameter and a 1.125-inch depth. It is a direct-fit style replacement for select headlight assemblies that use a non-threaded bulb cap.

Key Features

• Replacement headlight bulb cap for halogen headlamp assemblies
• Black plastic construction
• Twist-lock mounting method
• 4.5-inch outside diameter and 1.125-inch depth
• Designed to seal out dust and moisture
• Package includes 1 headlight bulb cap
• Part number 888-5901 for ordering and cross-reference

Detailed Description

This Dorman headlight bulb cap is made to match the fit and function of the original rear lamp cover used on compatible halogen headlight assemblies. By closing off the access opening behind the bulb, it helps maintain the integrity of the headlamp housing and supports proper protection of the internal components. If you are replacing a missing or cracked cap on a vehicle such as a Honda Civic or Toyota Camry, this OE-style cap provides a straightforward service replacement. The part number 888-5901 is also a useful reference when verifying the correct cap for your application.

This part cross-references OE number 85124797 for the same application.

What It Helps Fix

• Missing headlight bulb cap
• Damaged or cracked rear headlamp cover
• Dust intrusion into the headlight assembly
• Moisture entering the bulb access area
• Loose or poorly sealing halogen headlight cap

Installation Notes and Tips

Confirm the headlamp uses a halogen bulb cap with a twist-lock attachment before ordering. Match the outside diameter, depth, and mounting style to the original cap for proper sealing. Clean the housing edge before installation so the cap seats evenly and locks fully into place. For fitment-based searches, this replacement is commonly sought for headlight bulb cap replacement on Honda Civic and Toyota Camry applications, but final compatibility should be verified against the original part dimensions and design.

Quality Assurance

Dorman replacement parts are engineered to match the fit and function of the original component. This cap is made from quality materials to help restore the sealing function of the headlight assembly when the factory part is no longer serviceable.