Dorman 42427 Headlight Bulb Cap

Headlight Bulb Cap for OE-Style Sealing

Dorman 42427 is a replacement headlight bulb cap built to match the fit and function of the original part. It helps restore the headlamp housing seal by keeping dust and moisture out of the assembly, which is important when the factory cap is missing, cracked, or no longer sealing properly.

Compatible with select Hyundai Elantra, Sonata, and Santa Fe applications, as well as Kia Sedona high beam headlamp setups, this Dorman 42427 cap is made from plastic and rubber with a black finish for a direct replacement look and fit.

Key Features

• OE-style replacement headlight bulb cap for high beam headlamp assemblies
• Made from plastic and rubber for sealing performance
• Black finish for a clean factory-style appearance
• Twist-on mounting method for straightforward installation
• Includes retaining ring and weather seal
• Non-threaded design
• Outside diameter: 2.64 in.; depth: 1 in.

Detailed Description

This replacement cap is engineered to restore the integrity of the headlight assembly when the original cover is damaged or missing. By sealing the rear of the lamp housing, Dorman 42427 helps protect the bulb area from road dust and moisture intrusion. It is a direct-fit solution for high beam applications on 2008-2011 Hyundai Elantra, 2004 Hyundai Elantra, 2009-2010 Hyundai Sonata, 2007-2008 Hyundai Santa Fe, and 2004-2005 Kia Sedona.

This part cross-references OE numbers 0K52Y51030A and 921010A500 for the same application. Dorman 42427 is a practical replacement when you need a headlight bulb cap that matches the original mounting style and sealing function.

Common Problems This Part Can Help Solve

• Missing headlight bulb cap after prior service or repair
• Cracked or brittle factory cap that no longer seals
• Dust buildup inside the headlamp housing
• Moisture intrusion around the high beam bulb area
• Loss of proper rear headlamp cover retention

Installation Notes and Tips

Verify the headlamp opening and mounting style before installation. This cap uses a twist-on mounting method and is not threaded. Confirm high beam application and compare the original cap dimensions to the listed outside diameter and depth for proper fitment on your Hyundai Elantra, Sonata, Santa Fe, or Kia Sedona.

Quality Assurance

Dorman manufactures replacement hardware and service parts to match original fit and function. This cap is built from quality materials to help maintain a sealed headlight assembly and restore the protective barrier at the rear of the lamp housing.