Phillips H4703C1 Headlight Bulb - Low Beam

Phillips H4703C1 Low Beam Headlight Bulb

The Phillips H4703C1 is a standard halogen low beam headlight bulb built for clear, road-legal exterior lighting. It is DOT approved and street legal, making it a direct choice for drivers replacing a worn sealed beam low beam on select Pontiac, Chevrolet, GMC, Jeep, Buick, Chrysler, Geo, Oldsmobile, and Isuzu applications.

Key Features

• Halogen bulb technology with clear bulb color and clear finish
• Low beam headlight bulb for exterior lighting replacement
• DOT approved and street legal
• Standard sealed beam design with C-8 filament type
• Glass bulb construction with 2 contact lugs base type
• 14-volt, 55-watt specification
• Phillips Standard - Single Commercial Pack product line

Product Details

Phillips positions the Standard range as a value-focused lighting solution for everyday use, and the H4703C1 follows that approach with a straightforward halogen design. The bulb is engineered for low beam service and uses a standard sealed beam format, which is important for vehicles that require this style of headlamp assembly. This part number, H4703C1, is listed for a wide range of older vehicles including the Pontiac Firebird, Chevrolet G30, and GMC G3500, along with other sealed beam and four-headlight applications.

This part cross-references Davico Mfg 18538 for the same application.

What It Helps Fix

• Dim or aging low beam output
• Burned-out sealed beam headlight replacement needs
• Reduced nighttime visibility from worn halogen lighting
• Failed DOT-compliant exterior lighting inspections
• Restoring proper low beam function on older GM, Pontiac, Jeep, and Chrysler vehicles

Installation Notes

Verify the vehicle uses a low beam standard sealed beam headlamp and confirm the headlight configuration before ordering. Fitment includes vehicles equipped with four headlights and models with sealed beam headlamps, so matching the original lamp style is essential. Confirm the bulb base, voltage, and beam type against the existing unit before installation. Fits 1998-2002 Pontiac Firebird, low beam. Fits 1992-1996 Chevrolet G30, low beam. Fits 1988-1991 Chevrolet C1500, low beam. Fits 1985-1990 Jeep Wagoneer, low beam.

Quality Assurance

Phillips Standard lighting is built around practical replacement value and consistent exterior lighting performance. The H4703C1 is DOT approved and street legal for use in the listed applications.