Phillips T4WLLB2 Dome Light Bulb - Front or Rear

Phillips LongerLife Dome Light Bulb for Interior Lighting

The Phillips LongerLife T4WLLB2 is a 12-volt incandescent dome light bulb built for interior lighting applications where dependable output and value matter. With a clear glass bulb, BA9s base, and compact mini-bulb design, it is a direct-style replacement for a wide range of classic and modern vehicles.

Phillips LongerLife bulbs are positioned for drivers who want strong everyday value from an interior lighting replacement. This part number, T4WLLB2, is used across many front, rear, and N/A-position applications in vehicles such as Mercedes-Benz G-Class models, Porsche 911, and Ferrari 488 applications.

Key Features

• 12V incandescent dome light bulb for interior lighting use
• Clear glass bulb with clear finish for consistent light output
• BA9s bulb base for supported fitment applications
• 4-watt, 0.33-amp electrical rating
• Single-filament C-2V design
• LongerLife mini bulb construction for value-focused replacement needs
• Interchanges with part number 78206

Product Details

The Phillips LongerLife line focuses on practical replacement lighting for drivers who want a dependable interior bulb without unnecessary complexity. The T4WLLB2 uses a glass bulb body, 0.85-inch length, and 0.35-inch diameter, making it suitable for compact dome light and interior lamp housings that call for a BA9s base and 4W incandescent specification. Compatible vehicle coverage includes applications such as Fits 1999-2018 Mercedes-Benz G500, Front; Fits 1981-1998 Porsche 911, Front; and Fits 2016-2019 Ferrari 488 GTB, Front.

This part cross-references 78206 for the same application.

Common Issues This Bulb Can Address

• Dim or failed dome light output
• Interior lamp bulb burnout
• Uneven cabin lighting from an aging incandescent bulb
• Replacement needs for BA9s-base interior fixtures
• Restoring illumination in front, rear, or N/A-position interior lighting locations

Installation Notes and Tips

Confirm the bulb base type, voltage, wattage, and physical dimensions before installation. Match the original interior lamp specification for proper fitment, especially on vehicles with compact dome light housings. Handle the glass bulb carefully during installation and verify the lamp functions correctly after replacement. Fitment examples include Fits 2009-2018 Mercedes-Benz G550, Front; Fits 1995-2005 Land Rover Range Rover, N/A; and Fits 1980-1989 Jaguar XJS, Rear.

Quality Assurance

Phillips LongerLife bulbs are engineered as value-oriented replacement lighting for drivers seeking a practical interior bulb solution. The T4WLLB2 is a 12V incandescent dome light bulb with defined electrical and dimensional specifications for fitment-based replacement selection.