Sylvania WT21WLL.TP Back Up Light Bulb

Sylvania Long Life Back Up Light Bulb

The SYLVANIA Long Life miniature bulb is a direct replacement for exterior auxiliary lighting and interior lamp applications. It is built for standard performance, durability, and lower maintenance in vehicles that use incandescent bulbs.

Compatible With Ford Bronco, Ford F-250 Super Duty, Ford F-150, and Ford F-350 Super Duty applications that call for this bulb type, including reverse and tail light use where specified by the vehicle.

Key Features

• Direct replacement miniature bulb for auxiliary lighting circuits
• Suitable for back up/reverse lights, trunk lights, dome lights, and similar locations
• Designed for durability and reduced maintenance
• Supports clear, dependable exterior and interior illumination
• SYLVANIA Long Life line for standard-performance replacement needs

Detailed Description

SYLVANIA Long Life WT21WLL.TP is a replacement lighting solution for drivers who need a straightforward bulb match for incandescent-equipped vehicles. This part number is used in Ford Bronco, Ford F-250 Super Duty, Ford F-150, and Ford F-350 Super Duty applications listed below, including models with incandescent bulb or incandescent tail light configurations. The WT21WLL.TP designation is also useful when searching for a direct OE-style replacement by part number.

This part cross-references Sylvania WT21WLL.TP for the same application.

What It Helps Solve

• Dim or failed reverse light output
• Burned-out trunk or dome lamp bulbs
• Intermittent auxiliary lighting caused by bulb wear
• Need for a direct replacement bulb in incandescent lighting systems
• Routine maintenance on exterior and interior lamp circuits

Installation Notes and Tips

• Verify the vehicle uses incandescent lighting before ordering.
• Match the existing bulb type and part number WT21WLL.TP before installation.
• Handle the bulb carefully during installation to avoid damage.
• Confirm proper operation after replacement in the selected lamp housing.

Quality Assurance

SYLVANIA Long Life bulbs are positioned as durable replacement lamps for standard automotive lighting service. They are engineered for dependable performance in everyday use and for reducing repeat bulb service in the specified applications.

• Fits 2022-2025 Ford Bronco, with Incandescent Bulb; SYLVANIA Long Life 10 Pack
• Fits 2023-2024 Ford F-250 Super Duty, SYLVANIA Long Life 10 Pack
• Fits 2021 Ford F-250 Super Duty, SYLVANIA Long Life 10 Pack
• Fits 2021-2023 Ford F-150, with Incandescent Tail Lights; SYLVANIA Long Life 10 Pack
• Fits 2023 Ford F-350 Super Duty, with Incandescent Tail Lights; SYLVANIA Long Life 10 Pack
• Fits 2022 Ford F-250 Super Duty, with Incandescent Tail Lights; SYLVANIA Long Life 10 Pack
• Fits 2021 Ford F-350 Super Duty, SYLVANIA Long Life 10 Pack