921 Light Bulb Replacement Guide

Common bulb fittings

9005 H7 H11 H9 9006 H13 H1 9003 9012 194 9007 H8 9004 168 H8 LED 912 DE3175 H3 D1S H11B H11 LED Show more

What Drivers Should Know About 921 Bulbs?

W16W also known as the 921 lamp is a halogen light bulb typically used as a reverse light or backup light on many vehicles. The W16W designation comes from the bulb's width of 16 mm and its length of 29 mm.

These bulbs have a nominal power of 12 V: 16 W which means that the power drawn by the bulb is 16 watts. The nominal voltage is usually slightly higher than the rated voltage to allow for voltage losses in the circuit. With such parameters, the 921 light bulb is one of the most powerful in the category of backup or reverse lights. With only 1 filament this automotive light bulb has a long service life.

It has a color temperature of 6500K and a light output of 2000 lumens, it makes for a very bright white light. Thanks to the special gas filling, the 921 bulb has a much higher efficiency than incandescent bulbs.

The three main benefits of using a 921 light bulb are:

• Increased safety when driving
• Better visibility
• Longer service life

If you are looking for a powerful and bright light for your backup or reverse lights, then the 921 bulb is a good option. Thanks to its high efficiency and long service life, it is a popular choice among drivers.

What base is a 921 bulb?

The wedge base W2.1×9.5d is a type of base used on several types of light bulbs. The wedge base is named for its shape; it is essentially a triangular prism with two sloped sides and one flat side. The dimensions of the base are given in millimeters. The W2.1×9.5d designation means that the width of the base is 2.1 mm and the length is 9.5 mm.

The wedge base is one of the most common types of bases used on light bulbs, as it can be found on a variety of different bulb types, including incandescent, halogen, and LED bulbs.

What Is A 921 Bulb Used For?

This bulb is an excellent direct replacement for your car or truck's interior or exterior lighting. These bulbs have been built to endure a large amount of road shock and vibration, and have improved longevity. 

The 921 automotive light bulb would be perfect for your car's backup lights, turn signals, or parking lights. You can also use these bulbs in your truck's taillights, brake lights, or reverse lights. These bulbs are much brighter than standard incandescent bulbs and will give your vehicle a modern look.

What Bulb Is The Same As 921?

The 912 and 921 bulbs are interchangeable because they use the same T-5 wedge base. The 921 consumes 16.8 watts and draws 1.4 amps of electricity. The 912 has a wattage of 12 and draws 1 amp of current. As a result, the 921 should burn brighter than a regular 912 light bulb.

If you want to interchange the 921 bulb with another one, you can use the 912, 516, or 168. All these bulbs have the same T-5 wedge base and will fit in your car's light socket. The replacement process is simple and can be done in a matter of minutes. All you have to do is simply take a look at your car's manual to know which bulb size to buy.