Used for: Back Up Reverse Light Bulb
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb
Used for: Turn Signal Light Bulb Rear
The 2021 Ford Bronco brought back an iconic name with a wide range of trim and lighting setups, so bulb fitment can vary depending on body style, market, and equipment. This page is designed to help you verify the correct bulb size by lighting position before you buy replacements.
Use the bulb chart for the 2021 Ford Bronco to match the right bulb to the right lamp, whether you are replacing a rear turn signal, brake light, or back up reverse light. Checking by location is the safest way to avoid ordering the wrong bulb when trims or lighting packages differ.
For the best fit, compare the bulb listed on this page with the bulb already installed in your Bronco, especially if your vehicle has factory LED lighting, a halogen setup, or an aftermarket conversion. Trim and package differences can change the bulb type used in the rear lamps, and some markets may use different specifications as well. If your Bronco has been modified with LED bulbs, adapters, or custom housings, the original bulb chart may not match what is currently in the vehicle. Before purchasing, remove the old bulb and confirm the base style and size so you can avoid returns and get the correct replacement the first time.
The listed back up reverse light bulb sizes for the 2021 Ford Bronco are 7440 and WT21W, depending on the trim, market, or lighting package.
The brake light bulb listed for the 2021 Ford Bronco is 3157.
The rear turn signal light bulb listed for the 2021 Ford Bronco is 1157.
Fitment can vary because trim level, body style, and lighting equipment are not always the same across all 2021 Ford Bronco models and markets.
Match the bulb by lighting position and confirm the bulb currently installed in the vehicle before ordering a replacement.
Yes, some 2021 Ford Bronco trims or lighting packages may use LED lighting, which can change what bulb is needed or whether a bulb is serviceable at all.
Use the chart as a starting point, but check the installed bulb and the modified housing or adapter because aftermarket conversions can change the required fitment.
Not always. The page lists 7440 and WT21W for the back up reverse light, but the correct one can depend on the exact vehicle configuration.
Yes, you can usually replace a single failed bulb, but many owners choose to replace both sides at the same time for even brightness and color.
Confirm that the bulb is actually the 3157 type listed for the vehicle and inspect the socket and housing for corrosion or damage while the bulb is out.
It helps with the rear lighting positions listed on the chart, including back up reverse light, brake light, and rear turn signal bulb fitment.
Different lights on the same vehicle can use different bulb types, so checking by position helps prevent ordering the wrong part for the wrong lamp.
