Used for: Back Up Light Bulb
Used for: Parking Light Bulb, Side Marker Light Bulb Front, Side Marker Light Bulb Rear
Used for: Turn Signal Light Bulb Rear
Used for: Dome Light Bulb
Used for: Interior Door Light Bulb, Map Light Bulb, Trunk or Cargo Area Light, Vanity Mirror Light Bulb
The 2021 Toyota Prius uses a mix of LED and traditional bulb types, and this page is designed to help you verify the correct bulb size by lighting position. Whether you are replacing an exterior lamp or a cabin bulb, matching the bulb to the right location is the easiest way to avoid ordering the wrong part.
For this model year, many key exterior lights are listed as LED, while several interior and auxiliary locations still use replaceable bulb sizes. Use the chart to confirm the fit for the headlight, fog light, tail light, brake light, turn signal, license plate light, and interior lighting positions on your 2021 Toyota Prius.
Fitment can vary by trim, lighting package, market, and body style, so it is smart to compare the chart with the bulb already installed in your Prius before buying. Some positions may be factory LED assemblies, while others may use serviceable bulbs or different connectors depending on whether the car has halogen-style replacement parts or LED modules. If you are considering an aftermarket LED conversion, make sure the bulb base, polarity, and space inside the housing are compatible, since not every replacement LED will fit or function correctly. Checking the installed bulb first is the safest way to confirm the exact match and avoid returns.
The back up light bulb listed for the 2021 Toyota Prius is 921.
The chart lists the headlight high beam and low beam as LED on this page, which usually means the light is part of an LED setup rather than a simple halogen bulb replacement.
The front fog light bulb is listed as LED.
The license plate light bulb is listed as LED.
The dome light bulb is listed as DE3175.
The map light bulb is listed as 168.
The vanity mirror light bulb is listed as 168.
The trunk or cargo area light bulb is listed as 168.
The interior door light bulb is listed as 168.
The parking light bulb is listed as 2825.
The front side marker light bulb is listed as 2825.
The rear side marker light bulb is listed as 2825.
The rear turn signal light bulb is listed as 7440.
Yes, the chart lists both the brake light and daytime running light as LED.
Because trim and lighting package differences can change the exact fitment, and checking the installed bulb helps confirm the correct size, base, and style before you buy.
