Audi TT RS 2021 Bulb Size
Bulb size chart
This page covers bulb fitment for the 2021 Audi TT RS and is organized by lighting position so you can quickly verify the correct bulb type for each exterior and interior lamp. Because the TT RS uses a mix of LED lighting and a few small incandescent interior bulbs, checking the exact location matters before you order replacements.
Use this guide to match the bulb size to the specific light on your 2021 Audi TT RS, whether you are replacing a failed bulb or planning a maintenance refresh. The chart is laid out by position to make it easier to confirm items such as headlights, turn signals, license plate lights, dome lights, and cargo-area lighting.
Fitment can vary by market, trim, body style, and lighting package, so the same 2021 Audi TT RS may not use identical parts in every region. Many exterior lamps on this model are LED-based, while some interior locations use a 2825 bulb, which is why it is smart to confirm the installed bulb before buying. If your car has been converted with aftermarket LED components, the replacement may need to match the existing setup rather than the original factory bulb type. Always compare the bulb in the housing, the owner’s manual, and the vehicle’s build details before purchasing.
FAQ
What bulb sizes does the 2021 Audi TT RS use for the headlights?
The 2021 Audi TT RS page lists LED lighting for both the low beam and high beam headlight positions. Because the model uses LED headlight components, the exact replacement method may differ from a traditional halogen bulb swap.
Are the fog lights on the 2021 Audi TT RS LED?
Yes. The front fog light bulb position is listed as LED for the 2021 Audi TT RS.
What does this page help me verify?
It helps you verify bulb sizes by lighting position, so you can match the correct bulb to the exact lamp on the car instead of guessing by model name alone.
Does the 2021 Audi TT RS use LED turn signals?
Yes. Both the front turn signal light and rear turn signal light positions are listed as LED on this page.
What bulb type is used for the license plate lights?
The license plate light bulb position is listed as LED for the 2021 Audi TT RS.
Which interior bulbs on the 2021 Audi TT RS are not LED?
The glove box light, trunk or cargo area light, and interior door light are listed as 2825 bulbs. Other interior positions on the page, such as vanity mirror light, dome light, and map light, are listed as LED.
Can trim or package differences change the bulb fitment?
Yes. Trim and lighting package differences can affect fitment by market and body style, so it is important to confirm the exact configuration of your 2021 Audi TT RS before ordering bulbs.
If my TT RS has aftermarket LED conversions, should I still use the factory bulb listing?
Not always. Aftermarket conversions can change the bulb type already installed in the vehicle, so you should inspect the current bulb and the housing before buying a replacement.
Are the daytime running lights and parking lights LED on this model?
Yes. The daytime running light bulb and parking light bulb positions are both listed as LED for the 2021 Audi TT RS.
What should I check before replacing a bulb on my 2021 Audi TT RS?
Check the exact lighting position, confirm whether the car has factory LED equipment or an aftermarket conversion, and compare the installed bulb to the listing for your market and trim.
Does the rear lighting on the 2021 Audi TT RS use LED bulbs?
Yes. The tail light bulb, brake light bulb, center high mount stop light bulb, and rear side marker light bulb positions are all listed as LED.
Why are some bulbs shown as LED and others as 2825?
That reflects the factory lighting setup for this model year. The 2021 Audi TT RS uses LED assemblies in many exterior and cabin locations, but certain smaller interior lamps are still listed with a 2825 bulb.