Audi TT RS 2018 Bulb Size
Bulb size chart
This page covers the 2018 Audi TT RS and helps you verify the correct bulb size by lighting position. Instead of guessing by appearance alone, you can match each exterior and interior light location to the bulb type listed for this model year.
The 2018 TT RS uses LED lighting for many exterior functions, including the headlights, daytime running lights, turn signals, brake lights, and license plate lights. A few interior and cargo-area positions still use 2825-style bulbs, so checking each location before ordering can save time and prevent fitment mistakes.
Fitment can vary by trim, lighting package, market, and body style, so always compare the bulb in your car with the listing before buying. Some 2018 Audi TT RS models use factory LED assemblies, while others may have different service parts depending on region or equipment level. If your car has been modified with aftermarket LED conversions, the bulb size shown on the page may not match what was originally installed. For the most reliable result, remove the existing bulb and confirm the base type, connector style, and physical shape before purchase, especially for interior 2825 bulbs and any exterior light that may have been changed previously.
FAQ
Does the 2018 Audi TT RS use LED bulbs for most exterior lights?
Yes. On this page, most exterior lighting positions for the 2018 Audi TT RS are listed as LED, including the headlights, fog light, DRL, brake light, tail light, turn signals, and license plate lights.
How do I use this page to find the correct bulb size?
Look up the lighting position first, such as low beam, high beam, or rear turn signal. Then match that position to the bulb type shown for the 2018 Audi TT RS on this page.
Are the low beam and high beam bulbs the same on the 2018 TT RS?
No. The page lists both headlight low beam and headlight high beam as LED, but they are separate lighting positions and should be checked individually before replacement.
Which interior bulbs on the 2018 Audi TT RS are not LED?
The glove box light, trunk or cargo area light, and interior door light are listed as 2825 bulbs. The dome light, map light, and vanity mirror light are listed as LED.
Can trim or market differences change the bulb fitment?
Yes. Trim level, lighting package, body style, and market can all affect the exact fitment on a 2018 Audi TT RS, so it is important to verify the bulb in your specific vehicle.
What should I check before replacing a bulb on this car?
Check the installed bulb type, the connector or base style, and whether the light is a replaceable bulb or a sealed LED assembly. This is especially important on exterior lighting for the TT RS.
Are aftermarket LED conversions a concern on the 2018 Audi TT RS?
They can be. If a previous owner installed aftermarket LED bulbs or conversion kits, the current bulb may not match the original factory specification, so inspect the part already in the car before ordering.
Do the front and rear turn signals use the same bulb type?
Both front and rear turn signal positions are listed on this page as LED for the 2018 Audi TT RS, but they are separate locations and should still be matched by position.
Is the back up reverse light on the 2018 TT RS an LED bulb?
Yes. The back up reverse light bulb is listed as LED for this model year on this page.
What bulb is used for the glove box light?
The glove box light is listed as a 2825 bulb for the 2018 Audi TT RS.
What bulb is used for the trunk or cargo area light?
The trunk or cargo area light is listed as a 2825 bulb for the 2018 Audi TT RS.
Why is it important to verify the exact lighting position?
Because the 2018 Audi TT RS uses different bulb types depending on the location. Matching the exact position helps avoid ordering the wrong part, especially when several lights are LED and a few interior lights use 2825 bulbs.