Audi TT 2021 Bulb Size

This page includes LED lighting positions for the headlight high beam and low beam, fog light, brake light, turn signals front and rear, license plate light, parking light, tail light, daytime running light, side markers, cornering light, reverse light, and several interior lamps. It also lists 2825 bulbs for the glove box, trunk or cargo area, and interior door light.

The page lists both the headlight low beam and high beam as LED. On many TT configurations, these are part of LED lighting units rather than simple halogen bulbs, so replacement may involve the full assembly or a specific LED module instead of a standard bulb.

Not always. Trim level, lighting package, market, and body style can change the exact fitment. That is why the page is organized by lighting position instead of only by model name.

Confirm whether your brake light is an LED unit and inspect the housing before ordering parts. If the lamp is integrated, you may need a module or assembly rather than a conventional bulb.

The glove box light is listed as 2825. It is a small incandescent-style bulb used in several interior applications.

The trunk or cargo area light is also listed as 2825. Always compare the installed bulb and socket shape before purchasing a replacement.

They are listed as LED for the 2021 Audi TT. Even when the function is similar, the exact lamp design can differ by location, so it is best to match the bulb position on the chart.

Usually no. The exterior lighting shown on this page is listed as LED, and many of these positions are designed around LED assemblies. A halogen swap is generally not a direct fit and may not work correctly.

The license plate light is listed as LED. If your lamp is dim, flickering, or not working, check whether the issue is the LED unit, the connector, or the housing rather than assuming it is a standard bulb.

Check the rear lighting package and compare the installed lamp to the chart. The rear turn signal is listed as LED, but market and trim differences can still affect the exact replacement method.

Remove the existing bulb or inspect the lamp assembly, then compare the markings, connector style, and housing shape to the chart. This is especially important for LED exterior lights and for 2825 interior bulbs, where small differences can matter.

Yes. It covers exterior positions like headlights, fog lights, brake lights, turn signals, reverse lights, and license plate lights, as well as interior locations such as the dome light, map light, vanity mirror light, glove box light, trunk light, and interior door light.