HELLA 6418 LED Performance Bulb
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Audi TT 2004 Bulb Size
Bulb size chart
6418 Bulbs
Used for: Courtesy Light Bulb
6411 Bulbs
Used for: Dome Light Bulb
6428 Bulbs
Used for: Dome Light Bulb
2821 Bulbs
Used for: Glove Box Light Bulb
64111 Bulbs
Used for: Map Light Bulb
2825 Bulbs
Used for: Trunk or Cargo Area Light
98 Bulbs
Used for: Trunk or Cargo Area Light
If you are looking for bulb sizes for the 2004 Audi TT, this page is organized to help you verify the correct replacement by lighting position. Instead of guessing from the model name alone, you can match the bulb to the exact location, such as the dome light, map light, glove box light, courtesy light, or trunk or cargo area light.
The 2004 Audi TT can use different interior lighting setups depending on trim, body style, and market. That is why a year-specific bulb chart is useful: it helps narrow down the correct bulb size for each position before you buy, so you can replace the right bulb with less trial and error.
For the best fitment results, always compare the bulb listed on this page with the bulb already installed in your car before ordering. Trim and lighting package differences can change what is used in a specific position, and some cars may have halogen bulbs while others have been converted to LED replacements. If your TT has aftermarket interior lighting, the bulb shape may still match but the light output, polarity, or heat profile can differ from the original setup. Checking the existing bulb, connector style, and housing clearance first is the safest way to avoid returns and ensure a proper fit.
FAQ
What bulb size does the 2004 Audi TT use for the trunk or cargo area light?
The trunk or cargo area light on the 2004 Audi TT may use 2825 or 98, depending on the exact lighting setup.
What bulb size fits the glove box light on a 2004 Audi TT?
The glove box light bulb listed for the 2004 Audi TT is 2821.
What bulb size is used for the dome light on a 2004 Audi TT?
The dome light bulb for the 2004 Audi TT may be 6411 or 6428.
What bulb size fits the courtesy light on this car?
The courtesy light bulb listed for the 2004 Audi TT is 6418.
What bulb size is used for the map light on a 2004 Audi TT?
The map light bulb listed for the 2004 Audi TT is 64111.
Why does the 2004 Audi TT have more than one possible bulb size for some positions?
Audi used different interior lighting configurations across trim levels, body styles, and markets, so more than one bulb size can appear for the same lighting position.
Does this page help with both coupe and roadster versions of the 2004 Audi TT?
Yes, but fitment can still vary by body style and package, so it is important to confirm the bulb in your specific car before buying.
Can I replace the original bulbs with LED bulbs in my 2004 Audi TT?
Yes, many owners choose LED replacements, but you should confirm fitment, polarity, and housing clearance before installing them.
Will an aftermarket LED bulb always fit the same way as the original bulb?
Not always. Even if the base size matches, aftermarket LED bulbs can differ in length, brightness, heat, and electrical behavior.
What should I check before ordering a replacement bulb for my Audi TT?
Check the bulb size listed for the lighting position, then compare it with the bulb currently installed in the vehicle to confirm the fit.
Are the interior bulb sizes on the 2004 Audi TT the same in every market?
No, market differences can affect the lighting package and the bulb used in a given position.
What is the safest way to avoid buying the wrong bulb for this car?
Use the bulb chart by lighting position, verify the installed bulb, and match the replacement to the exact application in your 2004 Audi TT.