What is the low beam headlight bulb size for a 2009 Audi TT?

The 2009 Audi TT uses a HID-D1S LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2009 Audi TT?

The high beam bulb size for the 2009 Audi TT is HID-D1S LED.

Why are my 2009 Audi TT headlights dim?

Dim headlights on a 2009 Audi TT can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D1S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2009 Audi TT fog light?

The 2009 Audi TT uses a H7 LED bulb for the fog light position.

Is the 2009 Audi TT single or dual beam?

The 2009 Audi TT uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2009 Audi TT?

Yes, the 2009 Audi TT comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D1S LED LED conversion kit for the low beams.

Does the 2009 Audi TT have fog lights?

Yes, the 2009 Audi TT takes a H7 LED bulb for the fog light position.

Did the 2009 Audi TT change headlight bulb sizes from the previous year?

No — the 2009 Audi TT uses the same bulb sizes as the 2008 model. This configuration has been consistent across the 2008–2010 generation.

How do I change the headlight on a 2009 Audi TT?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old HID-D1S LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. Note: Audi vehicles use a CANbus system, so LED replacements may need an anti-flicker decoder. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2009 Audi TT?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved HID-D1S LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2009 Audi TT headlights?

A pair of HID HID-D1S LED bulbs costs $50 to $150. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2009 Audi TT?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the HID-D1S LED position are available as direct plug-and-play replacements. Since the Audi uses CANbus monitoring, choose a CANbus-compatible LED kit to avoid dashboard errors.

The 2009 Audi TT shares its bulb sizes with the 2008–2010 generation.

Fitment Guaranteed for 2009 Audi TT

What Size Bulbs Does a 2009 Audi TT Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2009 Audi TT Have?

Lighting on the 2009 Audi TT is managed by a total of 12 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D1S projector housings for high-intensity output. This model belongs to the mid years of the TT's 2000-2019 production span. Note that Audi vehicles typically feature a CANbus electrical monitor that checks for specific bulb resistance.

LED Flicker Warning

This vehicle is known to use a CANbus system. Installing standard LEDs may cause flickering.

Use a CANbus decoder.

Can You Put LED Bulbs in a 2009 Audi TT?

The 2009 Audi TT is already equipped with factory D1S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H7 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2009 Audi TT Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D1S LED	Buy HID-D1S LED →
High Beam	HID-D1S LED	Buy HID-D1S LED →
Fog Light	H7 LED	Buy H7 LED →
Brake Light	LED Bulb	Buy LED Bulb →
Side Marker	64132 LED	Buy 64132 LED →
Turn Signal Front	7507 LED	Buy 7507 LED →
Turn Signal Rear	921 LED	Buy 921 LED →
License Plate	6418	Buy 6418 →
Map Light	2825	Buy 2825 →
Parking Light	64132	Buy 64132 →
Reverse Light	921	Buy 921 →
Trunk Light	2825	Buy 2825 →

How do the 2009 Audi TT's bulbs compare to other years?

The 2009 Audi TT uses the same bulbs as the 2008 model.

The 2010 model continues with the same bulb sizes.

This bulb configuration covers the 2008–2010 model years. ← 2008 2010 →

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Other TT Years

2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2008 2006 2005 2003 2002 2001 2000

Other Vehicles That Use HID-D1S LED Bulbs

2019 BMW X6 2019 Genesis G80 2019 Mercedes-Benz Benz GLS450 2019 Mercedes-Benz Benz GLS550 2019 Mercedes-Benz Benz GLS63 AMG 2019 Mercedes-Benz Benz SLC300