Audi A4 2012 Bulb Size
Bulb size chart
This 2012 Audi A4 bulb size guide helps you verify the correct bulbs by lighting position, so you can match the right part before you buy. Whether you are replacing an exterior lamp or a small interior bulb, using the position-specific chart makes it easier to confirm fitment for your exact A4 setup.
The 2012 Audi A4 can use different bulb types depending on trim, lighting package, market, and body style. Some positions are LED-based, while others use replaceable halogen-style bulbs, so it is important to check the location on the vehicle and compare it with the chart for your specific configuration.
For best results, confirm whether your 2012 Audi A4 has halogen headlights or HID headlights before ordering replacement bulbs, since several front and rear lighting positions differ between those setups. Trim and package differences can also affect fitment, especially on cars with factory LED lighting or optional fog light equipment. If you are converting to aftermarket LED bulbs, make sure the bulb base, polarity, and physical clearance match the housing, and remember that some conversions may require additional resistors or adapters. When possible, remove the installed bulb first and compare it to the replacement before purchase, especially for interior and cargo-area lights where multiple bulb numbers may appear in the same position.
FAQ
What does this 2012 Audi A4 bulb chart help me verify?
It helps you verify bulb sizes by lighting position, such as headlight, fog light, tail light, license plate light, dome light, and interior lamps. That makes it easier to buy the correct replacement for the exact spot you need.
Does the 2012 Audi A4 use the same bulbs on every trim?
No. Trim, lighting package, market, and body style can change the bulb type in some positions. Always match the bulb to the specific lighting location on your car.
What headlight bulb does the 2012 Audi A4 use with HID headlights?
The headlight bulb high beam and low beam is listed as D3S for HID-equipped models.
Which bulb is used for the back up reverse light on this A4?
The back up reverse light bulb is 921.
What are the front fog light bulb options for the 2012 Audi A4?
The front fog light bulb is listed as H11 LED or H16 LED, depending on the vehicle configuration.
What bulb is used for the front turn signal on the 2012 Audi A4?
The front turn signal light bulb is 12272NA.
What bulb fits the rear turn signal on this model?
The rear turn signal light bulb is 7506.
Are the brake and tail light bulbs the same on halogen and HID versions?
No. On HID-headlight models, the brake light bulb and tail light bulb are listed as LED. On halogen-headlight models, both the brake light bulb and tail light bulb are 7506R.
Which interior bulbs use 2825 or 98 on the 2012 Audi A4?
The glove box light, trunk or cargo area light, map light, interior door light, and side marker light front are listed with 2825 or 98 bulb options.
What bulb is used for the dome light and vanity mirror light?
The dome light bulb is listed as 6411 or 6428, and the vanity mirror light bulb is 6418.
What bulb fits the license plate lights?
The license plate light bulb is 6418.
Should I check the installed bulb before ordering a replacement?
Yes. Checking the installed bulb is a smart way to confirm fitment, especially if your A4 has optional lighting equipment or if the car has been modified with aftermarket bulbs.