Audi A4 2018 Bulb Size

Bulb size chart

Headlight Bulb High Beam and Low Beam(with HID headlights) - D5S
Headlight Bulb High Beam and Low Beam(with LED headlights) - LED
Back Up Reverse Light Bulb - LED
Brake Light Bulb - LED
Center High Mount Stop Light Bulb - LED
Cornering Light Bulb - LED
Daytime Running Light Bulb - LED
License Plate Light Bulb - LED
Parking Light Bulb - LED
Side Marker Light Bulb Front - LED
Side Marker Light Bulb Rear - LED
Stepwell Light Bulb - LED
Tail Light Bulb - LED
Turn Signal Light Bulb Front(with HID headlights) - 64132
Turn Signal Light Bulb Front(with LED headlights) - LED
Turn Signal Light Bulb Rear - LED
Dome Light Bulb - LED
Glove Box Light Bulb - 2821
Interior Door Light Bulb - LED
Map Light Bulb - LED
Trunk or Cargo Area Light - LED
Vanity Mirror Light Bulb - LED

D5S Bulbs

Used for: Headlight Bulb High Beam and Low Beam(with HID headlights)

Philips D5S Standard Authentic Xenon

Philips D5S Standard Authentic Xenon

POWERFUL LIGHT FROM XENON HID BULBS OFFER MAXIMUM SAFETY: Xenon HID (High Intensity Discharge) headlight bulbs offer twice as much light* for safer driving in all conditions while consuming 50% less power. The intense white light produced by the Xenon HID lamps is comparable to daylight. Studies have demonstrated that xenon automotive lighting helps drivers to concentrate on the road and to distinguish obstacles and road signs much faster than traditional lamps. *Compared to standard halogen bulbs

$99.00

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64132 Bulbs

Used for: Turn Signal Light Bulb Front(with HID headlights)

VEHICODE White 64132 LED Bulbs

VEHICODE White 64132 LED Bulbs

Introducing the VEHICODE White 64132 LED Bulbs, the perfect lighting solution for a wide range of applications. With advanced features and reliable performance, these bulbs are designed to enhance your driving experience. Equipped with 5 high-power SMD-3030 LED chips, these bulbs deliver impressive brightness, producing 370 lumens per bulb. With an output wattage of 1.7W per bulb, they provide efficient lighting while conserving energy. The working voltage range of 10-30V ensures compatibility with various vehicles. Experience the crisp and vibrant illumination of the 6000K-6500K white color temperature, creating a modern and stylish look for your vehicle. These bulbs boast an exceptional lifespan of up to 30,000 hours, ensuring long-lasting reliability and reduced maintenance.

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2821 Bulbs

Used for: Glove Box Light Bulb

WLJH 6000K White 2821 Light Bulbs

WLJH 6000K White 2821 Light Bulbs

WLJH LED bulbs are a simple and cost-effective way to upgrade your vehicle's Instrument Panel lighting. Replace your old dingy incandescent bulbs with a long-lasting LED bulb for the Instrument Panel cluster. Not only do the WLJH LED bulbs come in modern cool; lighting, but they are also offered in an array of colors allowing you to customize the dash of your vehicle. from the original, orange-sleeved, incandescent bulb illumination to other vivid color LED illumination. Super Bright 3-SMD LED 3030 Chipset  - 300% brighter than stock lamps. Latest LED Technology - no flickering, no UV light emission,no irradiation. Easy plug-and-play installation - no polarity, no soldering or modifications needed, plug-and-play led. High-Quality Aluminum Body  - low temperature, low power consumption, long-lasting life of up to 60,000 hours.

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View all 11 replacement options for size 2821 →

This 2018 Audi A4 bulb size page is designed to help you verify the correct bulbs by lighting position, so you can replace the right lamp without guessing. Because Audi used different lighting packages and trim combinations, the exact bulb setup can vary by market and body style, but this page organizes the common exterior and interior locations in one place.

Use it as a quick reference for items like the headlights, tail lights, brake lights, license plate lights, turn signals, and cabin lights on the 2018 Audi A4. Whether you are replacing a single burned-out bulb or planning a full lighting refresh, checking by position makes it easier to match the correct fitment before you buy.

For the best fit, always compare the bulb chart with your specific A4’s trim and lighting package, since halogen, HID, and LED-equipped cars may use different parts in the same location. This is especially important on aftermarket conversions, where a previous owner may have changed the headlight setup or interior lamps. If you are unsure, inspect the installed bulb before ordering and confirm the connector style, base type, and housing design so you do not end up with the wrong replacement.

FAQ

What bulbs does the 2018 Audi A4 use for the headlights with LED headlights?

On 2018 Audi A4 models equipped with LED headlights, the high beam and low beam bulbs are listed as LED. The front turn signal bulb is also listed separately for LED headlight vehicles.

What headlight bulb is used on the 2018 Audi A4 with HID headlights?

For A4 models with HID headlights, the headlight bulb for both high beam and low beam is D5S. The front turn signal bulb for HID headlight vehicles is listed as 64132.

Are the brake lights on the 2018 Audi A4 LED?

Yes. The brake light bulb is listed as LED on this page for the 2018 Audi A4.

What is the license plate light bulb size for a 2018 Audi A4?

The license plate light bulb is listed as LED. That means the assembly uses an LED light source rather than a traditional replaceable incandescent bulb in the charted setup.

Does the 2018 Audi A4 use LED bulbs for the tail lights and parking lights?

Yes. The tail light bulb and parking light bulb are both listed as LED for the 2018 Audi A4.

What bulb is used for the glove box light on the 2018 Audi A4?

The glove box light bulb is listed as 2821.

Are the interior dome, map, vanity mirror, and door lights LED on the 2018 Audi A4?

Yes. The dome light, map light, vanity mirror light, and interior door light are all listed as LED on this page.

What is the front turn signal bulb on a 2018 Audi A4 with LED headlights?

For A4 models with LED headlights, the front turn signal bulb is listed as LED.

What is the front turn signal bulb on a 2018 Audi A4 with HID headlights?

For A4 models with HID headlights, the front turn signal bulb is listed as 64132.

Does the 2018 Audi A4 have different bulb listings for trim or market differences?

Yes. Trim and lighting package can vary by market and body style, so some bulb positions may differ depending on the exact vehicle configuration.

What should I check before buying replacement bulbs for my 2018 Audi A4?

Check the installed bulb or the original housing first, then confirm the lighting position, connector, and whether your car has LED, HID, or another lighting package. That is the safest way to avoid ordering the wrong part.

Can I use this page to replace rear turn signal, reverse, and side marker bulbs on the 2018 Audi A4?

Yes. The page includes the rear turn signal bulb, back up reverse light bulb, side marker light bulb front, and side marker light bulb rear, making it easier to match each position to the correct fitment.

Audi A4 Bulb Size by Year