Audi A5 2018 Bulb Size

Bulb size chart

Fog Light Bulb Front - H8 LED
Headlight Bulb High Beam - D5S
Headlight Bulb Low Beam - D5S
Back Up Reverse Light Bulb - LED
Brake Light Bulb - LED
Center High Mount Stop Light Bulb - LED
Cornering Light Bulb - H8 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
Tail Light Bulb - LED
Turn Signal Light Bulb Front - 12181NA
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

H8 LED Bulbs

Used for: Fog Light Bulb Front, Cornering Light Bulb

Sealight L2 Series

Sealight L2 Series

Prevents blinding on-coming vehicles: these light bulbs utilize the super high quality and most modern technology LED chips. This technology helps you get a LED array similar to the filament inside of an original halogen bulb. This creates a nice cut line on top of the beam. No pain in replacing bulbs often: a maximum level of heat dissipation is achieved when they are in use thanks to the ball-bearing cooling fan, the copper thermal heat sink, and the high-density aluminum body, ensuring up to 50,000 hrs lifespan.

$27.94

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View all 4 replacement options for size H8 LED →

D5S Bulbs

Used for: Headlight Bulb High Beam, Headlight Bulb Low Beam

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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View all 10 replacement options for size D5S →

12181NA Bulbs

Used for: Turn Signal Light Bulb Front

View all 10 replacement options for size 12181NA →

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 A5 bulb size page helps you verify the correct bulbs by lighting position before you buy replacements. Whether you are looking for exterior bulbs, interior bulbs, or headlight and fog light fitment, the goal is to make it easier to match the right bulb to the right socket on your A5.

The 2018 Audi A5 uses a mix of LED and halogen-style bulb listings depending on the lamp location and equipment level. Because trim and lighting package can vary by market and body style, checking the position-specific bulb chart is the best way to confirm what your car uses.

For the best fitment results, compare your A5’s installed bulbs with the chart before ordering, especially if your car has a different trim, package, or regional lighting setup. Some positions on the 2018 Audi A5 are listed as LED, while others use specific bulb types such as D5S, H8 LED, 2821, or 12181NA, so do not assume every lamp on the car uses the same design. If you are converting from halogen to LED or replacing an aftermarket upgrade, make sure the bulb is compatible with the housing, connector, and any warning-canceling electronics your vehicle may need.

FAQ

What bulbs does the 2018 Audi A5 use for the low beam headlights?

The 2018 Audi A5 low beam headlight bulb is listed as D5S. Always confirm the installed setup on your car, since lighting packages can vary by market and trim.

What is the high beam bulb for a 2018 Audi A5?

The high beam headlight bulb is listed as D5S on this page. Checking the existing bulb and housing before purchase is still recommended.

What bulb fits the front fog lights on a 2018 Audi A5?

The front fog light bulb is listed as H8 LED. If your car has been modified or converted, verify the connector and fitment before ordering.

What bulb is used for the cornering light on the 2018 Audi A5?

The cornering light bulb is listed as H8 LED. This is one of the positions that can be affected by trim or lighting package differences.

What bulb does the front turn signal use on the 2018 Audi A5?

The front turn signal light bulb is listed as 12181NA. If your A5 has an alternate lighting package, check the installed bulb to confirm.

Are the brake lights and tail lights on the 2018 Audi A5 LED?

Yes, the brake light bulb and tail light bulb are both listed as LED on this page. That includes the rear lighting positions shown in the chart.

What is the reverse light bulb for a 2018 Audi A5?

The back up reverse light bulb is listed as LED. It is a good idea to verify the exact lamp assembly before replacing it.

What bulb does the license plate light use on the 2018 Audi A5?

The license plate light bulb is listed as LED. This is usually a straightforward replacement, but fitment should still be checked against the installed bulb.

What interior bulbs are listed for the 2018 Audi A5?

Interior positions listed on this page include the vanity mirror light, trunk or cargo area light, dome light, map light, interior door light, and glove box light. The glove box light bulb is listed as 2821.

Does the 2018 Audi A5 have different bulb fitment by trim or body style?

Yes. Trim, lighting package, and body style can change bulb fitment, so the same model year may not use identical bulbs in every market or configuration.

Can I replace LED bulbs on the 2018 Audi A5 with aftermarket LED upgrades?

Yes, but you should confirm compatibility carefully. Aftermarket LED replacements can differ in brightness, polarity, error reporting, and physical fit, especially on Audi lighting systems.

Should I check the installed bulb before buying replacements?

Yes. Checking the installed bulb is the safest way to confirm fitment, especially for positions that may vary by package or region. The chart is a guide, but the actual bulb in the car is the final reference.

Audi A5 Bulb Size by Year