Bulb size & fitment reference

2003 Audi RS6
Bulb Size Guide

Get the bulb-size answer first, then check factory-system differences and position-specific notes before buying.

Select Your Vehicle

Quick Answer

Start with the positions you’re most likely to replace. Full fitment details are below.

High Beam

H7

Shop this position →

Low Beam

D2S

Shop this position →

Reverse Light

1156 / BA15S

Shop this position →

Brake Light

1157

Shop this position →

Before You Buy: Factory Lighting Can Vary

Your vehicle may use different factory lighting systems. Check the applicable system before ordering.
Halogen bulb example

Halogen

Halogen bulbs are the standard factory bulbs and are easy to replace.

HID bulb and ballast example

HID

HID bulbs provide higher intensity light and require a ballast.

Full Bulb Fitment by Lighting Position

Find the bulb size for each lighting position and check any fitment notes before ordering.
Lighting PositionBulb SizeNoteNext Step
High BeamH7Shop position →
Low BeamD2SShop position →
Fog LightH7Shop position →
Front Turn Signal3157 / 3156Shop position →
Parking LightT10 / 194 / 168Shop position →
Rear Turn Signal1156 / BA15SShop position →
Brake Light1157Shop position →
Tail Light1157Shop position →
Reverse Light1156 / BA15SShop position →
License Plate Light36MMShop position →
Front Side Marker Light3157 / 3156Shop position →
Rear Side Marker Light1157Shop position →
Dome Light36MMShop position →
Interior Door LightT10 / 194 / 168Shop position →
Vanity Mirror Light36MMShop position →
Glove Box Light36MMShop position →
Stepwell Light36MMShop position →
Engine Compartment Light36MMShop position →
Fitment Reminder
Bulb size can vary by factory setup. If you're unsure which option applies to your vehicle, confirm your current bulb or select your configuration on the product page.View Fitment Options →