For the 2018 Audi S5, the supplied fitment data lists LED bulbs for both the low-beam and high-beam headlights. No separate replacement bulb code is provided for either headlight position, so confirm the existing lamp assembly and vehicle configuration before ordering.
- Front lighting is LED for the low beam, high beam, daytime running light, parking light, cornering light, front turn signal, and front side marker.
- The supplied data does not list a fog-light fitment.
- Rear exterior lighting is also listed as LED, including the brake, center stop, tail, reverse, rear turn signal, and rear side-marker lights.
- Interior and convenience lighting is predominantly LED, including the dome, map, trunk, vanity, step, and general interior lights.
- The glove-box light is the notable exception, listed as bulb 2821.
Because the headlight entries are identified only as LED, use the complete lamp assembly or the original bulb information to verify compatibility rather than substituting a halogen bulb code.