For the 1998 Audi A4, the listed low-beam bulb is D2S. The supplied fitment data does not specify a high-beam bulb, so confirm the high-beam marking on the original lamp before ordering. Fog lights use H1 bulbs.
Exterior lighting varies by body style and configuration. Front turn signals use 2357A; Avant models are also listed with 2827, while Base models may use 2825 or 98. Front parking lights are listed as 2825 or 98 on Avant models with HID headlights, and 2357A on Base models.
- Rear turn signal and reverse light: 7506
- Brake, tail, and rear side marker: 7528
- Center stop light: 2723
- License plate and Avant courtesy light: 6418
- Dome and engine-area lighting: 6411 or 6428
Trunk-light fitment varies by body style and original lamp configuration, with listings including 6486X, 6418, 194, and 7441.