2018 Audi A4 Bulb Size
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Bulbs Chart
2018 Audi A4 Headlight Bulb High Beam and Low Beam(with HID headlights) (D5S)
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Best Choice
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...
Philips D5S Standard Authentic Xenon
Xenon HID Conversion Kit
2018 Audi A4 Headlights
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2018 Audi A4 Tail Lights
Audi A4 Bulb Size By Years
Goal: If you’re replacing bulbs on a 2018 Audi A4, this size chart removes guesswork by listing the correct bulb types for each lamp location. Start with the problem: wrong bulbs cause poor lighting, fitment issues, or blown fuses. The chart is a recommended quick reference that reflects common OEM sizes and practical replacements, with trade-offs noted where sizes vary.
Prerequisites and step by step: verify your vehicle’s trim and production month, remove the old bulb to confirm the base type, and match it to the chart before buying. Validation: check fit and function after installation and confirm no dashboard warnings.
Troubleshooting and wrap up: if a bulb doesn’t seat or flickers, recheck the base and connector. Note: some links on this page are affiliate links; I may earn a commission at no extra cost to you.
2018 Audi A4 specs
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