Factory headlight setup not identified

2018 Audi Q7 Headlight Bulbs & Lighting Guide

Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 2018 Audi Q7.

Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.

Low beam: D5S
High beam: D5S
Factory setup: Factory headlight setup not identified

Representative SUV or crossover image for 2018 Audi Q7 — Representative SUV or crossover image

Best headlight upgrades

These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.

Factory headlight setup not identified

High/Low Beam Combined: D5S

Factory Xenon replacement

DDM Tuning Ultra Xenon

High/Low Beam Combined D5S

Estimated price$50

BulbFacts testedCorrect bulb size

Best Value

The DDM Ultra Xenon is the value pick because the 5500K version delivers strong low-beam performance at a much lower price than the major premium brands.

Measured vs factory Xenon referenceMeasured test

Low beam+43% light

Reference 408 lux · Upgrade 583 lux

High beam+2% light

Reference 807 lux · Upgrade 824 lux

Color5,500K 1,100K cooler

Reference 4,400K · Upgrade 5,500K · 5000K pure white

General BulbFacts housing test

Read BulbFacts review Compare test results Buy at BRI Source

A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.

Other bulbs

Available exterior and interior lighting data for this model year.

Door Light: 2825Verify installed bulb
Front Turn Signal: 64132Verify installed bulb
Rear Fog Light: 921Verify installed bulb
Rear Side Marker: 2821Verify installed bulb
Reverse Light: 921Verify installed bulb

Technical details and sources

Confirm the installed bulb, connector, housing, and factory system before ordering.

Position	Bulb or system	Fitment status
High/Low Beam CombinedFactory system not specified	D5S	Bulb size confirmed

Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.