Factory headlight setup not identified

2003 Infiniti Q45 Headlight Bulbs & Lighting Guide

Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 2003 Infiniti Q45.

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

Low beam
D2S
High beam
H1
Factory setup
Factory headlight setup not identified
Representative car or sedan image for 2003 Infiniti Q45
Representative car or sedan image

Best headlight upgrades

Confirm the installed headlight configuration before using a bulb size or product recommendation. BulbFacts does not merge products from different factory systems.

Factory headlight setup not identified

Low Beam: D2S ยท High Beam: H1

Select your factory headlight system. Choose or verify the installed factory headlight system before using a bulb size or product recommendation.

Other bulbs

Available exterior and interior lighting data for this model year.

Cargo / Trunk Light
158Verify installed bulb
Center High Mount Stop Light
921Verify installed bulb
Front Side Marker
168Verify installed bulb
Front Turn Signal
1156Verify installed bulb
License Plate Light
168Verify installed bulb
Parking Light
168Verify installed bulb
Rear Turn Signal
7440AVerify installed bulb
Reverse Light
921Verify installed bulb
Technical details and sources

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

PositionBulb or systemFitment status
Low BeamFactory system not specifiedD2SBulb size confirmed
High BeamFactory system not specifiedH1Bulb size confirmed

Each model year opens its own BulbFacts record. Bulb sizes and factory systems are not carried over from adjacent years.

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.