Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 1990 Hyundai Sonata.
Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.
Low beam
9004
High beam
9004
Factory setup
Factory headlight setup not identified
Representative car or sedan 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: 9004
Best direct replacement
Sylvania SilverStar Ultra
High/Low Beam Combined 9004
Estimated price$35-49
BulbFacts testedCorrect bulb size
Reflector Runner-Up
The SilverStar Ultra sits just behind the Night Breaker 200 among normal-wattage reflector picks, but it remains a strong practical choice because it is easy to find and has a whiter beam appearance than many basic halogen bulbs.
BulbFacts testedCorrect bulb sizeprojector housing only
Best Premium Distance
The Morimoto XB Elite remains the premium performance benchmark from the current HID recommendations. It tested as one of the strongest 35W projector-focused HID kits and is the better fit when you want a complete, higher-quality conversion kit instead of a generic marketplace option.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation. Use the LED upgrade path only with a reflector housing and confirm beam pattern and glare after installation. Use the HID upgrade path only with a projector housing; it is not a reflector-housing recommendation.
Other bulbs
Available exterior and interior lighting data for this model year.
Cargo / Trunk Light
6418Verify installed bulb
Center High Mount Stop Light
921Verify installed bulb
Check Engine Indicator
37Verify installed bulb
Courtesy Light
DE3022Verify installed bulb
Dome Light
DE3175Verify installed bulb
Front Turn Signal
2357AVerify installed bulb
Glove Box Light
1891Verify installed bulb
High Beam Indicator
37Verify installed bulb
Instrument Panel Light
158Verify installed bulb
License Plate Light
97Verify installed bulb
Parking Light
2357AVerify installed bulb
Parking Brake Indicator
37Verify installed bulb
Rear Turn Signal
1156Verify installed bulb
Reverse Light
1156Verify 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
9004
Bulb size confirmed
Other Hyundai Sonata years
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.
