Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 1986 Buick Regal.
Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.
Low beam
Not listed
High beam
H4651
Factory setup
Factory headlight setup not identified
Representative car or sedan image
Best headlight upgrades
BulbFacts has a supported bulb-size record, but does not currently have enough applicable product evidence to show a responsible recommendation for this headlight system.
Fitment confirmed; product evidence is limited. 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.
Confirm the installed bulb, connector, housing, and factory system before ordering.
Position
Bulb or system
Fitment status
High BeamFactory system not specified
H4651
Bulb size confirmed
Other Buick Regal 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.
