Subaru Ascent high beam headlight bulbs use 9005 size while low beam headlight bulbs use H11 size. The replacement chart covers 2019 to 2020 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 2019-2020 Subaru Ascent uses two distinct bulb types across its halogen capsule headlamp configuration: the 9005 for high beam and the H11 for low beam.
The 9005 is governed by the ANSI standard, which is the regulatory framework used in the United States and Canada. It is a single-filament halogen bulb rated at 12V and 65W, and it uses a P20d base.
The H11 follows the ECE standard, the regulatory framework used in Europe and internationally, though it also carries approval for use in the United States. It is a single-filament halogen bulb rated at 12V and 55W, fitted with a PGJ19-2 base.
The 9005 and H11 operate on different base types, P20d and PGJ19-2 respectively, meaning the two bulbs are not interchangeable with each other despite both being single-filament halogen types running on 12V.
The 9005 draws 65W while the H11 draws 55W, reflecting the higher power demand typically associated with high beam functions compared to low beam operation.
Both bulb types are specified exclusively for the Subaru Ascent trim configurations equipped with halogen capsule headlamps, indicating that other headlamp configurations on this vehicle fall outside this fitment data.