Ram 2500 Headlight Bulb Size

Additional Notes

• The 9005 bulb is the most frequently specified high beam bulb across the Ram 2500 lineup, appearing in every model year from 2011 through 2024, either as the sole high beam option or as one of two configurations depending on headlamp count or type.
• The 9005 follows the ANSI standard used in the US and Canada. It is a single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base.
• The H11 is the most frequently specified low beam bulb across the Ram 2500 lineup, covering 2011-2024 in various configurations. It follows the ECE standard and carries US approval as well, operating as a single-filament halogen bulb rated at 12V and 55W with a PGJ19-2 base.
• The 9008 is a dual-filament halogen bulb rated at 12V with separate wattage values of 65W for high beam and 55W for low beam. It uses a P26t base and serves both beam functions within a single bulb, which is why it is listed under both the high beam and low beam positions for the Ram 2500 in 2011 and 2012 with 2-headlamp configurations.
• In 2011 and 2012, the Ram 2500 headlamp configuration directly determines bulb fitment. The 2-headlamp setup uses the 9008 for both high and low beam functions, while the 4-headlamp setup uses the 9005 for high beam and the H11 for low beam. These two configurations are not interchangeable.
• The 9012 bulb is specified for the low beam position on the Ram 2500 with projector-type headlamps in 2013-2015. It is an ANSI-standard single-filament enhanced halogen bulb rated at 12V and 55W, using a PX22d base.
• Although the 9005 and 9012 share the same voltage and wattage ratings, they use different bases, the P20d and PX22d respectively, making them physically non-interchangeable despite their similar electrical characteristics.
• For 2016-2018, the low beam bulb specification splits between two headlamp types. Projector-type headlamps use the 9005, while non-projector configurations use the H11. Both the 9005 and H11 are single-filament halogen bulbs, but they use different bases and are not interchangeable.
• In 2019 and 2020, both the high beam and low beam specifications carry the qualifier "With Halogen Capsule Headlamps," indicating that these bulb sizes apply specifically to that headlamp variant.
• The 9005 and H11 operate on the same 12V system but differ in wattage, with the 9005 rated at 65W and the H11 at 55W, and in base type, making direct substitution between them incompatible regardless of shared voltage.