Dodge Challenger Back Up Light Bulb Size

Additional Notes

• The Dodge Challenger back up light specifications cover two distinct production eras: model years 2008-2014 and model years 1970-1983.
• Three bulb types appear across these specifications: the 921, the 1156, and the 1141, all of which conform to ANSI standards recognized in both the United States and Canada.
• The 921 is a T15 wedge-style bulb rated at 12V and 16W. Its wedge base design means it connects by inserting directly into a socket without any locking mechanism, relying on friction to hold it in place.
• The 1156 and 1141 are both single-filament bulbs sharing the BA15s bayonet base, a mount type that uses two side pins and a twist-lock motion to secure the bulb. Both are rated at 12V and 21W.
• Because the 1156 and 1141 share the same BA15s base and identical voltage and wattage ratings, they are generally considered interchangeable in many fitment contexts, though the specific application listed in these specifications assigns each to distinct model years.
• The Dodge Challenger (2008-2014) uses the 921 wedge bulb exclusively for the back up light position across all seven of those model years.
• Model years 1971-1974 and 1978-1983 are specified with the 1156 bulb, while the 1970 Dodge Challenger is the sole model year assigned the 1141 bulb in these specifications.
• The 921 operates at 16W, which is notably lower than the 21W rating of both the 1156 and 1141, reflecting a difference in power draw between the wedge and bayonet base bulb families used across these generations.
• The wedge base of the 921 and the BA15s bayonet base of the 1156 and 1141 are physically incompatible socket types, meaning bulbs from the earlier generation cannot be substituted into the 2008-2014 socket housings, and vice versa.