Chrysler Fifth Avenue brake bulbs utilize 1157 and 1156 sizes, while the center high mount stop light requires a 921 bulb size. The replacement chart covers vehicle production spanning 1983 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1157 bulb is the most frequently specified brake bulb for the Chrysler Fifth Avenue, covering the 1983-1985 and 1987-1989 model years.
The 1157 is a dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base. The dual-filament design allows a single bulb to serve both brake and tail light functions.
The 1986 Chrysler Fifth Avenue brake light uses the 1156 bulb rather than the 1157 found in surrounding model years, making it a fitment exception within the lineup.
The 1156 is a single-filament bulb rated at 12V and 21W, using a BA15s bayonet base. Although its base visually resembles the BAY15d base of the 1157, the two are not interchangeable due to differences in filament count and base pin alignment.
The BAY15d base of the 1157 features offset locating pins that prevent incorrect installation of a single-filament 1156, which uses a symmetrical BA15s base. Substituting one for the other would result in incorrect lighting function.
The Center High Mount Stop Light on the Chrysler Fifth Avenue uses the 921 bulb across the 1986-1989 model years.
The 921 is a wedge-type bulb in the T15 form factor, rated at 12V and 16W. Wedge bulbs rely on the tension of their wire leads for retention rather than a bayonet locking mechanism.
The 921 wedge bulb operates on a single filament and is dedicated solely to the stop light function in the Center High Mount position, unlike the dual-filament 1157 used at the rear brake positions.