Toyota Supra front and rear turn signal bulbs utilize 7440 and 1156 bulb sizes across the model line. The replacement chart covers 1986 to 1998 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 Toyota Supra uses two distinct bulb types across its turn signal specifications: the 1156 and the 7440. Both are ANSI-standard single-filament bulbs rated at 12V and 21W, making them identical in electrical output despite differing in physical construction.
The 1156 bulb features a BA15s bayonet base, which uses a single contact pin to lock into its socket with a twist. This base style is among the most widely used in automotive lighting and is not interchangeable with wedge-style sockets.
The 7440 is a T20 wedge bulb, meaning it is held in place by the socket gripping the base of the glass envelope rather than by a bayonet pin. This physical difference makes the 7440 and 1156 incompatible with each other's sockets, even though both operate at the same voltage and wattage.
The 1156 bulb applies to both the front and rear turn signals on the Toyota Supra for model years 1986-1996, representing the majority of the production span covered in these specifications.
The 7440 bulb applies to both the front and rear turn signals for the 1997-1998 model years, indicating a socket type change from the earlier BA15s bayonet format to the T20 wedge format during that period.
Because the bulb type change affects both the front and rear positions simultaneously in 1997, a vehicle from 1996 and one from 1997 require entirely different replacement bulbs for all four turn signal positions despite being consecutive model years.
Both the 1156 and 7440 are covered under ANSI standards applicable in the United States and Canada, meaning replacements sourced within those markets are expected to conform to the same standardized specifications.
The single-filament design of both bulb types reflects their dedicated turn signal function, as dual-filament bulbs are typically reserved for positions that serve more than one lighting purpose, such as combined stop and tail lamp assemblies.