Acura SLX front turn signal bulbs use 1157 size while rear turn signal bulbs use 1156 size. The replacement chart covers 1996 to 1999 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Acura SLX uses the 1157 bulb for the front turn signal across all model years from 1996-1999.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single housing, operating at 21W on the primary filament and 5W on the secondary filament.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to prevent incorrect installation of the bulb into the socket.
The rear turn signal on the Acura SLX calls for the 1156 bulb across all model years from 1996-1999.
The 1156 is a single-filament bulb rated at 21W, dedicated to one lighting function rather than the dual-purpose role of the 1157.
The 1156 uses a BA15s bayonet base, which has two pins at equal heights, making it physically incompatible with the BAY15d socket used by the 1157 front turn signal.
Both the 1157 and 1156 operate on a 12V electrical system and conform to ANSI standards recognized in both the United States and Canada.
Although the 1157 and 1156 share a similar 15mm bayonet base style and an identical primary filament wattage of 21W, their pin configurations differ, and the two bulb types are not interchangeable between front and rear sockets.