The Acura SLX front side marker uses a 194 bulb size while the rear side marker requires a 1157 bulb size. The replacement chart covers 1996 to 1999 vehicle 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 Acura SLX uses two distinct bulb types across its side marker positions for the 1996-1999 model years: the 194 at the front and the 1157 at the rear.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards applicable in both the US and Canada.
The T10 wedge base design means the 194 bulb is retained by friction rather than a locking mechanism, requiring no rotation during installation or removal.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W high filament and a 5W low filament, also conforming to ANSI standards for the US and Canada.
The dual-filament construction of the 1157 allows it to serve two independent electrical circuits within a single bulb, which is a common arrangement in rear lighting positions that combine marker and brake or turn signal functions.
The BAY15d bayonet base of the 1157 features two offset pins, a physical design that prevents incorrect insertion of a single-filament substitute with a BAY15s base.
The front side marker position on the Acura SLX calls for the 194 across all four model years, with no variation in specification between 1996 and 1999.
The rear side marker position on the Acura SLX calls for the 1157 across all four model years, with no variation in specification between 1996 and 1999.
The 194 and 1157 are not interchangeable with each other, as they differ in base type, wattage, filament count, and physical form factor.