International L151 utilizes 194 bulb size for front side marker and 97 bulb size for rear side marker applications. The replacement chart covers 1951 to 1952 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 International L151 uses the 194 bulb for the front side marker position across the 1951-1952 model years, within the Light Duty classification.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards recognized in both the United States and Canada.
The T10 wedge base on the 194 bulb requires no locking pin or bayonet twist for installation, as the wedge-shaped base itself secures the bulb within the socket.
The rear side marker position on the International L151 (1951-1952, Light Duty) calls for the 97 bulb, a higher-wattage unit than its front counterpart.
The 97 bulb uses a BA15s bayonet base, which is a single-contact base with a 15mm collar and a single locating pin, distinguishing it from dual-contact bayonet variants.
At 13W, the 97 bulb draws considerably more power than the 3.78W 194 used at the front, reflecting a functional difference between the two marker positions.
The 97 bulb is described as a variant of the 1156, meaning the two share a similar single-filament design and BA15s base, though they are not rated identically and are not confirmed interchangeable within these specifications.
Both the 194 and 97 bulbs operate on a 12V system and meet ANSI standards applicable to the United States and Canada.