Mitsubishi Montero Sport front turn signal bulbs utilize 7443 and 1156 sizes, while rear turn signal bulbs use 1156 size. The replacement chart covers 1997 through 2004 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 1156 bulb is the most frequently specified type across the Mitsubishi Montero Sport turn signal data, appearing in the front positions for 1997-1999 and in the rear positions across all listed model years from 1997-2004.
The 1156 operates on a single filament at 12V and 21W, using a BA15s bayonet base, which is a single-contact bayonet mount with a 15mm base width.
The 7443 is a dual-filament wedge-type bulb in the T20 form factor, rated at 12V with a 21W main filament and a 5W secondary filament, conforming to ANSI standards applicable in the US and Canada.
The dual-filament design of the 7443 allows it to serve two lighting functions within a single housing, which is why it is suited to front turn signal positions where combined functions are common.
The Mitsubishi Montero Sport (2000-2004) uses the 7443 for the front turn signal, representing a change from the 1156 used in the 1997-1999 model years for that same position.
Because the 7443 uses a wedge base and the 1156 uses a BA15s bayonet base, these two bulb types are not physically interchangeable despite sharing a 21W output on their primary filaments.
Both the 7443 and 1156 are classified under ANSI standards, meaning their specifications are standardized across manufacturers producing bulbs under those designations.
The rear turn signal position on the Montero Sport uses the 1156 uniformly across all listed model years, 1997-2004, with no variation tied to production year changes.