Mitsubishi Montero front and rear turn signal bulbs utilize 7440NA, 1157, 1156, and 7440 sizes depending on location and model generation. The replacement chart covers 1983 through 2006 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 Mitsubishi Montero turn signal specifications cover model years 1983 through 2006, spanning front and rear positions across three distinct bulb types: the 1156, 1157, and 7440/7440NA.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, distinguished from the standard 7440 by its natural amber glass envelope, which produces a colored output without relying on a clear lens or amber-tinted housing.
The 7440 and 7440NA share the same T20 wedge base and 12V/21W electrical rating, but the amber glass coating on the 7440NA makes the two non-interchangeable in applications where lens color determines the signal's amber output.
On the Mitsubishi Montero, the front turn signal uses the 7440NA for 2001-2006, while the rear turn signal uses the 7440NA only for 2003-2006, with the standard 7440 specified for the rear in 2001-2002.
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, making it suitable for combined turn signal and parking light functions within a single housing.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W. Although the 1156 and 1157 share a visually similar bayonet-style base, their pin offsets differ, and the two types are not interchangeable.
For the front turn signal position, the 1157 is specified for 1992-2000, while the 1156 covers 1983-1991, reflecting a base-type change at that model year boundary.
The rear turn signal position shows the inverse pattern: the 1156 is specified for 1992-2000, and the 1157 covers 1983-1991, meaning the front and rear positions swapped between the 1156 and 1157 relative to each other across that same boundary.
All bulb types listed across these specifications conform to ANSI standards applicable in the United States and Canada, indicating standardized sizing and electrical ratings across the range.
Because the 1156 and 1157 use mechanically incompatible bayonet bases despite their similar appearance, substituting one for the other in any listed position would result in an improper fit.