The Isuzu Oasis uses a 2057 bulb size for front side marker applications and a 7443 bulb size for rear side marker applications. The replacement chart covers vehicle production spanning 1996 to 1999 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 Isuzu Oasis uses the 2057 bulb for the front side marker position across all documented model years, spanning 1996-1999.
The 2057 is a dual-filament bulb operating at 12V with a high/low wattage rating of 26.9W and 8W respectively, mounted via a BAY15d bayonet base.
The 2057 is an ANSI-standardized type recognized in both the United States and Canada, and it is a brighter variant of the more widely known 1157 bulb.
The BAY15d bayonet base of the 2057 features two offset pins, which physically prevents incorrect installation of single-filament bulbs in the same socket.
The rear side marker position on the Isuzu Oasis calls for the 7443 bulb across all documented model years, spanning 1996-1999.
The 7443 is a dual-filament T20 wedge bulb operating at 12V with filament ratings of 21W and 5W, and it also conforms to ANSI standards for the US and Canadian markets.
The front and rear side marker positions on the Oasis use different bulb types, the 2057 and 7443 respectively, meaning the two are not interchangeable despite both being dual-filament 12V bulbs.
The 2057 and 7443 differ in base type, the former using a bayonet fitting and the latter a wedge fitting, which makes cross-position substitution physically incompatible.