Suzuki Vitara front turn signal bulbs use PY21W, 12496, or 1156 size, while rear turn signal bulbs use 7440 or 7443 size. The replacement chart covers 1999 to 2004 model 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 Suzuki Vitara front turn signal uses three distinct bulb types across the 1999-2004 model years: the 1156, PY21W, and 12496, none of which are interchangeable due to differences in base type and electrical specification.
The PY21W is an ECE-standard amber single-filament bulb rated at 12V and 21W, fitted with a BAU15s offset bayonet base. The offset pin position of the BAU15s base physically prevents installation of non-amber bulbs, enforcing amber light output by design.
The 1156 is an ANSI-standard single-filament bulb rated at 12V and 21W, using a BA15s bayonet base. Although its wattage matches the PY21W, the BA15s base has symmetrical pins, making it mechanically incompatible with PY21W sockets.
The 12496 is a Philips/Osram part number designation for a 12V halogen bulb used in the Suzuki Vitara (2002-2003) front turn signal position.
The Suzuki Vitara front turn signal for 2004 and 2001 takes the PY21W, while 1999-2000 models take the 1156, and 2002-2003 models take the 12496.
The rear turn signal across the 1999-2004 Vitara range uses only two bulb types: the 7440 and the 7443, both of which are T20 wedge-base bulbs rated at 12V.
The 7440 and 7443 share the same T20 wedge base form factor, but the 7443 carries a dual filament rated at 21W and 5W, whereas the 7440 is a single-filament bulb rated at 21W. This filament difference means the two are not functionally interchangeable in all applications.
The Suzuki Vitara rear turn signal for 1999-2000 and 2004 uses the single-filament 7440, while 2001-2003 models use the dual-filament 7443.
The dual-filament 7443 in the 2001-2003 rear turn signal position suggests those model years may share that socket with a secondary lighting function, such as a parking or tail light, which utilizes the lower 5W filament.
Substituting a 7440 in place of a 7443 in a dual-filament socket would leave the secondary 5W circuit without a functioning filament, resulting in a non-operational secondary light function.