Toyota Mark II Tail Light Bulb Size

The Toyota Mark II tail light utilizes a 1157 bulb size for the rear lighting assembly. Data for the specified component covers the range from 1972 to 1976.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
1972-1976	1157	P21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price

Other Locations

Additional Notes

The 1157 is the sole tail light bulb type listed for the Toyota Mark II across the 1972-1976 model years.
The 1157 is an ANSI-standardized bulb, meaning its physical and electrical specifications conform to a defined North American standard used in the United States and Canada.
The 1157 operates on a 12-volt electrical system, which is the standard automotive voltage for this era of vehicle production.
As a dual-filament bulb, the 1157 contains two separate filaments within a single envelope, allowing it to serve two distinct lighting functions from one unit, typically stop and tail functions simultaneously.
The two filaments in the 1157 are rated at 21 watts and 5 watts respectively, with the higher-wattage filament producing the brighter stop light output and the lower-wattage filament handling the continuous tail light function.
The 1157 uses a BAY15d bayonet base, which is an offset twin-pin mount. The asymmetric pin placement of the BAY15d base prevents incorrect installation, ensuring the higher and lower wattage filaments are always connected to their correct circuits.
Because the BAY15d base is keyed by offset pins, substitution with visually similar bayonet-base bulbs that do not share this offset configuration would result in incorrect filament-to-circuit alignment.