Toyota MR2 front turn signal bulbs use 1157 size while rear turn signal bulbs use 1156 size. The replacement chart covers 1985 to 1995 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota MR2 uses two distinct bulb types across its turn signal positions: the 1157 for the front and the 1156 for the rear, a split that holds consistent across the 1985-1995 model years covered in the specifications.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output rating, meaning it carries one filament for the higher-intensity turn signal function and a second for a lower-intensity running or parking light function.
The 1156 is a single-filament bulb operating at 12V at 21W, dedicated solely to one lighting function, which aligns with its placement in the rear turn signal position.
Both the 1157 and 1156 conform to ANSI standards applicable in the United States and Canada, indicating a standardized sizing and performance classification shared across many vehicle applications.
The 1157 uses a BAY15d bayonet base, while the 1156 uses a BA15s bayonet base. Although both are bayonet-style fittings of similar scale, the pin offset on the BAY15d base is designed to prevent a single-filament 1156 from being seated in a socket intended for the dual-filament 1157.
Because the 1156 and 1157 share a similar physical profile but differ in base configuration and filament count, the two types are not interchangeable despite their outward resemblance.
The front turn signal position on the Toyota MR2 requires the 1157 specifically because the dual-filament design supports the combined signaling and parking light roles that a front-facing position typically demands.
The 1990 model year is absent from the specifications, so no bulb size data for that year is reflected in the entries above.