Mitsubishi Tredia front and rear turn signal bulbs utilize a 1156 size across both positions. The replacement chart covers vehicle production spanning 1983 to 1988.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 bulb is the sole turn signal bulb type specified for the Mitsubishi Tredia across all listed model years.
The 1156 is an ANSI-standard bulb recognized in both the United States and Canada, meaning it conforms to a widely adopted North American lighting specification.
It is a single-filament bulb, which distinguishes it from dual-filament types such as the 1157. A single-filament design serves one lighting function only, making it suited to dedicated turn signal applications.
The 1156 uses a BA15s bayonet base. The BA15s designation indicates a 15mm bayonet cap with a single contact pin, a base style that requires a quarter-turn to lock into its socket.
The bulb operates at 12 volts and draws 21 watts, values consistent with standard automotive electrical systems of that era.
The Mitsubishi Tredia (1983-1988) uses the 1156 for both the front and rear turn signal positions, meaning the same bulb type serves all four turn signal housings on the vehicle.
Because the front and rear positions share the same specification, a single replacement bulb type covers all turn signal sockets on the Tredia without position-specific substitutions.
The BA15s base is not interchangeable with the BA15d base, which carries two offset pins. Substituting a BA15d bulb into a BA15s socket is not possible without modification.
The 1156 should not be confused with the 1157, despite their similar appearance. The 1157 carries a dual-filament design and a BAY15d base with two pins at different heights, making it physically and electrically incompatible with a BA15s socket.