Maserati 228i Back Up Light Bulb Size

The Maserati 228i back up light requires a bulb size of 1156 for proper installation and function. Data for the specific component covers the range from 1989 to 1990.

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	Bulb Size
1989-1990	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

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Additional Notes

The 1156 is the sole bulb type listed for the Maserati 228i backup light across both model years covered in the specifications, spanning 1989-1990.
The 1156 operates on a 12-volt electrical system and draws 21 watts, placing it in the standard range for single-circuit automotive lighting applications.
As a single-filament bulb, the 1156 serves one dedicated function per socket, which aligns with its application in backup lighting where only one consistent output level is required.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin offset to one side, ensuring the bulb seats in only one rotational position.
The 1156 carries ANSI standardization recognized in both the United States and Canada, meaning the bulb conforms to a defined set of dimensional and electrical tolerances shared across manufacturers.
Because the BA15s base is a single-contact design, it is not interchangeable with the BA15d base, which carries two contacts and is found on dual-filament bulbs such as the 1157. Substituting one for the other is not possible without socket modification.