Ford Aerostar Luggage Compartment Bulb Size

The Ford Aerostar luggage compartment utilizes bulb sizes 906, 912, and 105 depending on the specific production version. Available data for the specified components covers the range from 1987 to 1997.

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
1993-1997	906
1991-1992	912
1987-1990	105

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	105

Other Locations

Additional Notes

The Ford Aerostar luggage compartment used three distinct bulb types across its 1987-1997 production span: the 906, 912, and 105, each belonging to a different bulb family with its own base type and wattage rating.
The 906 is a T10 miniature wedge bulb rated at 12V and 8W. It is the lowest-wattage of the three types used in the Aerostar's luggage compartment and was fitted across the 1993-1997 model years.
The 912 is a T15 wedge bulb rated at 12V and 12W. It is a variant of the 921 bulb, meaning it shares the same base type but differs in wattage output. The 912 was fitted in the 1991-1992 model years.
The 105 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. It is a variant of the 1156 bulb and was fitted in the 1987-1990 model years.
All three bulb types are ANSI standards recognized in both the United States and Canada, indicating they conform to a shared North American specification framework.
The 906 and 912 are both wedge-base bulbs, but they are not interchangeable. The T10 and T15 designations refer to different tube widths, and their wattage ratings differ by 4W, which affects socket fit and electrical load.
The 105 uses a BA15s bayonet base, which is physically incompatible with the wedge sockets required by the 906 and 912. Substituting across these base types is not possible without modifying the socket.
Because the 912 is a variant of the 921, some sources list them as interchangeable, though the wattage difference between variants should be confirmed against the vehicle's socket rating before substitution.
Similarly, the 105 is a variant of the 1156, and the two share the BA15s bayonet base. However, wattage differences between variants in this family can affect compatibility, and the specific rating of the 105 at 13W is the value listed for the Aerostar's luggage compartment application.
The luggage compartment bulb specification changed twice across the Aerostar's production run, shifting from the 105 to the 912 after 1990, and then from the 912 to the 906 after 1992, with each transition involving a different base type or bulb family.