Dodge Lancer Map Light Bulb Size

The Dodge Lancer map light requires bulb sizes 74, 90, 906, and 1004 depending on the specific version of the vehicle. Data for the lighting components covers the range from 1956 through 1989.

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	74
1986-1988	906
1961-1962	1004
1959	90
1957	90
1956	1004

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Dodge Lancer map light specifications span two distinct production eras, covering select model years from 1956 through 1989.
The bulb 906 is an ANSI-standard miniature wedge type in a T10 form factor, rated at 12V and 8W, and it serves as the map light bulb for the Dodge Lancer across the 1986-1988 model years.
The T10 wedge base of the 906 bulb is a friction-fit design that requires no locking mechanism, relying solely on the socket's tension to hold the bulb in place.
The bulb 1004 is an ANSI-standard dual-filament bulb with a BAY15d bayonet base, rated at 12V and 21/5W, and it is specified for the Dodge Lancer in the 1956, 1961, and 1962 model years.
The 1004 is noted as a variant of the 1157. The BAY15d bayonet base features two offset pins, which prevent incorrect insertion and distinguish it from single-filament bayonet types.
The bulb 90 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and it is the specified map light bulb for the Dodge Lancer in the 1957 and 1959 model years.
The BA15s base of the 90 bulb uses a single-contact design with two side pins positioned symmetrically, making it non-interchangeable with the dual-filament BAY15d base used by the 1004 bulb despite a similar physical profile.
For the 1989 Dodge Lancer, the map light uses the bulb 74, an ANSI-standard T5 miniature wedge type rated at 12V and 1.4W, which is notably lower in wattage than the 906 used in the preceding model years.
The T5 form factor of the 74 bulb is physically smaller than the T10 form factor of the 906, and the two wedge types are not interchangeable despite sharing the same base style.
Across all listed model years, every specified bulb operates at 12V, consistent with the standard automotive electrical system voltage used in passenger vehicles.