Ford Escort Map Light Bulb Size

Additional Notes

• The Ford Escort map light uses four distinct bulb sizes across its model years: 168, 906, 1816, and 67.
• The 168 bulb is the most consistently specified type, covering the Ford Escort from 1997-2003. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
• The 906 bulb shares the same T10 wedge form factor as the 168 but draws 8W, making it a higher-wattage alternative. It appears in the 1981, 1988, and 1990 model years.
• Although the 168 and 906 bulbs share the T10 wedge base, their wattage ratings differ by more than 3W. Substituting one for the other without confirming socket compatibility may affect circuit load.
• The 1816 bulb is an ANSI-standard miniature wedge type in the T3.25 form factor, rated at 12V and 4W. It is specified for the Escort across 1982-1985, 1987, and 1989.
• The T3.25 form factor of the 1816 is physically narrower than the T10 used by the 168 and 906. These two wedge families are not interchangeable despite sharing a wedge-style base.
• The 67 bulb, specified for the 1956-1957 Ford Escort, uses a BA15s single-contact bayonet base rather than a wedge-style fitting. This base type is mechanically distinct from all other bulb types listed in these specifications.
• The 67 bulb is described as a lower-wattage variant of the 1156. Both share the BA15s bayonet base, but the 67 is rated at 8W while the 1156 is a higher-wattage bulb, meaning the two are not direct substitutes.
• All four bulb types in these specifications conform to ANSI standards applicable in the US and Canada, and all are rated at 12V, consistent with standard automotive electrical systems.
• The 1816 and 168 are both low-wattage bulbs at 4W and 4.9W respectively, while the 906 and 67 each draw 8W, placing them in a higher draw category among the map light bulbs listed for this vehicle.