Ford Escape Tail Light Bulb Size

Ford Escape tail light bulb sizes include 7440, 921, and 4157 configurations for the rear lighting assembly. The replacement chart covers vehicle production spanning 2001 to 2020.

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
2020	7440
2018	921
2006-2012	4157
2001-2005	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	4157
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

Other Locations

Additional Notes

The 4157 is the most frequently specified tail light bulb for the Ford Escape, covering model years 2006-2012.
The 3157 bulb was used across the 2001-2005 model years, making it the second most recurring specification in this dataset.
Both the 4157 and 3157 are dual-filament T25 wedge bulbs rated at 12V with a 27W/7W output, where the higher wattage filament serves the brake or turn function and the lower wattage filament serves the running light function.
Despite sharing the same T25 form factor and identical wattage ratings, the 4157 and 3157 are not interchangeable. The two bulbs differ in their base configuration, and substituting one for the other risks improper fitment or electrical incompatibility.
The 2020 Ford Escape uses the 7440, a single-filament T20 wedge bulb rated at 12V and 21W. Because it has only one filament, it serves a single lighting function rather than a combined brake-and-running-light role.
The 2018 Ford Escape uses the 921, a T15 wedge bulb rated at 12V and 16W. At 16W, it draws less power than the 7440 and the dual-filament bulbs used in earlier model years.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating a standardized electrical and physical classification system governs each part number.
The T15, T20, and T25 designations refer to the bulb's tubular body size, with T15 being the smallest and T25 the largest among those listed. These size differences mean the bulbs are physically distinct and not cross-compatible across different socket types.
The shift from dual-filament bulbs (3157 and 4157) in the 2001-2012 range to single-filament bulbs (921 and 7440) in 2018 and 2020 reflects a change in tail light assembly design across generations of the Ford Escape.