The Toyota Echo tail light requires a 7443 bulb size for proper illumination and function. Data for the specific component covers the period from 2000 through 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Echo uses the 7443 bulb for the outer tail light position across all listed model years, 2000-2005.
The 7443 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared by all compliant manufacturers.
The 7443 is a dual-filament bulb, which means a single unit serves two lighting functions within one housing, typically combining a brighter stop light output with a dimmer running light output.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
Its two filaments are rated at 21 watts and 5 watts respectively, with the higher-wattage filament producing the brighter stop light signal and the lower-wattage filament handling the tail light function.
The 7443 uses a T20 wedge base, a physical connector type that seats by friction rather than by a twist-lock mechanism, which distinguishes it from bayonet-style bases used in other automotive bulb families.
The single-filament variant of this bulb family, the 7440, shares the same T20 wedge base but is not a direct substitute for the 7443 in dual-filament applications, as it lacks the second filament required for combined stop and tail functions.