The Acura TLX back up light utilizes a 7440 bulb size for illumination purposes within the rear housing assembly. Data for the specific component covers the range from 2015 through 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Acura TLX uses the 7440 bulb for its back up light across the 2015-2020 model years.
The 7440 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 7440 belongs to the T20 wedge bulb family, a designation that refers to its wedge-style base, which seats directly into a socket without requiring a separate bayonet or pin-type connector.
The bulb operates at 12 volts and draws 21 watts, which is consistent with standard automotive reverse light applications.
The 7440 is a single-filament bulb, meaning it serves only one lighting function per unit, as opposed to dual-filament types that can serve two functions such as braking and running light simultaneously.
The 2017-2019 Acura TLX also carries a separate Outer Back Up Light position, which likewise specifies the 7440 bulb.
Because both the standard back up light and the outer back up light positions on applicable model years share the same 7440 specification, the same bulb type is used across both positions on those vehicles.