The Land Rover Discovery Sport turn signal requires a bulb size of 7444NA for the lighting system. Data for the specified component covers the range of 2017 to 2017.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Land Rover Discovery Sport front turn signal uses two distinct bulb types across its model years: the 7444NA for the 2019 model year and the 12188 for the 2015-2018 model years.
The 7444NA is an ANSI-standardized dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W main filament and a 5W secondary filament. Its natural amber glass produces the required turn signal color without relying on a tinted lens or housing.
The 12188 is a Philips part number designating a 12V halogen bulb intended for specialty automotive applications. It is not interchangeable with the 7444NA, as the two bulbs serve different model years and carry different electrical and physical specifications.
The rear turn signal of the Discovery Sport uses two alternating bulb types across its model years, with no single bulb serving all five years. The PY21W appears in the 2016 and 2019 model years, while the 12496 appears in the 2015, 2017, and 2018 model years.
The PY21W follows the ECE standard used in European and international markets. It is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s offset bayonet base. The offset pin configuration of the BAU15s base prevents installation of non-amber bulbs sharing the similar BA15s base, serving as a physical interchangeability safeguard.
The 12496 is a Philips and Osram part number for a 12V halogen bulb in a specialty application category. It is not a direct substitute for the PY21W despite both serving the rear turn signal position, as they differ in base type and standardization origin.
The rear turn signal position of the Discovery Sport does not use a consistent bulb type across consecutive model years, meaning the 2015, 2016, 2017, 2018, and 2019 model years require individual verification before a replacement bulb is selected.
The front turn signal position also reflects a bulb change between the 2018 and 2019 model years, with the 2019 model requiring the 7444NA rather than the 12188 used in the four preceding years.