Lamborghini Jalpa front and rear turn signal bulbs utilize a P21W size across both positions. The replacement chart covers vehicle production spanning 1982 to 1988.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lamborghini Jalpa uses the P21W bulb type across all listed model years (1982-1988) for both front and rear turn signals.
The P21W is an ECE-standard single-filament bulb, meaning it serves one dedicated function rather than sharing a filament with another lighting circuit such as braking or running lights.
P21W bulbs operate at 12 volts and 21 watts, which places them in the standard range for turn signal applications in European-market vehicles.
The P21W uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin offset to one side, which prevents incorrect installation of a dual-contact variant.
The BA15s base is not interchangeable with the BA15d base, as the latter carries two contact pins and is designed for dual-filament bulbs.
The P21W designation follows ECE (Economic Commission for Europe) standardization, reflecting the Jalpa's European engineering origins and its use of internationally recognized lighting components.
The uniform specification across both the front and rear positions on the Lamborghini Jalpa means a single bulb type covers all four turn signal positions on the vehicle.