The Lamborghini Murcielago brake light utilizes a P21/5W bulb size for illumination across all recorded vehicle versions. Data for the specified component covers the period from 2001 to 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lamborghini Murcielago uses the P21/5W bulb type across its brake lighting for the 2001-2006 model years, as well as the inner brake position on the 2007-2010 model years.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, mounted on a BAY15d bayonet base.
The BAY15d base features offset pins, which physically prevents the bulb from being inserted in the wrong orientation, ensuring the correct filament is assigned to each circuit.
The 2007-2010 Murcielago outer brake position uses the P21W bulb, which differs from the P21/5W used in the inner brake position of the same years.
The P21W is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base, making it electrically and physically incompatible with the dual-filament P21/5W.
The BA15s base used by the P21W and the BAY15d base used by the P21/5W are not interchangeable, as the pin alignment and offset differ between the two base types.
Both the P21/5W and P21W conform to ECE standards, indicating they are approved for road use across Europe and other markets that recognize ECE regulations.
The split between inner and outer brake bulb types on the 2007-2010 Murcielago means the two positions require separate bulb specifications despite both serving brake lighting functions.