The Ferrari 512 TR front and rear side marker bulbs both utilize a 158 bulb size. The replacement chart covers 1992 to 1994 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ferrari 512 TR uses the 158 bulb for both its front and rear side markers across the 1992-1994 model years.
The 158 is an ANSI-standardized bulb type, meaning its physical and electrical specifications conform to a defined North American standard used in the United States and Canada.
The 158 bulb is a miniature wedge type, classified under the T10 form factor. The wedge base design means the bulb is held in place by the socket walls rather than by a bayonet or screw mechanism.
The 158 operates at 12 volts and draws 3 watts, placing it among the lower-wattage bulbs used in automotive lighting applications. This output is consistent with the low-intensity requirements of side marker functions.
The identical bulb specification across both the front and rear side marker positions means a single bulb type serves all four side marker sockets on the Ferrari 512 TR.