Porsche 924 front and rear side marker bulbs utilize a 3893 bulb size across both locations. The replacement chart covers vehicle production spanning 1977 to 1988.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Porsche 924 uses the 3893 bulb for both front and rear side marker positions across all listed model years, spanning 1977-1982 and 1987-1988.
The 3893 is an ANSI-standardized bulb, meaning its physical and electrical characteristics conform to a defined North American specification recognized in both the United States and Canada.
The 3893 operates at 12 volts, which is consistent with the standard electrical system voltage found in passenger vehicles of this era.
The 3893 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, allowing it to serve more than one lighting function from a single socket.
The 3893 uses a BAY15d bayonet base, a two-pin offset bayonet mount where the two pins are positioned at different heights to ensure the bulb can only be inserted in one orientation, preventing incorrect filament alignment.
The 3893 is classified as a specialty application bulb, indicating it is not among the most broadly distributed automotive bulb types and is intended for specific fitment contexts rather than general-purpose use.
The front and rear side marker positions on the Porsche 924 share an identical bulb specification across all listed years, meaning the same 3893 bulb serves both locations without substitution or variation between positions.