The Daewoo Lanos front side marker uses a 168 bulb size while the rear side marker requires a P21/5W bulb size. The replacement chart covers vehicle production years spanning 1999 to 2002 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Daewoo Lanos uses two distinct bulb types across its front and rear side marker positions, with the 168 assigned to the front and the P21/5W assigned to the rear for the 1999-2002 model years.
The 168 bulb follows the ANSI standard, which governs bulb specifications in the United States and Canada, and is a miniature wedge type built on a T10 form factor operating at 12V and 4.9W.
The T10 wedge base on the 168 bulb connects by friction fit rather than a bayonet or screw mechanism, meaning the bulb is held in place by the socket walls alone.
The P21/5W bulb follows the ECE standard, which is the regulatory framework used across Europe and much of the rest of the world, and it carries a BAY15d bayonet base with dual filaments rated at 21W and 5W on a 12V circuit.
The BAY15d base on the P21/5W is an offset twin-pin bayonet fitting, where the two pins are positioned at different heights to prevent incorrect installation of the bulb.
The dual-filament design of the P21/5W means the rear side marker position on the Lanos is capable of operating at two separate wattage levels, which is a characteristic associated with combined stop and tail light functions in many applications.
The 168 and P21/5W bulbs are not interchangeable, as they differ in base type, wattage, filament count, and regulatory standard, making each one specific to its designated socket on the vehicle.
The front and rear side marker positions on the Lanos therefore require separate bulb purchases, as no single bulb type satisfies both socket specifications.