Suzuki Motorcycle DR-Z400S Tail Light Bulb Size

The Suzuki Motorcycle DR-Z400S tail light utilizes a P21/5W bulb size for the rear illumination system. Available data for the specified component covers the range from 2000 to 2019.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2011-2019	P21/5W
2000-2009	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

Other Locations

Additional Notes

The Suzuki Motorcycle DR-Z400S uses the P21/5W bulb for its tail light across all listed model years from 2000-2019.
The P21/5W is a dual-filament bulb, with the 21W filament serving the brake light function and the 5W filament serving the running light function within a single housing.
This bulb operates on a 12V electrical system, which is standard for motorcycles in this category.
The P21/5W uses a BAY15d bayonet base, an offset twin-pin fitting designed to prevent incorrect installation by ensuring the bulb can only be seated in one orientation.
The P21/5W is an ECE-rated bulb, meaning it conforms to the Economic Commission for Europe lighting standard recognized across European and many worldwide markets.
Because the BAY15d base is offset, it is not interchangeable with the BA15d base, which shares a similar appearance but has symmetrically placed pins.