Suzuki Motorcycle LT-F250 Ozark Brake Bulb Size

Additional Notes

• The Suzuki Motorcycle LT-F250 Ozark uses the P21/5W bulb across all listed model years from 2002-2014 for its brake light application, with no variation in bulb type across that span.
• The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The higher 21W filament serves the brake or turn signal function, while the lower 5W filament handles a secondary role such as a running or tail light.
• The P21/5W operates on a 12V electrical system, which is standard for small-displacement powersport vehicles.
• This bulb uses a BAY15d bayonet base. The BAY15d designation indicates an offset pin configuration, where the two pins are positioned at different heights on the base. This offset is a deliberate fitment control that prevents a single-filament bulb with a symmetrical base from being inserted in its place.
• The P21/5W is governed by ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets. This regulatory classification defines its output, base type, and labeling requirements.
• Because the BAY15d base is keyed by its asymmetrical pin placement, substituting a visually similar bulb with a BAY15s base (single-filament, symmetrical pins) would result in an incorrect fitment for the LT-F250 Ozark brake light socket.