Kawasaki KAF620 Mule 4000 Brake Bulb Size

Additional Notes

• The P21/5W is the sole brake bulb type listed across all model years of the Kawasaki KAF620 Mule 4000 covered by these specifications, spanning 2015-2022.
• The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The higher-rated filament operates at 21 watts for the brake or turn signal function, while the lower-rated filament operates at 5 watts for a secondary function such as a tail or parking light.
• This bulb type uses a BAY15d bayonet base. The BAY15d designation indicates an offset pin configuration, where the two pins are positioned at different heights along the base. This offset prevents the bulb from being inserted in the wrong orientation, ensuring the correct filament aligns with the intended circuit.
• The P21/5W operates on a 12-volt electrical system, which is consistent with the standard voltage architecture found in utility vehicles of this type.
• The P21/5W is governed by ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets.
• The BAY15d base is not interchangeable with the similarly named BA15d base. The BA15d features pins at equal heights, and substituting it for a BAY15d fitting risks incorrect filament orientation or a failed connection.