Kubota RTV1140CPX Turn Signal Bulb Size

The Kubota RTV1140CPX rear turn signal requires a P21/5W bulb size for proper operation. Replacement bulb specifications are documented in the chart covering 2015 to 2016 production years.

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

Rear Turn Signal

Years	Bulb Size
2015-2016	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 P21/5W is the rear turn signal bulb for the Kubota RTV1140CPX across the 2015-2016 model years.
The P21/5W follows the ECE (Economic Commission for Europe) standard, which is recognized across European and worldwide markets, distinguishing it from SAE-standard bulbs more common in North American automotive applications.
This bulb operates on a dual-filament design, with one filament rated at 21W and a secondary filament rated at 5W, allowing a single bulb to serve two lighting functions simultaneously.
The BAY15d bayonet base features two offset pins at different heights, a physical design that prevents incorrect insertion and ensures the two filaments align with their intended circuits.
The bulb is rated at 12V, consistent with the standard electrical system voltage found in most utility vehicles and light automotive applications.
Because the BAY15d base uses offset pins, it is not interchangeable with the similarly named BA15d base, which uses pins at equal heights, despite the two bases appearing visually similar.