Suzuki Motorcycle TU250X front and rear turn signal bulbs utilize a P21W size across all applications. The replacement chart covers 2009 to 2019 production years 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 P21W is the sole turn signal bulb type specified for the Suzuki Motorcycle TU250X across all listed model years, covering both front and rear positions.
The P21W operates at 12 volts and 21 watts, which is the standard wattage for single-filament automotive and motorcycle signalling applications under the ECE regulatory framework.
As a single-filament bulb, the P21W serves only one lighting function per socket, distinguishing it from dual-filament types that combine stop and tail functions within a single unit.
The P21W uses a BA15s bayonet base, where "BA15" denotes a 15mm bayonet cap and "s" indicates a single contact at the base, as opposed to the dual-contact BA15d variant.
The P21W conforms to ECE standards, reflecting its origin and primary use in European and worldwide markets rather than SAE-governed North American specifications.
The TU250X uses the same P21W specification for both the front and rear turn signals across the 2009 and 2012-2019 model years, meaning both positions share full bulb interchangeability with one another.
Because the BA15s base is a single-contact design, it is not physically interchangeable with BA15d sockets, and substitution between these two base types is not possible without socket modification.