Harley-Davidson XL1200C Sportster 1200 Custom Turn Signal Bulb Size

Harley-Davidson XL1200C Sportster 1200 Custom rear turn signal bulbs use a P21W size, designated as 199 bulb type. The replacement chart covers 2005 through 2019 model years with corresponding bulb size specifications.

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
2010-2019	P21W
2009	199
2005-2008	P21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The rear turn signal position on the Harley-Davidson XL1200C Sportster 1200 Custom is served by two bulb types across the 2005-2019 model range: the P21W and the 199.
The P21W is an ECE-standard single-filament signalling bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and used in European and worldwide automotive applications.
The 199 is an ANSI-standard single-filament bulb also rated at 12V and 21W with a BA15s bayonet base, and it is a variant of the widely used 1156 bulb type, common in North American applications.
Despite originating from different standardization systems, both the P21W and the 199 share identical voltage, wattage, and base type, which reflects their functional equivalence in single-filament signalling roles.
The P21W is specified for the rear turn signal across the 2005-2008 and 2010-2019 model years, making it the predominant bulb type for this position on the XL1200C Sportster 1200 Custom.
The 2009 model year is the sole instance where the 199 is specified for the rear turn signal, distinguishing it from all other years in the listed range.
The shared BA15s bayonet base between the P21W and the 199 means the two types are physically interchangeable at the socket level, though regional certification standards differ between them.