Harley-Davidson XL1200L Sportster 1200 Low Turn Signal Bulb Size

Harley-Davidson XL1200L Sportster 1200 Low rear turn signal bulb uses a P21W size, designated as 199. The replacement chart covers 2006 to 2011 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
2010-2011	P21W
2009	199
2006-2008	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 P21W and 199 bulbs share identical electrical ratings of 12V and 21W, and both use a BA15s single-contact bayonet base, making them physically and electrically equivalent in those respects.
The P21W follows the ECE standard used in Europe and worldwide markets, while the 199 follows the ANSI standard used in North America, reflecting different regional certification systems for the same functional bulb type.
The 199 bulb is a variant of the 1156, a widely used single-filament automotive signalling bulb, which means it shares the same base and general construction as that common type.
The BA15s bayonet base found on both bulb types is a single-contact design, distinguishing it from the BA15d dual-contact bayonet base used on dual-filament bulbs.
The Harley-Davidson XL1200L Sportster 1200 Low uses the P21W for the rear turn signal across the 2006-2008 and 2010-2011 model years.
The 2009 model year specifies the 199 bulb for the rear turn signal, which represents a deviation from the P21W fitment used in surrounding years.
Because the P21W and 199 are governed by different regional standards despite their shared base type, substitution between them warrants verification of compliance with applicable regional regulations before use.