Honda Motorcycle CBR954RR front turn signal bulb size measures 1034 while rear turn signal bulb size measures P21W. The replacement chart covers 2002 to 2003 production 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.
The Honda Motorcycle CBR954RR uses two distinct bulb standards across its front and rear turn signal positions for the 2002-2003 model years.
The 1034 bulb is an ANSI-standard type used in North American markets, operating at 12V with a dual-filament configuration rated at 21/5W and fitted with a BAY15d bayonet base.
The dual-filament design of the 1034 means it serves two electrical functions within a single housing, with the higher-wattage filament typically handling turn signal output and the lower-wattage filament handling a secondary function such as running or parking light duty.
The 1034 is a variant of the widely used 1157 bulb, sharing its BAY15d base type, though the two are not necessarily interchangeable due to potential differences in wattage or filament positioning.
The P21W bulb follows the ECE standard, which governs lighting regulations across Europe and many other markets worldwide, and it operates at 12V with a single filament rated at 21W.
Unlike the 1034, the P21W uses a BA15s bayonet base, which is a single-contact fitting. This base type is not compatible with the BAY15d base of the 1034, making the front and rear turn signal bulbs non-interchangeable on the CBR954RR.
The rear turn signal position on the CBR954RR uses the P21W for the 2002-2003 model years, while the front position uses the 1034, indicating that the two positions were designed around different regional lighting standards within the same vehicle.