Honda Motorcycle CBR600RR front turn signal bulbs measure P21/5W or 1034 in size, while rear turn signal bulbs measure P21W or 1073 in size. The replacement chart covers 2003 to 2020 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.
The Honda Motorcycle CBR600RR front turn signal uses the P21/5W bulb across the 2009-2020 model years, and the 1034 bulb across the 2003-2008 model years.
The P21/5W is a dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, built to the ECE standard used in Europe and worldwide markets. It uses a BAY15d bayonet base, which features two offset pins to prevent incorrect installation.
The 1034 is an ANSI-standard dual-filament bulb also rated at 12V and 21/5W, sharing the BAY15d bayonet base with the P21/5W. It is a variant of the widely known 1157 bulb and follows the US and Canadian standardization system.
Although the P21/5W and 1034 share the same BAY15d base type and similar wattage ratings, they are governed by different regional standards, ECE and ANSI respectively, and direct interchangeability should not be assumed without confirming physical and electrical compatibility.
The CBR600RR rear turn signal uses the P21W bulb across the 2003-2007 and 2009-2020 model years.
The P21W is a single-filament bulb rated at 12V and 21W, built to the ECE standard. It uses a BA15s bayonet base, which has a single pin and is not physically compatible with the dual-pin BAY15d base used by the P21/5W and 1034.
The 2008 CBR600RR rear turn signal uses the 1073 bulb, which is an ANSI-standard single-filament bulb rated at 12V and 13W with a BA15s bayonet base. It is a lower-wattage variant of the 1156 bulb.
The 1073 and P21W both use the BA15s base, but they differ in wattage: the 1073 is rated at 13W while the P21W is rated at 21W. This wattage difference means the two bulbs are not direct equivalents, and substituting one for the other may affect turn signal flash rate or brightness.
The front and rear turn signals on the CBR600RR use different base types across the specification range. The front positions use BAY15d dual-pin bases, while the rear positions use BA15s single-pin bases, making the front and rear bulbs mutually incompatible by design.
The shift from ANSI-standard bulbs (1034 and 1073) to ECE-standard bulbs (P21/5W and P21W) in the front and rear positions occurred between the 2008 and 2009 model years on the Honda Motorcycle CBR600RR.