BMW Motorcycle R60/5 front and rear turn signal bulbs utilize a P21W size across all applications. The replacement chart covers 1969 to 1974 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 BMW Motorcycle R60/5 uses the P21W bulb type for both front and rear turn signals across all listed model years, 1969-1974.
The P21W is an ECE-standardized bulb, meaning it conforms to the Economic Commission for Europe regulatory framework governing lighting equipment used in Europe and internationally.
The P21W operates at 12 volts and 21 watts, which is the standard wattage for single-filament turn signal applications in motorcycles and automobiles following ECE conventions.
The P21W uses a BA15s bayonet base, where "BA" denotes a bayonet-style fitting, "15" refers to the 15mm base width, and the lowercase "s" indicates a single-contact configuration.
As a single-filament bulb, the P21W is dedicated to one lighting function per socket, distinguishing it from dual-filament variants such as the P21/5W, which serves two functions simultaneously.
The front and rear turn signal positions on the BMW Motorcycle R60/5 share the same P21W specification, meaning the same bulb type is physically interchangeable between both positions on the motorcycle.
The BA15s bayonet base features offset locating pins, which prevent incorrect insertion of bulbs with incompatible base configurations such as the BA15d, a visually similar but dual-contact variant.