BMW Motorcycle R65LS front and rear turn signal bulbs utilize a P21W size across all applications. The replacement chart covers 1981 to 1985 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 R65LS uses the P21W bulb type for both its front and rear turn signals across the 1981-1985 model years.
The P21W is a single-filament bulb, meaning it serves one lighting function only, which is consistent with its dedicated turn signal role on the R65LS.
P21W bulbs operate at 12 volts and 21 watts, placing them in the standard range for automotive turn signal applications.
The P21W uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. This base type is not interchangeable with dual-contact BA15d variants.
The P21W designation follows ECE (Economic Commission for Europe) standards, indicating the bulb meets internationally recognized performance and safety regulations used across Europe and many other markets worldwide.
The front and rear turn signal positions on the R65LS share the same P21W specification, so a single bulb type covers both locations on the motorcycle.