BMW Motorcycle F650ST front turn signal bulbs measure 5008 and 232 sizes, while rear turn signal bulbs measure 5008 size. The replacement chart covers 1997 to 1999 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 5008 is the most frequently specified bulb across the BMW Motorcycle F650ST turn signal positions, appearing in both front and rear applications for the 1998-1999 model years.
The 5008 operates on a 12-volt system and uses a BA15s single-contact bayonet base, which is a single-filament configuration.
The 5008 is classified as a lower wattage variant of the 1156 bulb, meaning the two share the same BA15s base type but are not rated at identical wattage levels and are not interchangeable without accounting for that difference.
The 1997 BMW Motorcycle F650ST front turn signal takes a 232 bulb rather than the 5008 used in later model years, making the front signal fitment year-specific for that position.
The 232 is a festoon-type bulb with an SV8.5 base, a form factor that is physically distinct from the BA15s bayonet base of the 5008 and therefore not interchangeable with it.
The 232 bulb is rated at 12 volts and 3 watts, placing it in a low-output category consistent with small indicator or auxiliary lighting roles.
The rear turn signal position on the F650ST uses the 5008 across all three listed model years, 1997-1999, without variation.
Both the 5008 and 232 are ANSI-standardized bulbs recognized in the US and Canadian markets, meaning their specifications conform to defined industry standards rather than proprietary ratings.