BMW Motorcycle K1300S front turn signal bulbs measure 921 in size, while rear turn signal bulbs measure 232 and 5008. The replacement chart covers vehicle production spanning 2009 to 2016.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The BMW Motorcycle K1300S uses the 921 bulb across all front turn signal positions for model years 2009-2016, making it the sole front turn signal bulb type in these specifications.
The 921 is a T15 wedge-style bulb rated at 12V and 16W, conforming to ANSI standards for the US and Canadian markets. Its wedge base requires no separate socket hardware, as the base itself forms the electrical contact.
The rear turn signal position on the K1300S alternates between two bulb types across the listed model years, specifically the 232 and the 5008, meaning the two types are not interchangeable without verifying the exact model year.
The 232 bulb is a festoon-style unit with an SV8.5 base, rated at 12V and 3W. Festoon bulbs are cylindrical and make contact at both ends rather than through a base socket, which is a physically distinct mounting method from both wedge and bayonet designs.
The 5008 bulb uses a BA15s single-contact bayonet base and operates at 12V. It is described as a lower-wattage variant of the 1156 bulb, sharing the same base type but drawing less power.
Because the 5008 and 232 use fundamentally different base types, a bayonet socket and a festoon socket are not physically compatible, and substituting one bulb for the other in a given year's rear turn signal housing is not supported by these specifications.
The rear turn signal on the K1300S uses the 232 festoon bulb for model years 2009, 2012-2013, and 2015-2016, while the 5008 bayonet bulb is specified for 2010-2011 and 2014.
The 921 front turn signal bulb operates at 16W, which is notably higher than the 3W rating of the 232 rear turn signal bulb, reflecting the differing luminous output requirements between front signaling and rear indicator functions on this motorcycle.
All three bulb types listed in these specifications, the 921, 232, and 5008, conform to ANSI standards applicable to the US and Canadian markets.
The front and rear turn signal positions on the K1300S require different bulb types in every listed model year, as the 921 wedge bulb specified for the front is not referenced in any rear turn signal position within these specifications.