The Triumph Bonneville SE uses 5008 and 232 bulb sizes for both front and rear turn signal applications. A replacement chart documents bulb size specifications across the 2009 to 2013 production range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 5008 is a single-filament bulb with a BA15s bayonet base, rated at 12V. It is a lower wattage variant of the 1156 and conforms to ANSI standards for the US and Canadian markets.
The 232 is a festoon-style bulb with an SV8.5 base, rated at 12V and 3W. It also conforms to ANSI standards for the US and Canadian markets. The festoon form factor differs structurally from the bayonet-base 5008, making the two types non-interchangeable.
The Triumph Bonneville SE uses both the 5008 and 232 bulb types across its front and rear turn signal positions, depending on the model year. These two bulb types are not cross-compatible due to their different base designs and physical forms.
For the 2011 Bonneville SE, both the front and rear turn signals use the 232 festoon bulb, making it the only year in the range where all four turn signal positions share a single bulb type.
The 2010 Bonneville SE uses different bulb types between its front and rear turn signals. The front position takes the 5008, while the rear position takes the 232. This split fitment requires attention when sourcing replacements to avoid installing an incorrect bulb type.
For the 2009 and 2012-2013 model years, both front and rear turn signal positions use the 5008 bulb, standardizing the fitment across all four positions in those years.