Honda Crosstour front turn signal bulbs utilize 1157NA and 1034NA sizes, while rear turn signal bulbs use 7440NA size specifications. The replacement chart covers 2012 through 2015 model years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Crosstour front turn signal uses two different bulb sizes across its model years, with the 2012 and 2015 models requiring the 1157NA and the 2013-2014 models requiring the 1034NA.
The 1157NA is a dual-filament bulb rated at 12V with a 21W high filament and a 5W low filament, mounted on a BAY15d bayonet base with natural amber glass.
The 1034NA shares the same BAY15d bayonet base and 12V, 21W/5W dual-filament configuration as the 1157NA and is classified as a variant of that bulb under the ANSI standard.
Although the 1034NA and 1157NA share a base type and wattage rating, they are listed as distinct part numbers and are not interchangeable across all model years of the Crosstour front turn signal position.
The BAY15d bayonet base features two offset pins at different heights, a design that prevents incorrect single-filament bulbs from being seated in a dual-filament socket.
The rear turn signal on the Honda Crosstour uses the 7440NA across all four model years from 2012-2015, making it the only position with a consistent bulb size throughout the vehicle's production span covered by these specifications.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, which distinguishes it from the dual-filament front turn signal bulbs used on the same vehicle.
The natural amber glass construction of all three bulb types produces the amber turn signal color through the glass itself rather than through a colored lens or coating.
All three bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The T20 wedge base of the 7440NA is physically incompatible with the BAY15d bayonet sockets used in the front turn signal positions, preventing cross-position substitution.