Chevrolet Captiva Sport front turn signal bulb size 4157NA and rear turn signal bulb sizes 3757NA or 5702AK are specified in this replacement chart. The chart covers 2012 to 2015 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 Chevrolet Captiva Sport uses the 4157NA bulb for the front turn signal across all four model years covered in the specifications, spanning 2012-2015.
The 4157NA is an ANSI-standardized dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament, and features natural amber glass rather than a coating to produce its amber output.
Natural amber glass, as used in the 4157NA, achieves its color through the glass composition itself, which is a different construction method from bulbs that rely on an applied amber coating over clear glass.
The rear turn signal of the Captiva Sport uses the 3757NA for 2013-2015, also a dual-filament T25 wedge bulb with natural amber glass rated at 12V, though its wattage is not specified in the provided data.
The 2012 Captiva Sport rear turn signal uses the 5702AK, a Sylvania part number designating an amber-coated variant of the ANSI 3157 bulb, rated at 12V with a 27W/7W dual-filament T25 configuration.
The 3757NA and the 5702AK share the same T25 wedge form factor and dual-filament design, but they differ in how amber output is achieved: the 3757NA uses natural amber glass while the 5702AK uses an amber coating applied over the bulb.
Because the 2012 rear turn signal position calls for the 5702AK while 2013-2015 positions call for the 3757NA, these two bulbs are not listed as interchangeable across those model years in the specifications, despite their shared physical format.
All three bulb types referenced in the specifications conform to ANSI standards applicable in the United States and Canada, indicating they meet the photometric and safety requirements defined by that standardization body.
The T25 wedge base is a common automotive bulb base type, and its presence across all three bulb numbers in these specifications means the front and rear turn signal sockets of the Captiva Sport share the same base format throughout the 2012-2015 range.
The dual-filament design of all bulbs listed allows a single socket position to serve two lighting functions, with the higher-wattage filament typically assigned to the brighter turn signal or stop function and the lower-wattage filament assigned to a secondary function such as a parking or running light.