The John Deere Gator CX 4x2 uses a 3157NA bulb size for front turn signals and a 3457 bulb size for rear turn signals. The replacement chart covers 2010 to 2015 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 John Deere Gator CX 4x2 uses two distinct bulb types across its front and rear turn signal positions for the 2010-2015 model years: the 3157NA at the front and the 3457 at the rear.
Both the 3157NA and 3457 are dual-filament T25 wedge bulbs rated at 12V with a 27W/7W output, meaning the higher wattage filament serves the turn signal function while the lower wattage filament serves a secondary function such as running light duty.
Both bulb types conform to ANSI standards applicable in the United States and Canada, classifying them as standardized replacements within those markets.
The 3157NA used in the front turn signal position of the Gator CX 4x2 features natural amber glass, which filters the light output to produce an amber color without relying on an amber-tinted lens.
The 3457 used in the rear position does not carry the natural amber glass designation, indicating it produces a clear or white light output that relies on the vehicle's lens for any color filtering.
Despite their different part numbers, the 3157NA and 3457 share the same T25 wedge base and identical voltage and wattage ratings, which can create confusion during replacement; however, the amber glass coating on the 3157NA makes it position-specific for applications requiring a colored output at the bulb itself.
The T25 designation refers to the bulb's tubular envelope size, a common form factor in automotive wedge-base lighting used across a wide range of vehicle types and manufacturers.
The dual-filament design of both bulbs distinguishes them from single-filament alternatives, as the two separate filaments allow one socket to serve more than one lighting function simultaneously.