Freightliner Coronado Parking Light Bulb Size

Additional Notes

• The Freightliner Coronado uses the 3157NA bulb for its parking light across all listed model years, spanning 2012-2018.
• The 3157NA is a dual-filament bulb, meaning it contains two separate filaments within a single housing, one rated at 27W and the other at 7W, allowing it to serve two distinct lighting functions.
• The bulb operates on a 12V electrical system, which is standard for automotive and commercial vehicle lighting circuits.
• The "NA" designation in 3157NA refers to the natural amber glass envelope, which produces an amber-tinted output without the use of a separate colored lens or filter.
• The 3157NA follows the T25 wedge form factor, a classification that describes the shape and base type of the bulb used for physical fitment into the socket.
• The 3157NA carries ANSI standardization recognized in both the United States and Canada, indicating it conforms to a defined set of performance and dimensional criteria under North American standards bodies.
• The standard 3157 and the 3157NA share the same base and electrical ratings, but the natural amber glass of the 3157NA makes it non-interchangeable in applications where the housing relies on a clear lens to produce the required amber output, as substituting a clear-glass 3157 would alter the emitted color.