Chrysler Aspen front turn signal bulbs utilize 3457NA or 3357NA size specifications, while rear turn signal bulbs require 3057 size. The replacement chart covers 2007 through 2009 production 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 Chrysler Aspen uses three distinct bulb types across its front and rear turn signal positions: the 3457NA, 3357NA, and 3057, all of which conform to ANSI standards recognized in the United States and Canada.
All three bulb types share the T25 wedge base form factor and operate on a 12-volt electrical system, making them part of the same broad family of automotive wedge bulbs.
The 3457NA and 3057 are dual-filament bulbs rated at 27W and 7W respectively, meaning each bulb serves two lighting functions within a single housing, typically combining a brighter turn signal output with a lower-intensity running or parking light function.
The 3357NA is a single-filament bulb rated at 27W, dedicated solely to one lighting function rather than sharing a housing role between two circuits.
The 3457NA and 3357NA both feature natural amber glass, which produces an amber-colored output without the need for an amber-tinted lens or a separately coated bulb envelope.
The 3057 lacks the natural amber glass of the NA-designated bulbs, indicating it relies on the vehicle's lens or housing to produce the required amber turn signal color rather than the bulb itself.
For the Chrysler Aspen front turn signal, the 2008-2009 model years use the 3457NA, while the 2007 model year uses the 3357NA. These two bulbs are not interchangeable despite sharing the T25 base, as one is dual-filament and the other is single-filament.
The rear turn signal on the Chrysler Aspen uses the 3057 across all three model years, 2007-2009, without variation.
Although the 3457NA and 3057 share the same wattage ratings of 27W/7W and the same T25 wedge base, the 3457NA carries natural amber glass while the 3057 does not, which distinguishes their intended installation positions on the vehicle.
Substituting a single-filament 3357NA in place of a dual-filament 3457NA position, or vice versa, would result in an incomplete circuit connection, as the socket contacts for dual-filament and single-filament configurations differ in their electrical layout.