Chrysler PT Cruiser front and rear turn signal bulbs utilize 5702AK, 4157NA, 3757NA, and 3157 bulb sizes across multiple generations. The replacement chart covers 2001 through 2010 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 Chrysler PT Cruiser front turn signal uses one of two bulb types across its production run: the 4157NA for model years 2001-2004 and 2006-2008, and the 5702AK for 2005 and 2009-2010.
The 4157NA and 5702AK are both dual-filament T25 wedge bulbs rated at 12V with a 27W/7W filament configuration, making the two types electrically equivalent despite their different part designations.
The 5702AK is a Sylvania-specific part number for a coated variant of the ANSI 3157 bulb. Its amber color is produced by a coating applied over the bulb envelope, whereas the 4157NA achieves its amber output through natural amber glass.
The rear turn signal on the Chrysler PT Cruiser follows a distinct split across its production years: the 3157 is specified for 2001-2005, while the 3757NA is specified for 2006-2010.
The 3157 is a clear, dual-filament T25 wedge bulb rated at 12V with a 27W/7W output, conforming to the ANSI standard used in both the United States and Canada.
The 3757NA carries the "NA" suffix, indicating a natural amber glass construction. This suffix designates a factory-tinted bulb intended to produce amber light without reliance on a colored lens or external coating.
All four bulb types specified across both front and rear positions share the T25 wedge base form factor, meaning the physical socket interface is consistent throughout the vehicle's turn signal system.
The 3757NA rear bulb specification does not include a listed wattage rating in the provided data, unlike the 3157, 4157NA, and 5702AK, which are all rated at 27W/7W.
The "NA" suffix on both the 4157NA and 3757NA denotes natural amber glass, a construction method that produces a color-stable amber output independent of any lens or housing tint.
Because the 5702AK is a manufacturer-specific designation rather than a universal ANSI number, substitution with a standard 3157-family bulb would require confirming that the replacement meets the amber output requirement for front turn signal use.