Honda CRX front turn signal bulbs utilize 3497 or 1156 size specifications, while rear turn signal bulbs require 1156 size bulbs. The replacement chart covers 1988 to 1991 model 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 Honda CRX front turn signal uses two different bulb sizes across its model years, with 1988-1989 models requiring the 1156 and 1990-1991 models requiring the 3497.
The rear turn signal position uses the 1156 bulb across all four model years covered, spanning 1988-1991.
Both the 1156 and 3497 are ANSI-standardized bulbs rated for use in the US and Canada, operating at 12 volts with a 21-watt output.
Both bulb types share the BA15s bayonet base, a single-contact base design that secures the bulb with a twist-lock mechanism.
Both bulbs are single-filament types, meaning each serves only one lighting function rather than combining two functions such as turn signal and brake light into one bulb.
The 3497 is a variant of the 1156 and shares identical electrical ratings of 12V and 21W, as well as the same BA15s base type.
Despite the physical and electrical similarities between the 3497 and 1156, they are listed as distinct part numbers, and fitment specifications treat them as separate requirements for the 1990-1991 front turn signal position.