Honda CRX front and rear side marker bulbs utilize a 168 bulb size for replacement applications. The replacement chart covers 1988 to 1991 vehicle 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 168 bulb is the sole bulb size specified for the Honda CRX across all side marker positions for the 1988-1991 model years.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated specification framework for miniature automotive lighting.
It is classified as a T10 miniature wedge bulb, a form factor defined by a wedge-shaped base that seats directly into a socket without a separate metal cap or bayonet pins.
The T10 wedge base design means the bulb is retained by the tension of the socket itself rather than by a locking mechanism, which is a common trait of low-wattage marker and courtesy light applications.
The 168 operates at 12 volts, consistent with the standard electrical system voltage of passenger vehicles of that era.
At 4.9 watts, the 168 draws relatively low current, which is typical for side marker bulbs that serve a visibility and signaling function rather than primary illumination.
The front and rear side marker positions on the Honda CRX share the same 168 bulb size across all four model years covered, indicating no positional differentiation in the specification.
Because the T10 wedge base is a widely used form factor, multiple bulb part numbers from different manufacturers may physically fit the socket, though only the 168 rating matches the original wattage and voltage specification for this application.