The Honda CRX inner tail light requires a 168 bulb size while the outer tail light uses a 2057 bulb size for proper illumination. The replacement chart covers 1988 to 1991 model 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 Honda CRX uses two distinct bulb types across its tail light assembly for the 1988-1991 model years: the 168 for the inner tail light position and the 2057 for the outer tail light position.
The 168 bulb is an ANSI-standard miniature wedge type with a T10 form factor, rated at 12V and 4.9W. Its low wattage reflects its role as a marker or courtesy light rather than a primary brake or turn signal source.
The 2057 bulb is a dual-filament type with a BAY15d bayonet base, rated at 12V with a split wattage of 26.9W on the high filament and 8W on the low filament. The dual-filament design allows a single bulb to serve both a running light function and a brighter stop or turn signal function.
The 2057 is noted as a brighter variant of the 1157. While the two share the BAY15d bayonet base, they are not identical in output, and substituting one for the other may result in differing brightness levels in the outer tail light position of the Honda CRX.
Both the 168 and 2057 conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications within those markets.
The 168 wedge base and the 2057 BAY15d bayonet base are mechanically incompatible with each other, meaning the inner and outer tail light sockets on the CRX are not interchangeable despite both operating on a 12V system.
The consistent bulb fitment across all four model years covered means that replacement parts sourced for any year within the 1988-1991 range will be physically and electrically compatible with the others in the same socket position.