The Volvo WX uses the 67 bulb for both front and rear side marker positions across the 1996-1998 model years.
The 67 is an ANSI-standardized bulb recognized in both the United States and Canada, operating at 12 volts and 8 watts.
It is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as running and braking signals.
The 67 uses a BA15s bayonet base, a single-contact mount where the bulb locks into the socket with a twist rather than a threaded or plug-in connection.
The 67 is a lower-wattage variant of the 1156 bulb, which shares the same BA15s base type but draws significantly more power at approximately 26.9 watts.
Because the 1156 and 67 share the same base, physical fitment is possible between the two, but the wattage difference makes them non-interchangeable without risk of electrical or housing incompatibility in the Volvo WX application.