The Volvo WI uses 1156 bulb sizes for both front and rear turn signal applications. Replacement specifications in the chart span 1996 to 1998 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 is the sole bulb type listed across all turn signal positions in the Volvo WI specifications, covering both front and rear applications for the 1996-1998 model years.
The 1156 is a single-filament bulb, meaning it is designed to perform one lighting function rather than serving dual roles such as combined stop and tail duties.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent turn signal applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d base found on some other automotive bulbs.
The 1156 conforms to ANSI standards and is recognized across both the United States and Canada, indicating a standardized specification rather than a market-specific variant.
Because the Volvo WI shares the same 1156 bulb type across both front and rear turn signal positions for all three listed model years, the front and rear sockets accept the same replacement bulb.
The 1156 should not be substituted with the visually similar 1157, which carries a BA15d dual-contact base and a second filament. The differing base pin configuration makes the two bulbs physically incompatible in single-contact sockets.