The Volvo WG uses a P21W bulb size for the front turn signal and a 1156 bulb size for the rear turn signal. The replacement chart covers vehicle production spanning 1996 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volvo WG uses P21W bulbs in the front turn signals and 1156 bulbs in the rear turn signals across the 1996-1998 model years.
P21W is an ECE-standard bulb used primarily in European and worldwide markets, while the 1156 follows the ANSI standard common to the US and Canadian markets.
Despite originating from different standardization systems, both the P21W and 1156 are electrically identical, each rated at 12 volts and 21 watts with a single filament.
Both bulb types share the BA15s bayonet base, a single-contact base with a 15mm collar width, which physically allows either bulb to seat in the same socket type.
The shared BA15s base between the P21W and 1156 does not automatically confirm cross-compatibility in the Volvo WG, as socket housing design and regional certification requirements may differ between the front and rear positions.
The single-filament design of both bulbs means each serves only one lighting function per socket, with no combined stop and turn operation from a single bulb in these positions.