The Opel Kadett front and rear side marker bulbs both utilize a 97 size bulb specification. The replacement chart covers vehicle production spanning 1970 to 1972 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 97 bulb is the sole type specified for the Opel Kadett across all listed side marker positions and years.
The 97 is an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts with a 13-watt output.
It uses a BA15s bayonet base, which is a single-contact, single-pin fitting. The "s" designation indicates a single center contact at the base, distinguishing it from double-contact variants.
The 97 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as running and braking, into one unit.
The 97 is classified as a variant of the 1156 bulb. While the two share the BA15s base type, they are not identical, and substitution between them is not supported by these specifications.
The Opel Kadett (1970-1972) uses the same 97 bulb size for both the front and rear side marker positions, indicating no differentiation in bulb type between the two locations.