Opel Manta front and rear side marker bulbs use a 97 size bulb across all configurations. The replacement chart covers 1971 to 1975 production 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 Opel Manta uses the 97 bulb for both front and rear side markers across the 1971-1975 model years.
The 97 is an ANSI-standardized bulb type, meaning it conforms to a defined set of electrical and physical specifications recognized across the United States and Canada.
It operates on a 12-volt electrical system and draws 13 watts, placing it in the low-wattage range typical of auxiliary lighting applications such as side markers.
The 97 uses a single-filament design, which means it serves one lighting function only, as opposed to dual-filament bulbs that can handle two functions such as running and braking.
Its base type is BA15s, a single-contact bayonet fitting where the "s" denotes a single contact pin at the base, distinguishing it from the dual-contact BA15d variant.
The 97 is noted as a variant of the 1156 bulb. While the two share the BA15s bayonet base and general construction, they are not identical, and substitution between them warrants attention to wattage and voltage tolerances for the specific application.
The uniform use of the 97 across both front and rear positions on the Manta means a single bulb type covers all four side marker positions on the vehicle.