The Opel Kadett front and rear turn signal bulbs both utilize a 1034 size bulb for proper operation. The replacement chart covers 1970 to 1972 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 1034 bulb is the sole turn signal bulb type listed for the Opel Kadett across all documented positions and years in these specifications.
The 1034 is an ANSI-standard bulb recognized in the United States and Canada, operating at 12 volts with a dual-filament design rated at 21/5 watts.
The dual-filament construction of the 1034 allows it to serve two brightness levels within a single bulb, which is typical for applications requiring both a running light function and a brighter signal flash.
The 1034 uses a BAY15d bayonet base, a two-pin offset base type where the two pins are positioned at different heights to ensure correct polarity orientation during installation.
The 1034 is documented as a variant of the 1157, meaning the two types share closely related electrical and physical characteristics, though they are not confirmed as interchangeable within these specifications.
The Opel Kadett (1970-1972) uses the 1034 bulb in both the front and rear turn signal positions, indicating a uniform bulb fitment across those two locations for that model year range.