BMW introduced the 633 CSi as part of the first-generation 6 Series, internally known as the E24, and it arrived alongside the carbureted 630CS in 1976. The model helped establish BMW’s new grand touring coupe formula: a long-hood, two-door car aimed at buyers who wanted upscale touring comfort with a sporting character. The 633 CSi used Bosch fuel injection rather than a carburetor, which was a defining technical difference from the entry model and a key part of its identity from the start.
In BMW’s own classic model catalogue, production for the 633 CSi is listed from January 1976 through April 1982. That places it squarely in the first and only production run of the original E24 6 Series. Within that era, the 633 CSi became one of the best-known versions of the early 6 Series, sitting below later, more powerful six-cylinder variants while still representing the model line’s blend of elegance and driving focus.
BMW also notes an important update in September 1979, when the engine management was modernized with digital motor electronics. That change reflected the 633 CSi’s role in the brand’s transition toward more advanced engine control systems, while preserving the car’s position as a refined six-cylinder coupe rather than a full-bore performance special.
Today, the 633 CSi is remembered as one of the signature early E24s and an important chapter in BMW coupe history. It helped define the first 6 Series as a stylish, technically progressive grand tourer and laid the groundwork for the nameplate’s later reputation among enthusiasts.