Overall, there were four countries of E24 variants, ie general or special modifications to engines for certain sales regions.

Europe: base model, left hand steering for the continental European countries in the EU and former right hand drive for Britain. As Europe at that time the largest market for BMW represented, were the most engine and special equipment options. Model Name: ECE or CAT

Switzerland / Sweden: For Switzerland in October 1982 from the current tightening emission and noise limits [20] has been extended until the end of 1984 a 635 CSi with a abgasgereinigten 3,2 l engine (Sekundärlufteinblasung, exhaust gas recirculation) are offered, this engine made 141 kW / 192 hp, this model was also sold in Sweden. From model year 1985 until the second model of care 1987, schweizer 635 CSi then an optional niederverdichteten 3,4 l engine with 150 kW/204 hp (Zündkennfeld and second for speeds under 65 km / h) or the European 3,4 l-Katmotor . Before and after above specified time periods differ in the Swiss 633 or 635 CSi CSi not by the ECE models. There was also no specific model name.

United States: for the North American market, so for the U.S. and Canada, some models, according to particular rules concerning exhaust emissions and crash safety (bumpers, Gurtwarner, third brake light) are offered. Model: U49 (for the 49 U.S. states excluding California), and later U50 (see CAL) California: since 1976 the CARB particularly sharp limits on the emissions from motor vehicles instructed, were from 1977 to 1979 models, the 630 CSi CSi and 633 for the Californian market in addition to the U.S. anyway for the necessary exhaust after-treatment operations with a revised ignition and injection equipment . The starting 09/79 in the United States offered 633 CSi performed serially, the emissions standards in California, so this particular version so that California accounted for. Model: CAL

Japan: the models for Japan regarding the corresponding emission measures the U.S. models from 07/79 (02/78-07/79: 633 CSi JAP with unregulated catalyst), but the slimmer bumpers of European vehicles. Up on the M6 in Japan all have delivered 633 CSi CSi and 635 automatic transmission. These vehicles were built until 11/1988. Sold volume: 633 CSi (1,888), 635 CSi (1848), M6 164th Model: JAP