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The BMW E34 is the version of the BMW 5 Series automobile built from mid-1987 to 1996, with the Touring model ending June 1996. It replaced the BMW E28 in 1988 and was replaced by the E39 in 1996.
The E34 succeeded the BMW E28 in 1989 with two models. The 525i used the BMW M20 engine while the 535i used the larger M30. The cars were a blend of BMW tradition and modern technology. BMW's traditional FR layout and straight-6 were used, providing the smooth engine and optimal weight distribution BMW customers had come to expect. The E34 also had a much stiffer body and was more streamlined than its predecessor, looking very much like the BMW E32 7-series.
The E34 was among the most reliable luxury cars on the market, earning the best-in-class reliability rating from Intellichoice in 1991. It is still considered one of the most reliable BMWs made. It was also one of the safest cars on the road during its production,[citation needed] providing airbags, 4-wheel anti-lock brakes, and a very rigid body structure to protect occupants in the event of an accident. The E34's 60-0 mph (97 to 0 km/h) stopping distance of 130 feet (40 m) was the best of any production sedan in 1990.[citation needed] It was also equipped with dynamic stability control (DSC) or skid control in later years on higher-specification variants.
A few enhancements to the body's cosmetics and functionality, as well as a slew of engine and transmission evolutions, have appeared throughout its years of production. Among those, BMW's VANOS variable valve timing technology made its first appearance in the M50 2.5L engines built in September 1992 and later.
518i (1989–1994) M40B18 Engine, 53,254 built[1] (all versions)
518i (1994–1996) M43B18
520i (1987–1990) M20B20, 427,122 built (all versions)
520i ECE (1987–1990) M20B20 (higher compression than 520i non ECE)
520i (1990–1996) M50B20
525i (1987–1990) M20B25, 434,567 built (all versions)
525i (1990–1996) M50B25
525iX (1991–1996) M50B25 (four-wheel drive version), 9,366 built
524td (1987–1991) M21D24, 70,901 built
525td (1993–1996) M51D25UL, 19,334 built
525tds(1991–1996) M51D25OL, 122,401 built
530i (1987–1990) M30B30, 20,279 built
530i (1992–1996) M60B30, 37,292 built
535i (1987–1993) M30B35, 99,861 built
540i (1992–1996) M60B40, 26,483 built
M5 (1988–1995) S38B36, S38B38, 12,254 built
518g (1995–1996) CNG Engine (Touring body only), 298 built
While Europe was given a large selection of engine choices and combinations, the North American market was more limited. While North America received only the 525i, 525i Touring, 535i, 530i, 530i Touring, 540i, and the M5, the European market also got the E34 518i, 520i, 6-cylinder 530i, diesel 525td/s, 525iX, M5 touring and 540i Touring. The cars were also available earlier in Europe than in America.
The 525i was built throughout the E34 production, and in 1992 was offered as a wagon (touring version) in the USA. In June 1990 (1991MY), the engine was switched from the single overhead cam M20 engine to the double overhead cam M50B25 engine, raising power from 167 to 189 horsepower (141 kW) also increasing fuel economy by ten percent, while a change from a timing belt to a timing chain improved reliability. A further revision of the 525i engine took place in 1993, when VANOS was added to the M50 engine which was designated the M50TU. The TU represents a Technical Update, reflecting the variable valve timing technology (VANOS) added to the intake camshaft. VANOS brought a moderate horwepower increase, but flattened the torque curve from about 3,000 RPM up to redline at approximately 6,300 RPM. Power is commonly increased through slight modifications by way of a new engine management computer chip.
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