BMW M43
| BMW M43 | |
|---|---|
| Overview | |
| Manufacturer | BMW |
| Production | 1991–2002 |
| Combustion chamber | |
| Configuration | SOHC Straight-4 |
| Chronology | |
| Predecessor | BMW M40 |
| Successor | BMW N42 |
The BMW M43 is a straight-4 SOHC piston engine which replaced the M40 and was produced from 1991-2002. Displacement ranges from 1.6 L to 1.9 L. The M43 powered base-model cars, while higher performance models at the time were powered by the DOHC M42 or M44.
Compared with its M40 predecessor, it features a dual-path intake manifold (called Individual Control Intake Manifold by BMW) to provide torque across a wider rev range, knock sensing and a timing chain (instead of the M40's timing belt).
The engine was built solely on Assembly Line 2 at Steyr. A total of 1,204,734 units came off the production line, making this the Steyr plant's highest-production engine.
In 1998 the displacement was increased to 1.9 litres, increasing torque to 180 Nm at 3900 rpm.
The 1.6 L (1596cc) M43B16 produces 102 hp and 150 Nm. It uses the Bosch Motronic 1.7.1 fuel injection system.
Applications:
The M43B18 has a 1796 cc displacement. It produces 115 hp and 168 Nm and uses the Bosch Motronic 1.7.1 fuel injection system.
Applications:
The M43B19 (also known as the "M43TÜ") is the largest M43 engine, with a displacement of 1895 cc. It produces up to 118 hp and 180 Nm and uses BMW BMS 46 fuel injection system.
Applications:
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