BMW M43

BMW M43
Overview
Manufacturer BMW
Production 19912002
Combustion chamber
Configuration SOHC Straight-4
Chronology
Predecessor BMW M40
Successor BMW N42
BMW M43B16 in a 316i Compact

The BMW M43 is a straight-4 SOHC piston engine which replaced the M40 and was produced from 1991-2002.[1] 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).[2][3]

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.[1]

Models
EngineDisplacementPowerTorqueRedlineYear
M43B161596 cc75 kW (101 hp) @ 5500150 N·m (111 lb·ft) @ 390062001991
M43B181796 cc85 kW (115 hp) @ 5500168 N·m (124 lb·ft) @ 390062001993
M43B191895 cc87 kW (118 hp) @ 5500180 N·m (133 lb·ft) @ 390062001998
77 kW (105 hp) @ 5300165 N·m (122 lb·ft) @ 250062001999

M43B16

The 1.6 L (1596cc) M43B16 produces 102 hp and 150 Nm. It uses the Bosch Motronic 1.7.1 fuel injection system.[4]

Applications:

M43B18

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.[4]

Applications:

M43B19

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.[4]

Applications:

References

External links

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