BMW M43

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BMW M43
Overview
Manufacturer BMW
Production 1991–2002
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 (and its M44 successor).

A variant using natural-gas was produced for the E36 318g and the E34 518g.

Compared with its M40 predecessor, it features a dual length intake manifold[2] (called "DISA" by BMW) to provide torque across a wider rev range,[3] knock sensing[4] and a timing chain (instead of the M40's timing belt).[5][6]

The M43 was produced at the Steyr engine plant.[7] A total of 1,204,734 units were produced.[citation needed]

In 1998 the displacement was increased to 1.9 litres, increasing torque to 180 Nm at 3900 rpm.[1]

Models[edit]

Engine Displacement Power Torque Redline Year
M43B16 1596 cc 75 kW (105 hp) @ 5500 150 N·m (111 lb·ft) @ 3900 6200 1991
M43B18 1796 cc 85 kW (115 hp) @ 5500 168 N·m (124 lb·ft) @ 3900 6200 1993
M43B19 1895 cc 87 kW (118 hp) @ 5500 180 N·m (133 lb·ft) @ 3900 6200 1998
77 kW (105 hp) @ 5300 165 N·m (122 lb·ft) @ 2500 6200 1999

M43B16[edit]

The 1.6 L (1596cc) M43B16 produces 102 hp and 150 Nm. It uses the Bosch Motronic 1.7.1 fuel injection system.[8]

Applications:

M43B18[edit]

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.[8]

Applications:

M43B19[edit]

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.[8]

Applications:

  • 87 kW (118 hp) and 180 N·m (133 lb·ft)
  • 77 kW (105 hp) and 165 N·m (122 lb·ft)

References[edit]

  1. ^ a b "Engine specifications for M43 engines". www.bmwheaven.com. Retrieved 3 March 2017. 
  2. ^ "BMW M40 and M43 Four Cylinder Engines". www.unixnerd.demon.co.uk. Retrieved 3 March 2017. 
  3. ^ "What is a DISA valve?". www.bimmerforums.com. Retrieved 24 February 2017. 
  4. ^ "Motorenkunde über BMW Motoren". www.bmw-syndikat.de (in German). Retrieved 2 March 2017. 
  5. ^ "Timing and valve train-timing chain". www.bmwfans.info. Retrieved 3 March 2017. 
  6. ^ "Timing and valve train-tooth belt". www.bmwfans.info. Retrieved 3 March 2017. 
  7. ^ "BMW M43 engine". www.australiancar.reviews. Retrieved 2 March 2017. 
  8. ^ a b c "BMW World - 4-Cylinder Engines". www.usautoparts.net. Archived from the original on 2 March 2014. 

See also[edit]