The
BMW M43 is an SOHC four-cylinder petrol engine which was produced from 1991-2002.
The M43 powered base-model cars, while higher performance models at the time were powered by the
BMW M42
The BMW M42 is a DOHC straight-four petrol engine which was produced from 1989-1996. It is BMW's first mass-production DOHC engine and was produced alongside the BMW M40 SOHC four-cylinder engine as the higher performance engine.
The M42 was rep ...
and
BMW M44 DOHC engines. The M43 was produced at the Steyr engine plant.
A version using
natural-gas
Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbon di ...
was produced for the
E36 318i and the
E34 518i.
Following the introduction of the
BMW N42 engine in 2001, the M43 began to be phased out.
Design
Compared with its
BMW M40 predecessor, the M43 features both a camshaft position sensor and a knock sensor as well as roller rockers and a timing chain (instead of the M40's finger rockers and timing belt). It also features a
dual length intake manifold ("DISA"), to provide torque across a wider rev range.
In 1998 the
displacement
Displacement may refer to:
Physical sciences
Mathematics and Physics
*Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path ...
was increased to , increasing torque to at 3900 rpm.
Versions
M43B16
The M43B16 produces and of torque. It uses the
Bosch Motronic 1.7.x and
Bosch BMS43
Bosch may refer to:
People
* Bosch (surname)
* Hieronymus Bosch (c. 1450 – 1516), painter
* Van den Bosch, a Dutch toponymic surname
* Carl Bosch, a German chemical engineer and nephew of Robert Bosch
* Robert Bosch, founder of Robert Bosch Gmb ...
engine management system.
There was also a
natural gas
Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbo ...
-powered version of this car (also able to run on petrol) for the 1995 BMW 316g Compact.
Applications:
* 1994-1998
E36 316i
* 1995-2000
E36/5 316g Compact
Engine Management Systems:
* 1993-09/1995
Bosch Motronic 1.7.2
* 1995-09/1997
Bosch Motronic 1.7.3
* 1997-2000
BMS43
M43B18
The M43B18 has a displacement. It produces and and uses the Bosch Motronic 1.7.1 fuel injection system.
There was also a less powerful
natural gas
Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbo ...
-powered version of this car (also able to run on petrol) for the BMW 518g Touring (E34). This model was only available for two years.
Applications:
* 1992-1998
E36 318i
* 1994-1996
E34 518i
* 1995-1996
E34 518g Touring
* 1995-2001
Z3 1.8
M43B19
The M43B19 (also known as the "M43TÜ") is the largest M43 engine, with a displacement of . It produces up to and , and uses BMW's BMS 46 engine management system.
The versions do not have the DISA intake manifold and also have a smaller camshaft compared to the 118 PS versions. Note the M43B16, M43B18 and the M43B19 (118 PS version) all have the same camshaft.
Applications— and :
* 1999-2001
E36 316i Compact
* 1999-2002
E46 316i
Applications— and :
* 1998-2001
E46 318i/318Ci
* 1999 -2002
Z3 1.9
References
See also
*
List of BMW engines
BMW has been producing engines for automobiles, motorcycles and aircraft since 1917, when the company began production of an inline-six aircraft engine. They have been producing automobile engines since 1933.
Motorcycle engines
Automotive ...
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M43
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