The Most Common BMW M43B19 Engine Problems

This brand of M43B19 engines went into production back in 1998 and until 2002 pleased its consumers and car owners with good work. The cylinder block here was made of cast iron.

A high-quality injector was present as a power supply system. The row arrangement did not distinguish the device from its competitors. Only 4 cylinders were available here. And each cylinder had 2 valves.

Professionals recorded a piston stroke of 83.5 millimeters, and a cylinder diameter of 85 millimeters. The compression ratio in this model was 9.7. This engine has a volume of 1.9 liters. At 5500 rpm it put out 118 horsepower, and at 5300 rpm it was reduced to 105 horsepower.

The maximum torque at 2500 rpm is 165 Nm. If you increase the rpm to 3900, then you can get a torque of 180 N * m. It is best to use gasoline grades of at least 95 here, this will keep the part intact.

It has the Euro 3 environmental standard, and the engine weighs 138 kilograms. Gasoline consumption in urban areas will be 11 liters per 100 kilometers, on the highway this figure will drop to 6 liters per 100 kilometers, and in a mixed area the consumption will be about 8 liters per 100 kilometers. For 1000 kilometers, oil consumption will be almost 1000 grams.

For full-fledged work, you can use the following oils: 5W-30, 0W-30, 5W-40, 0W-40. The engine contains approximately 4 liters of oil. Replacement is best done every 7-10 thousand kilometers.

When the engine is in operating mode, the temperature ranges from 90 to 95 degrees. The resource of the device will be more than 300 thousand kilometers in practice. Potentially tuning can give more than 150 horsepower.

This engine is installed on the following models:

M43B19 Engine Modifications

  • The M43B19 UL was produced from 1998 to 2001 inclusive. This is a weak model with an additional camshaft. Power here is 105 horsepower at 5300 rpm. The maximum torque will be 165 Nm at 2500 rpm.
  • The M43B19 OL was produced from 1998 to 2002 inclusive. This version is the base one, it has 118 horsepower at 5500 rpm. The maximum torque here is 180 N * m at 3900 rpm.

M43B19 engine specifications

Power, hp118
Fuel typePetrol
Volume, cm*31895
Maximum torque, N * m (kg * m) at rpm.180 (18) / 3900
Fuel consumption, l/100 km7.9
engine’s typeIn-line, 4-cylinder
CO2 emissions, g/km188
Number of valves per cylinder2
Maximum power, hp (kW) at rpm118 (87) / 5500
Compression ratio9.7

M43B19 Engine Advantages

At the very first stage of development, the M43B19 engine was called M43TU and was a modified version of previous models. Here, the block for the cylinders had to be completed under the balancing shafts. It became slightly bored out for the pistons and also used a crankshaft for increased piston stroke. The connecting rods and pistons have also changed.

The camshaft in the weak version was changed, the rest in the cylinder head was not touched. The exhaust manifold is made of plastic; the proven Bosch was installed as the engine control system.

Machines index 18i or 16i were completely suitable for this unit. And in parallel, the developers produced models that had 16V. After replacing the motor, a model with a volume of 2 liters appeared.

Most Common M43B19 Engine Problems

The new system led to the fact that sometimes the model was “famous” for the flow of oil. The valve cover usually in such versions has the most flaws. Solving such a problem is not difficult, you need to replace the gasket, sealant and KVKG.

The M43B19 engine usually makes ambiguous characteristic sounds, crackles, makes noise, knocks. This may be due to a broken damper. To prevent such problems, you need to use the repair kit in time. In addition, hydraulic expansion joints can also knock.

During acceleration, sometimes drivers find speed dips, the car can float at speed, the engine overheats. But small power is the biggest problem, because the power plant has insufficient resources.

In general, the M43B19 engine has a good resource, if you take good care and maintain the car, you can drive many hundreds of kilometers. Operation without problems is almost impossible here.

Chip tuning

Most often, in order to increase the power of this M43B19 engine, experts use a stroker from neighboring models. If desired, the user can familiarize himself with the main manipulations from any professional. You can also install a cold intake, an intake manifold for sports models and a camshaft with a phase of 266 to 272.

An exhaust manifold with 4-2-1 technology is also used. In lower gears, the car will lose a little, but you can squeeze out another 20 to 30 horsepower. The best way to upgrade a car is to buy an engine with a contract and install a powerful engine with reliable performance at the very beginning. The rating of this device is assessed by experts as good.

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