BMW M40B16 Engine Specs, Problems & Reliability

BMW M40B16 Engine – Here in this post, I have taken all the details about BMW M40B16 Engine from the (official site) including BMW M40B16 Engine specs, Weight, Price & Dimension.

We believe to provide accurate details to our readers and we prefer only official sources for information about BMW M40B16 Engine.

All the details which you want to know about BMW M40B16 Engine you can find in this article which is updated.

BMW M40B16 Engine

The BMW M40B16 engine – a 4-cylinder engine with a low volume in line with the BMW M40 series, was launched in 1988 and built on the M40B18.

M40B18 engine, which had a crankshaft with shorter strokes and additional pistons, was fitted. However, connecting rods remained the same.

M40 1.6 differs from 1.8 in the intake valve, the throttle valve spark plugs, and the ECU. The cylinder head is not changed and remains the same single camshaft with eight valves (SOHC) that comes with compensations for clearance of the valve that is hydraulic.

The diameter of the intake valves is 42 millimeters, and the exhaust is 36 mm. The characteristics for the M40 camshafts Phase 244/244 rise 10.6/10.6 mm.

The drive of the timing belt, however, the belt itself, could be more reliable and needs to have the correct size. As a consequence that it needs more resources.

The replacement of the timer belt or the roller for the M40 is necessary every 40 thousand kilometers, or when it fails, and the engine is bent, it will break the valve.

This motor was found on BMW automobiles with an index of 16i.

BMW M40B16 Engine

BMW M40B16 Engine Specs

The company initially designed its 1.6-liter M40 series motor (full name: M40B16) in 1988. The tiny engine was created using the M40B18 motor, which has a 1.8-liter displacement and a more comprehensive stroke.

Manufacturer Steyr Plant
Production years 1987-1994
Cylinder block material Cast Iron
Cylinder head material Aluminum
Fuel type Gasoline
Fuel system Fuel injection (Bosch Motronic 1.3 (E30), Bosch Motronic 1.7 (E36))
Configuration Inline
Number of cylinders 4
Valves per cylinder 2
Valvetrain layout SOHC
Bore 84.0 mm
Stroke 72.0 mm
Displacement 1596 cc
Type Four-stroke, naturally aspirated
Compression Ratio 9:1

BMW M40B16 Engine Problems & Reliability

All M40 series engines are good. They last between 180 and 200 thousand miles. However, the M40B16 has issues, like insecure timing belts, etc.

The primary problem with the engine is its age. Most of them require repair or replace older components, and all BMW components are costly.


M40B16 between 1988 and 1991. This is an unmodified base engine with no catalyst. The horsepower is 102 hp at 5,500 rpm. The torque is at 105 pounds (143 Nm) at 4,250 rpm.

In 1991 was released an updated version of the M40B16 had a catalyst. It’s got less power and torque, 100 HP at 5,500 rpm, and 104 lb-ft (141 Nm) at 4,250 rpm.

BMW M40B16 Engine FAQs

What is the BMW M40B16?

M40 engines were introduced to replace the previous M10 series, were extremely popular, and were the norm for BMW models at the time. The following year M40 was released by the company. It was a smaller version of the 1.6-liter M40B16 motor.

What kind of engine does a BMW M40 have?

BMW M40 engine modifications and variations. 1. M40B16 (1988 between 1988 and M40B16 (1988 -) can be described as a basic version of an engine that does not have a catalyst. It produces 102 horsepower at 5,500 rpm and 143 Nm torque at 4,250 RPM.

Why did BMW stop making The M40B18?

It is believed that the M40B18 application is a model of 18i. This engine was discontinued in 1994 because BMW already had a new machine for two years: M43B18. 1. The most common issue is the timing belt.

When did the Mercedes Benz M40B18 engine come out?

In 1988, the manufacturer began production of the M40B16 engine with a 1.6-liter displacement (the full name is M40B16). The M40B18 engine with a 1.8-liter displacement was created to replace the small engine. It has a longer stroke and a 1.8-liter displacement. Cast iron cylinder blocks make this engine durable and reliable.

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