Released in 1985, the inline six-cylinder M103 E30 engine was intended to replace the outdated M110 engine in all respects and was partially unified with the four-cylinder M102 2l. The next M103 series (which also included the 2.6-liter M103 E26) received a new lightweight cast iron cylinder block and a 12-valve block head with one camshaft and hydraulic lifters, instead of the previous 24-valve two-shaft, which was due to the desire to increase efficiency, reduce power plant weight and production costs.
Specifications
| Manufacturer | Stuttgart-Bad Cannstatt Plant |
| Also called | M103 |
| Production years | 1985-1993 |
| Cylinder block alloy | cast iron |
| Fuel system | injector |
| Configuration | inline |
| Number of cylinders | 6 |
| Valves per cylinder | 2 |
| Piston stroke, mm | 80.2 |
| Cylinder bore, mm | 88.5 |
| Compression ratio | 9.2 10 |
| Displacement, cc | 2962 |
| Power output, hp | 180-190/5700 |
| Torque output, Nm / rpm | 255-260/4400-4500 |
| Fuel type | 95 |
| Euro standards | — |
| Weight, kg | ~170 |
| Fuel consumption, L/100 km — city — highway — combined |
16.0 10.5 14.5 |
| Oil consumption, gr/1000 km | up to 1500 |
| Recommended engine oil | 0W-30 / 0W-40 / 5W-30 / 5W-40 / 5W-50 / 10W-40 / 10W-50 / 15W-40 / 15W-50 |
| Engine oil capacity, liter | 6.5 |
| Amount of engine oil for replacement, liter | ~6.0 |
| Oil change interval, km | 7000-10000 |
| Normal engine operating temperature, °C | ~90 | Engine lifespan, km — official information — real |
— 400+ |
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