The N52B30 ICE debuted in 2004 and was offered in five variants: from 218 to 272 hp. for the European and US market. In 2006 and 2007, the 3.0-liter engine was included in the Ward’s 10 Best Engines list as the best in-line six-cylinder engine. The 218-horsepower version was produced in two versions, with a torque of 270 and 280 Nm and was designated as N52B30 U1.
Specifications
| Manufacturer | Munich Plant |
| Also called | N52 |
| Production years | 2004-2011 |
| Cylinder block alloy | magnesium-aluminum |
| Fuel system | injector |
| Configuration | inline |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 88 |
| Cylinder bore, mm | 85 |
| Compression ratio | 10.7 |
| Displacement, cc | 2996 |
| Power output, hp | 218/6100 218/6100 231/6500 258/6600 258/6600 265/6600 272/6650 |
| Torque output, Nm / rpm | 270/2400-4200 280/2500-3500 270/2750 300/2500-4000 310/2600-3000 315/2750 315/2750 |
| Fuel type | 95 |
| Euro standards | Euro 5 |
| Weight, kg | ~160 |
| Fuel consumption, L/100 km — city — highway — combined |
13.6 6.6 9.2 |
| Oil consumption, gr/1000 km | up to 1000 |
| Recommended engine oil | 5W-30 / 5W-40 |
| Engine oil capacity, liter | 6.5 |
| Oil change interval, km | 10000 |
| Normal engine operating temperature, °C | ~95 | Engine lifespan, km — official information — real |
— ~300 |
Frequent problems
Malfunctions of the N52B30 engine consist in high oil consumption, the appearance of extraneous sounds and floating speed.
Increased oil consumption is a major problem with N52B30 motors. The reason may be in the valve stem seals. You should also check the state of the KVKG.
If no action is taken at high oil consumption, catalytic converters can clog. To restore the operation of the unit, you need to buy new parts or install flame arresters.
The ticking sound is a feature of engines manufactured before 2009. This does not pose any problems for the power unit.
When the rpm is unstable, you need to check the Valvetronic system, as well as the Vanos valves and the flow meter. With improper maintenance: oil change every 20 thousand kilometers, use of low quality working fluids, Vanos fails. Flushing the system valves sometimes helps. If the problem persists, a replacement is required.
To exclude engine overheating, you should regularly check the cooling system, keep the radiator clean.
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