The 3-liter N53B30 engine represents the N53 family (which included the N53B25), appeared in 2007 and replaced the N52B30 of the same size. The new engine is a modified N52, in which the piston, cylinder head has changed, a direct fuel injection system has appeared, the ambiguous Valvetronic valve lift system has disappeared, and the engine management system has changed to Siemens MSD81.
BMW N53B30 engine modifications
- N53B30U0 (2007 – 2011) – base engine, power 218 hp at 6100 rpm, torque 270 Nm at 2400-4200 rpm. For versions with index 25i.
- N53B30 (2010 – 2013) – version with a capacity of 204 hp at 6700 rpm, a torque of 270 Nm at 1500-4250 rpm. For BMW F10 523i.
- N53B30O0 (2007 – 2013) – an analogue of the base engine with a different, full-fledged intake manifold, power 272 hp at 6700 rpm, torque 320 Nm at 2750-3000 rpm. For versions with index 30i.
- N53B30 (2010 – 2009) – version for the BMW F10 528i, power 258 hp at 6100 rpm, torque 310 Nm at 1600-4250 rpm.
Specifications
| Production years | 2007-2013 |
| Displacement, cc | 2996 |
| Fuel system | direct injection |
| Power output, hp | 204 – 218 (N53B30UL) 258 – 272 (N53B30OL) |
| Torque output, Nm | 270 (N53B30UL) 310 – 320 (N53B30OL) |
| Cylinder block | aluminum R6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 85 |
| Piston stroke, mm | 88 |
| Compression ratio | 12.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | double VANOS |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for BMW 530i 2008) — city — highway — combined |
12.6 6.6 8.8 |
| Engine lifespan, km | ~300 000 |
Disadvantages of the N53B30 engine
There are no particularly specific problems with the motor version of the N53. Its main problems are the lifetime of the high-pressure fuel pump, which does not exceed one hundred thousand kilometers, spark plugs that work no longer than ten thousand km, often failing ignition coils (operated about 50 thousand km) and serving no longer than 100 thousand km high pressure nozzles.
Among the main measures for the prevention of engine breakdowns during operation, one can single out: monitoring the cooling system, inspection and regular cleaning of the radiator – to prevent its overheating, and constant monitoring of the quality of the oils and gasoline poured in. Compared to the N52B25, this modification of the unit has a better overall resource and no problems associated with increased oil consumption.
