Engine BMW N52B30

The N52B30 is the first engine in the new N52 range (which includes the N52B25) with six cylinders in line. Unlike its predecessor (M54B30), the N52B30 is a completely new engine, with a new lightweight magnesium-aluminum cylinder block, a different crankshaft and a lightweight connecting rod and piston group.

The engine uses a new cylinder head using a variable valve timing system on the intake and exhaust camshafts Double-VANOS, and, for even greater efficiency, the Valvetronic II valve lift change system has been added. Their height varies from 0.18 mm to 9.9 mm. Exhaust valves – 9.7 mm. Phase 255/263. The diameter of the intake valves is 34.2 mm, exhaust 29 mm. Injectors have now also moved to the cylinder head, a DISA variable-length manifold is used at the inlet, a Siemens MSV70 engine management system, a chain is used in the timing.

The N52B30 engine was used on BMW cars with the 25i, 28i and 30i index, depending on the modification.


Production years 2004-2011
Displacement, cc 2996
Fuel system injector
Power output, hp 218 – 272
Torque output, Nm 270 – 315
Cylinder block aluminum R6
Block head aluminum 24v
Cylinder bore, mm 85
Piston stroke, mm 88
Compression ratio 10.7
Features Valvetronic, DISA
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 4/5
Fuel consumption, L/100 km (for E87 130i)
— city
— highway
— combined
Engine lifespan, km ~275 000

Disadvantages of the N52B30 engine

  • After 100,000 km, valve stem seals often tan here and oil burns appear;
  • The membrane of the crankcase ventilation valve also does not last long in this engine;
  • All this leads to gradual coking and further to unstable engine operation;
  • The cause of floating engine speeds is usually a malfunction of the Valvetronic or Vanos system;
  • Electrically, the oil level sensor is often buggy, which is fraught with oil starvation;
  • In power units of 2004 – 2009, hydraulic lifters clatter during a cold start.

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