Engine BMW N54B30 under the hood

Engine BMW N54B30

BMW N54B30 engine was used for BMW 3 Series vehicles. It was put on the high-end 335i configuration after 2007, replacing the 330i and its 3-liter inline 6-cylinder engine (the model was positioned slightly lower than the BMW M3 with a 4-liter V8 engine). For 5 Series vehicles: Used on the mid-range BMW 535i since 2008, replacing the 3L 530i.

Specifications

Manufacturer Munich Plant
Also called N54
Production years 2006
Cylinder block alloy aluminum
Fuel system injector
Configuration inline
Number of cylinders 6
Valves per cylinder 4
Piston stroke, mm 89.6
Cylinder bore, mm 84
Compression ratio 10.2
Displacement, cc 2979
Power output, hp 306/5800
326/5800
340/5900
Torque output, Nm / rpm 400/1300-5000
450/1500-4500
450/1500-4500
Fuel type 95
Euro standards Euro 5
Weight, kg ~187
Fuel consumption, L/100 km (for E92 335i)
— city
— highway
— combined
13.2
6.7
9.1
Oil consumption, gr/1000 km up to 700
Recommended engine oil 5W-30 / 5W-40
Engine oil capacity, liter 6.5
Oil change interval, km 10000
Normal engine operating temperature, °C ~115
Engine lifespan, km
— official information
— real

~300

Frequent problems

Engine BMW N54B30
The breakdown of the high pressure fuel pump is perhaps the main drawback of the N54-modification engines. The regularity of its occurrence is the higher, the further the mileage has passed over 50 thousand km. The reason for this lies primarily in the constant pouring of a low-quality fuel mixture into the car’s tank. The first sign is a decrease in power. The disease can only be cured by completely replacing the high pressure fuel pump, since its cost is within reasonable limits.

Among other breakdowns of the unit, depending on the distance traveled, one can distinguish:

  • High pressure nozzles – about 100 thousand km.
  • Pump and candles – travel about twenty thousand km.
  • Turbines rarely live up to 110 thousand km, although much depends on the operating conditions.

On average, this series of engines from the BMW manufacturer is quite stable and reliable. It is distinguished primarily by a large resource reserve, power and high potential for tuning. Therefore, buying the N54 is a worthy choice against the background of analogs in its price segment.

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