Engine BMW N63B44

The 8-cylinder BMW N63B44 engine with a volume of 4.4 liters has been produced since 2008 and is installed on almost all modern large models of the German automaker. There are a number of sports versions of this engine under the S63 index and up to 600 hp. Designed according to the concept of “Efficient Dynamics”, which means a combination of engine efficiency and driving comfort. In the quest to create an energy-intensive and environmentally friendly engine, BMW is making confident steps, although it is not so easy to do this.

This series can be safely called a new generation engine – direct fuel injection system, and, notably, two turbochargers located in the camber of the cylinder blocks are an innovation first developed by BMW engineers.

Other modifications of N63: N63B40.

The engine was installed on:

  • BMW 5-Series F07 in 2009 – 2017; 5-Series F10 in 2010 – 2017; 5-Series G30 since 2017;
  • BMW 6-Series F06 in 2012 – 2018; 6-Series F12 in 2011 – 2018;
  • BMW 7-Series F01 in 2008 – 2015; 7-Series G11 since 2015;
  • BMW 8-Series G15 since 2018;
  • BMW X5 E70 in 2010 – 2013; X5 F15 in 2013 – 2018; X5 G05 since 2018;
  • BMW X6 E71 in 2008 – 2014; X6 F16 in 2014 – 2019;
  • BMW X7 G07 since 2018.

Specifications

Production years since 2008
Displacement, cc 4395
Fuel system direct injection
Power output, hp 408 (N63B44O0 or N63B44)
450 (N63B44O1 or N63TU, N63B44O2 or N63TU2)
462 (N63B44M3 or N63TU3)
530 (N63B44T3 or N63TU3)
Torque output, Nm 600 (O0)
650 (O1, O2, M3)
750 (T3)
Cylinder block aluminum V8
Block head aluminum 32v
Cylinder bore, mm 89
Piston stroke, mm 88.3
Compression ratio 10.0 (except O2)
10.5 (O2)
Features no (O0)
Valvetronic III (except O0)
Hydraulic lifters yes
Timing drive chain
Phase regulator dual-VANOS
Turbocharging yes (O0, O1)
twin-scroll (O2, M3, T3)
Recommended engine oil 5W-30
Engine oil capacity, liter 8.5
Fuel type 98
Euro standards EURO 4/5 (O0)
EURO 5 (O1)
EURO 5 (O2)
EURO 5/6 (M3)
EURO 5/6 (T3)
Fuel consumption, L/100 km (for BMW 750i 2013)
— city
— highway
— combined
13.0
7.2
9.3
Engine lifespan, km ~250 000

Disadvantages of the N63B44 engine

  • This engine has so many problems it would take forever to list them all;
  • First of all, this is an oil burner due to the wear of the valve stem seals and the occurrence of rings;
  • The threads in the soft aluminum cylinder block are weak and the head can rise;
  • Ordinary candles here very quickly fail and misfires begin;
  • After a long stay, you can get a water hammer due to the overflow of piezo injectors;
  • The oil supply pipes to the turbine gradually coke, which reduces their life;
  • The timing mechanism with dual-VANOS and Valvetronic systems has low reliability.

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