Engine Porsche M48.50

The German company assembled the 4.5-liter Porsche M48.50 turbo engine from 2002 to 2007 and put it on the pre-styling version of the first generation Cayenne crossovers in the back of the 955. This engine is famous for the frequent formation of scuffing in the cylinders due to the poor Alusil coating.

Engines of M48-line: M48.00, M48.50, M48.01, M48.51, M48.70.


Production years 2002-2007
Displacement, cc 4511
Fuel system distributed injection
Power output, hp 450 – 520
Torque output, Nm 620 – 720
Cylinder block aluminum V8
Block head aluminum 32v
Cylinder bore, mm 93
Piston stroke, mm 83
Compression ratio 9.5
Features no
Hydraulic lifters yes
Timing drive chain
Phase regulator on the intake shafts
Turbocharging IHI RHF5H
Recommended engine oil 5W-40
Engine oil capacity, liter 8.5
Fuel type petrol
Euro standards EURO 4
Fuel consumption, L/100 km (for Porsche Cayenne Turbo 2004)
— city
— highway
— combined
Engine lifespan, km ~200 000
Weight, kg 253

The engine was installed on:

  • Porsche Cayenne 1 (9PA) in 2002 – 2007.

Disadvantages of the Porsche M48.50 engine

  • The main problem with this turboset is the formation of scoring in the cylinders;
  • Most often, bad fuel or oil is to blame, as well as driving on a cold engine;
  • Antifreeze leaks often occur due to burst pipes and expansion tank;
  • With very active operation, the hot part of the turbines can crack up to 100,000 km;
  • Weaknesses here also include ignition coils, starter, thermostat and pump.

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