A minimum of 1.5 bar of oil pressure is required at idle (engine at operating temprature)

Control oil pressure is between 4 and 6 bar (engine at operating temprature)

N52 Oil pressure specifications N52 oil pressure measurement

At idle, engine at operating temperature

• N52 crankcase vacuum healthy values are between -25 and -35 mbar, with -30mbar being the sweet spot

• N52k crankcase vacuum healthy values are between -28 and -38 mbar, with -33mbar being the sweet spot

N52 CCV

N52 was fitted with Valvetronic (Variable Valve lift) Generation 2

N52 Valvetronic

N52 was fitted with somehow a restricted air filter for maximum safety. An upgrade is the K and N High flow filter. A slightly smoother idle and better torque readiness throughout the whole RPM range are guaranteed

N52 K&N 33-2292 Air filter