11 40 000 Checking engine oil pressure (N55)

Special tools required :

IMPORTANT: The regulated oil pump can only be checked and measured with the diagnosis system.
Vehicles with a regulated oil pump have a HYDRAULIC VALVE fitted.
Diagnosis path:

DME Digital Motor Electronics
Complete vehicle
Power train
Engine electronics
Engine oil
Oil-pressure control

Special tool 11 9 250 must be converted for N55

Necessary preliminary tasks :

Connect BMW diagnosis system to vehicle.
Observe diagnosis instructions.
Protect drive belt against dirt
Have a cleaning cloth ready to catch escaping oil

Secure special tool 11 9 250 at hexagon head in a vice.

Release insert (2) using a slotted screwdriver (1) in direction of arrow.

Fig 1: Securing Special Tool In Vice And Releasing Insert Using Slotted Screwdriver

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Release screw piece (1) on special tool 11 6 410 .

Fig 2: Identifying Special Tool (11 6 410) And Screw Piece

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Install special tool 11 6 410 in special tool 11 9 250 .

Insert central bolt with a slotted screwdriver (1) hand-tight.

Fig 3: Inserting Central Bolt With Slotted Screwdriver

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Insert screw piece (1) hand-tight in direction of arrow on special tool 11 6 410 .

Fig 4: Inserting Screw Piece On Special Tool (11 6 410)

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Release oil filter cover with special tool 11 9 240 .

Tightening torque: 11 42 1 AZ .

Fig 5: Releasing Oil Filter Cover With Special Tool (11 9 240)

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Carefully detach filter element.

Installation note :

Check all O-rings for damage, replace if necessary.

Fig 6: Identifying Oil Filter Element And O-Rings

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Install filter element (1) in special tool 11 9 250 .

Installation note :

Coat O-ring with engine oil.

Fig 7: Installing Filter Element In Special Tool (11 9 250)

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Order number for special tool: Bolt 2 212 823 with 11 4 310 .

Screw the pressure sensor (1) hand tight.

Apply light coating of oil to sealing ring at pressure sensor (1) 100 bar.

Fig 8: Identifying Special Tools And Pressure Sensor

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Measure the engine oil pressure with diagnosis system .

Order number for special tool: Screw 2 212 823 to oil filter housing.

Special tool 11 4 310 on special tool, order number: 2 212 823 .

Screw in pressure sensor (1) 100 bar at special tool 11 4 310 (finger-tight).

Connect cable (2) of IMIB (Integrated Measurement Interface Box) to pressure sensor (1) 100 bar.

Graphic shows N20.

Fig 9: Connecting IMIB Cable To Pressure Sensor

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Start engine and check engine oil pressure by means of diagnosis.