Special tools required:

WARNING: This page is about a different car, the 2008 BMW 760Li and 2007 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

11 4 050 . See 11 4 050 REDUCER
13 3 061 . See 13 3 060 FIXTURE
13 3 063 . See13 3 060 FIXTURE
13 6 051 . See13 6 050 SET OF ADAPTERS FOR BMW DIS
13 6 054 . See13 6 050 SET OF ADAPTERS FOR BMW DIS

Necessary preliminary tasks:

Check engine oil level.
Remove oil pressure switch. See 12 61 280 REMOVING AND INSTALLING OR REPLACING OIL PRESSURE SENSOR (N73)

NOTE: A small amount of engine oil emerges when oil pressure switch is removed.
Make sure no oil drips onto the belt drive.
Remove any remnants of oil immediately.

Remove oil pressure switch.

Installation:

Tightening torque 12 61 1AZ. See 11 61 INTAKE MANIFOLD

Install adapter 11 4 050 with sealing ring. See 11 4 050 REDUCER

Fig 1: Identifying Adapter (11 4 050) With Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Check engine oil pressure with DIS Tester.

Attach special tool 13 6 054 with sealing ring (1) and special tool 13 6 051 and connect to DIS Tester. See 13 6 050 SET OF ADAPTERS FOR BMW DIS

Check engine oil pressure with pressure gauge.

Install special tools 13 3 063 and special tool 13 3 061 (pressure gauge). See 13 3 060 FIXTURE

Start engine and check engine oil pressure.

Specified value, refer to table.

Fig 2: Identifying Special Tools (13 3 063 And 13 3 061)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.