18 40 050 Removing and installing/replacing front exhaust manifold (N52/N52K/N51)

Necessary preliminary tasks:

NOTE: The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove Control Sensor from cylinders 1 to 3.

Remove Monitor Sensor from cylinders 1 to 3.

Unscrew nuts.

Remove exhaust manifold (1).

Installation:

Clean sealing faces and replace seals.

Replace nuts.

For tightening torque refer to 18 40 1AZ in 18 40 EXHAUST MANIFOLD

Fig 1: Identifying Exhaust Manifold

Courtesy of BMW OF NORTH AMERICA, INC.