13 62 560 Removing and installing/replacing air mass flow sensor (M54)

WARNING: This page is about a different car, the 2005 BMW 530i, 2005 BMW 525i, 2004 BMW 530i, and 2004 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Make sure your hands are clean.

Avoid contamination by lubricants and greases that contain oil.

Necessary preliminary tasks:

Read out DME fault memory.

Unlock and detach plug connection (1). Loosen screws (2).

Remove HFM sensor (3) in direction of arrow.

Fig 1: Removing HFM Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Grip HFM sensor (1) in upper area only.

Installation:

Pay attention to retaining groove (2).

Check sealing ring (3) for damage and replace if necessary.

Check NTC pellet (4) for contamination and damage.

Fig 2: Checking NTC Pellet

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Avoid contamination of flange geometry (2) by lubricants containing oil and foreign bodies (dust).

Installation:

Pay attention to locating pin (1).

Fig 3: Checking Locating Pin

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.