13 31 029 Checking fuel feed pressure (N53, N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 6 030
13 5 270
11 4 310
11 5 364
13 3 060

See FUEL SYSTEM - SPECIAL TOOLS .

Necessary preliminary tasks:

Connect DIS Tester.
Remove front underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION (CONVERTIBLE) or 51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION (COUPE) .

IMPORTANT: Lines are under pressure.

Recycling:

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

Unscrew nuts (1). Remove guard plate (2).

Fig 1: Identifying Protective Plate And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Remove circlip (1). Disconnect fuel line (2) from snap fastener and unclip from bracket.

Fig 2: Disconnecting Fuel Line From Snap Fastener

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew adapter (1) from special tool 13 5 270.

Fig 3: Unscrewing Adapter From Special Tool (13 5 270)

Courtesy of BMW OF NORTH AMERICA, INC.

Insert special tool 13 5 270 between fuel lines (1). Screw onto special tool 13 5 270, the special tool 11 4 310. Screw IMIB 100 bar pressure sensor (2) on the special tool 11 4 310.

Fig 4: Inserting Special Tool (13 5 270) Between Fuel Lines

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: As an alternative to the 100 bar IMIB pressure sensor (1), the 25 bar pressure sensor can also be used. For this, screw on special tool 11 5 364 instead of special tool 11 4 310 into special tool 13 5 270. Or directly screw the pressure manometer from the set of special tools 13 3 060 onto the special tool 13 5 270.

Establish fuel delivery pressure. Read off fuel delivery pressure on IMIB and compare with values in diagnosis system.

Assemble engine. Check fuel system for tightness.