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Home >> BMW >> 2002 >> X5 30i, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Body Equipment - Repair Instructions - X5 (4.4L) >> Loose Body Parts >> 51 71 378 Removing and installing/replacing underride protection

51 71 378 Removing and installing/replacing underride protection

Necessary preliminary tasks: 

NOTE: The operation is described on the left side; proceed in the same way for the right side.

Version up to 10/03:

Lever out catches (1) and detach brake air duct (2).

Fig 1: Detaching Brake Air Duct
G03253130Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Fixtures (1) on brake air duct (2) must not be damaged.

Fig 2: Checking Fixtures On Brake Air Duct
G03253131Courtesy of BMW OF NORTH AMERICA, INC.

Build date from 10/03:

Release expansion rivet (1).

Lever out catches (2) and detach brake air duct (3).

Fig 3: Releasing Expansion Rivet
G03253132Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Fixtures (4) on brake air duct (5) must not be damaged.

Left only:

Lever temperature sensor (1) out of fixture (2).

Pull temperature sensor (1) with cable grommet (3) out of brake air duct (5).

Fig 4: Pulling Temperature Sensor
G03253133Courtesy of BMW OF NORTH AMERICA, INC.

All build versions:

Installation: 

Catches (1) on brake air duct (2) must not be damaged.

Fig 5: Checking Catches On Brake Air Duct
G03253134Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts (1) and remove underride protection (2) in direction of arrow.

Fig 6: Removing Underride Protection
G03253135Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Nuts (1) on underride protection (2) must not be damaged.

Fig 7: Checking Nuts On Underride Protection
G03253136Courtesy of BMW OF NORTH AMERICA, INC.