13 31 029 Check fuel delivery pressure (N51, N52, N52K)

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 5 220
13 5 221
13 5 222
11 4 310

IMPORTANT:

The fuel in the fuel lines is under pressure.

Catch and dispose of escaping fuel.

Necessary preliminary tasks:

Switch off ignition.
Remove acoustic cover.

Fig 1: Locating Acoustic Cover Screws

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Unclip connector (1) from bracket (2). Unclip bracket (2) from fuel injection pipe.

Fig 2: Identifying Plug Connection And Holder

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Remove dust cap (1).

Fig 3: Identifying Dust Cap

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Procedure with the 25 bar pressure sensor:

Connect the set of special tools 13 5 220 (consisting of 13 5 221 and 13 5 222) to the pressure sensor of the BMW diagnosis system.

Connect pressure sensor to the BMW diagnosis system or IMIB.

Fig 4: Special Tools (13 5 221) And (13 5 222)

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IMPORTANT: Do not under any circumstances screw in the check valve up to the mechanical stop.

This could damage the valve in the pressure regulator housing.

Install set of special tools 13 5 220 at injection pipe and tighten knurled nut hand-tight.

Unscrew shutoff valve (1) so that valve in pressure regulator housing is closed.

Establish fuel delivery pressure.

Screw in shutoff valve (1) until a pressure reading is displayed on BMW diagnosis system or IMIB. Read off fuel delivery pressure and compare with values in BMW diagnosis system.

Fig 5: Check Valve And Special Tool Kit (13 5 220)

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Procedure with the 100 bar IMIB pressure sensor:

For the check of fuel delivery pressure with the 100 bar IMIB pressure sensor only tool 13 5 221 is needed from the set of special tools. Unscrew special tool 13 5 222 from special tool 13 5 221.

Fig 6: Identifying Special Tool

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Install special tool 13 5 221 at fuel injection pipe and tighten knurled nut hand-tight.

Unscrew shutoff valve so that valve in pressure regulator housing is closed.

Screw onto special tool 13 5 221, the special tool 11 4 310.

Screw IMIB 100 bar pressure sensor on the special tool 11 4 310.

Establish fuel delivery pressure.

Screw in shutoff valve until a pressure reading is displayed on IMIB. Read off fuel delivery pressure and compare with values in BMW diagnosis system.

Fig 7: Installing Special Tools

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NOTE: Removal of the set of special tools 13 5 220:

Stop engine.
Fully unscrew shutoff valve
Remove set of special tools 13 5 220 from pressure regulator housing
Catch and dispose of escaping fuel

NOTE:

Read out the fault memory of the DME control unit.

Check stored fault messages.

Delete fault memory.