12 63 520 Replacing main relay (M62, M54)

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Switch off ignition.

Connect DIS Tester.

Detach sealing strips (1).

Fig 1: Detaching Sealing Strips

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Turn tommy bar through approx. 90°.

Remove cover.

Fig 2: Removing Cover

G03230550

Courtesy of BMW OF NORTH AMERICA, INC.

Release lock (1).

Remove air funnel (2) towards top.

Fig 3: Removing Air Funnel

G03230551

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws.

Remove cover (1) on control unit box.

Fig 4: Removing Cover On Control Unit Box

G03230552

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Installation:

Insert fixtures (1) of cover for control unit box in openings (2).

Fig 5: Inserting Fixtures Of Cover For Control Unit Box In Openings

G03230553

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Order:

Main relay of Digital Motor Electronics.
Engine fuses of Digital Motor Electronics.

Fig 6: Identifying Main Relay And Engine Fuses Of Digital Motor Electronics
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Notes On Troubleshooting:

If the starter motor cranks the engine during the starting sequence but the engine fails to fire, then:

Check engine fuses.
If fuses are blown, replace them completely with fuse holder.
Find out why fuses have blown.
Continue troubleshooting as per DIS instructions.