Special tools required:

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

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Necessary preliminary tasks:

Unscrew and remove splash guard.
Remove fan impeller with fan clutch and fan cowl. Refer to WATER PUMP WITH DRIVE .
E83/E85/E60: Remove fan cowl with electric fan. Refer to 17 11 031 REPLACING FAN COWL (M54) .
Remove A/C compressor drive belt. Refer to 11 28 050 Replacing A/C compressor drive belt (M52 / S52 / M52TU / M54 / M56) .
Remove alternator drive belt. Refer to 11 28 010 Replacing alternator drive belt (M52 / S52 / M52TU / M54 / M56) .

IMPORTANT: Risk of damage.

Protect cooler against damage.