FixVault

12 90 Control Unit Housing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.
CONTROL UNIT HOUSING - TIGHTENING TORQUES SPECIFICATION

  Type Thread Tightening specification Measure
1AZ Assembly of upper and lower sections E32 / E34 / E36     5 Nm
2AZ Center section to body E32 / E34     3 Nm
3AZ Control unit holder in E box E36     5 Nm
4AZ Control unit box cover E38 / E39 / E52     4 Nm
  E46     6 Nm
  E53 / E36/7 / E54     3 Nm
5AZ Electronics box to firewall E65 Plastic screw   6 Nm