Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 BMW 335xi AutomaticFACTORY OEM SERVICE PROCEDURE
12 90 Control Unit Housing
CONTROL UNIT HOUSING TIGHTENING 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 | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.