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.
13 62 651 Replacing control sensor (M57T2)
Special tools required:
Necessary preliminary tasks:
- Read out fault memory of DDE control unit; if necessary, work through test schedules
- Switch off ignition
- E83 only: Release windscreen washer fluid reservoir
Only perform this task on an engine that has cooled down.
Unlock plug connection and pull out of guide.
Unlock plug (1) and remove.
Unclip cable.
Release oxygen sensor (1) with special tool 11 7 020 .
Installation:
Tightening torque: 11 78 1AZ .
Installation:
Threads of new oxygen sensors are already coated with Never Seez Compound.
If an oxygen sensor is reused, only apply a thin and uniform coat of Never Seez Compound to thread.
Oxygen sensor section projecting into exhaust system branch must not be cleaned or come into contact with lubricant.
Pay attention to cable routing of oxygen sensors.
Cover oxygen sensors when applying underseal.
Installation:
Now clear the fault memory.
NO RELATED
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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.