Removal & Installation1.6L (W10 And W11) Engines
Before beginning, always make sure to communicate with the fault memory with a BMW DIS (or equivalent OBD-II scan tool) for existing faults. It may be helpful to print out the results. Once the installation is complete, rerun the scan and correct the remaining faults.
Make sure that all electrical accessories are off and the ignition is switched off.
Remove the heat shield.
Detach the connector from the retaining clips.
Fig. The plug connectors and the retaining clips
Remove the oxygen sensors from their respective positions upstream and downstream.
Fig. The upstream oxygen sensor (1) and the downstream oxygen sensor (2)
The threads of a new oxygen sensors are already coated with an anti-seize compound. If an oxygen sensor is to be used again, apply a thin and even coat of an anti-seize compound to the thread only.
Do not clean the oxygen sensor section which protrudes into the exhaust line and ensure that it avoids all contact with any lubricants.
Observe cable routing of the oxygen sensor so it doesn-t interfere with any other system or the exhaust pipes.
Replace the oxygen sensors in their respective positions upstream and downstream.
Attach the connector to the retaining clips.
Replace the heat shield.
Check for any remaining faults. Rectify them and clear the fault memory.