Partially removing the Lambda oxygen sensor for the cylinders 5 to 8

• Unlatch the plug connection (1)  upwards and disconnect.
• Unlatch the cable from the detents (2)  .

  Courtesy of BMW OF NORTH AMERICA, INC.

• Feed the cable (1)  of Lambda oxygen sensor through the holder of coolant expansion tank.

Courtesy of BMW OF NORTH AMERICA, INC.