246919 Removing and installing oxygen sensor

WM 246919 Removing and installing oxygen sensor

Tools





Technical values





Preliminary work

1. Raise the bonnet. Move bonnet to service position using bonnet stay 9704.
2. Put on the protection covers.
3. Remove engine compartment trim panels on the right. -> 700219 Removing and installing front trim (engine compartment) - section on "Removing"

Information

Assembly overview





Assembly overview for catalytic converters





Installing oxygen sensors upstream of catalytic converter

Information

After installing the oxygen sensor cables, use the PIWIS Tester 9718 to check that the oxygen sensors have not been interchanged. Release the oxygen sensor cable so that the cable can turn when you unscrew or screw in the sensor. Otherwise, the Check Engine light will come on and there may be a change in the vehicle's exhaust gas behaviour.

1. Carefully coat the thread of the oxygen sensors -1- with 000.043.207.07 and screw in by hand.





Installation position of oxygen sensors





Removing and installing oxygen sensors





Special tools for oxygen sensors





Screw in both oxygen sensors upstream of the catalytic converter using a ring or open-ended wrench (a/f 22) or using open-end ring wrench Nr.96-3 or open-end ring wrench Nr.98.
=> Tightening torque: 50 Nm (37 ftlb.)
2. Route cables for oxygen sensors => Cable plugs on oxygen sensors. Connect oxygen sensors.





Cable plugs on oxygen sensors

Subsequent work

1. Install engine compartment trim panels.
-> 700219 Removing and installing front trim (engine compartment).
2. Secure bonnet using original bonnet stay and close it.