Installing Oxygen Sensor Downstream Of Catalytic Converter

NOTIFICATION 

Incorrect handling of oxygen sensors 

• Damage to oxygen sensors 
• Different exhaust emission behaviour 
  • → Do not remove the plastic cap on the thread until just prior to fitting.
  • → Protect oxygen sensors from impact of any kind.
  • → Do not kink or twist the cables when screwing in the sensors.
  • → Do not re-use dirty or damaged components.

Information 

• When re-installing oxygen sensors, only grease the thread with lubricant (see PET). 
• Make sure that the lubricant does not get into the slits in the sensor body. 
• New oxygen sensors have already been greased and the thread is fitted with a protection cap. 

Tightening torque using recommended tool 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. > Nr.90 Pos.3 - Torque wrench  - suitable for 3/8-inch ratchet head
2. >Nr.98-1 Pos.3 - Insert adapter with universal joint 
3. >Nr.96-3 - Open ring wrench  , a/f 22 mm

1. Install oxygen sensor upstream of catalytic converter.
   1. 1.1 Coat thread with hot screw grease.
   2. 1.2 Screw in oxygen sensor and tighten to > Tightening torque 50 Nm (37 ftlb.) +/- 8 Nm (6 ftlb.)  .
   3. 1.3 Connect electric plug connection and secure connector housing in holder.
   4. 1.4 Route electric line and fit new tie-wrap.