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. 

Recommended tools 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. > V.A.G 1331A - Torque wrench, 6-50 Nm/4.5-37 ftlb.  - suitable for 3/8-inch ratchet head
2. >VAS 6947 - Ring Socket Insert, a/f 13 
3. >3337 - Ring wrench set for oxygen sensor  , a/f 22 mm

1. Install oxygen sensor downstream of catalytic converter.
   1. 1.1 Coat the thread with high-temperature grease (see Spare Parts Information).
   2. 1.2 Screw in oxygen sensor and tighten to > Tightening torque 50 Nm (37 ftlb.) +/- 8 Nm (6 ftlb.)  .
   3. 1.3 Tightening torque using recommended tool: 

      Screw in oxygen sensor and tighten to > Tightening torque using the prescribed tool 46 Nm (34 ftlb.)  .

   4. 1.4 Connect electric plug connection and secure connector housing in holder.
   5. 1.5 Fit tie-wrap at the coolant line.
2. Vehicles with particle filter: 

   Secure differential pressure sensor lines -1  -.

   1. 2.1 Position differential pressure sensor lines -1  - and fit union nuts -4  -, but do not tighten yet.
   2. 2.2 Fit and tighten screw for differential pressure sensor lines -3  -.

      > Tightening torque 6 Nm (4.5 ftlb.) 

   3. 2.3 Tighten union nuts -4  -.

      > Tightening torque 12 Nm (9 ftlb.) 

      > Torque angle + 90° 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

3. Vehicles with particle filter: 

   Fit and tighten nuts -1  - on differential pressure sensor lines -2  -.

   > Tightening torque 6 Nm (4.5 ftlb.) 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.