Component Overview

Fig 1: Identifying Oxygen Sensors And Primary Catalytic Converters

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1 - Pre-cat sensor for cylinders 4, 5 and 6

4 - Pre-cat sensor for cylinders 1, 2 and 3

Fig 2: Identifying Exhaust Manifold And Catalytic Converter

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1 - Exhaust manifold, cylinders 1 to 3

2 - Exhaust manifold, cylinders 4 to 6

3 - Stud

4 - Seal, cylinders 1 to 3

5 - Seal, cylinders 4 to 6

6 - Exhaust manifold nut

7 - Holder

8 - Heat protection panel on exhaust manifold

9 - Sheetmetal clip

10 - Screw

11 - Sheetmetal holder

12 - Primary catalytic converter, cylinders 1 to 3

13 - Primary catalytic converter, cylinders 4 to 6

14 - Seal

15 - Nut

16 - Sheetmetal holder

17 - Screw

18 - Stud

19 - Nut

21 - Screw

27 - Sheetmetal holder

28 - Oxygen sensor ahead of catalytic converter, cylinders 4 to 6

29 - Oxygen sensor ahead of catalytic converter, cylinders 1 to 3

30 - Oxygen sensor behind catalytic converter, cylinders 4 to 6

31 - Oxygen sensor behind catalytic converter, cylinders 1 to 3