BMW N55 - Catalytic Converter

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N55 Engine
Catalytic Converter
Two ceramic honeycomb structures are contained in the catalytic converter housing.
The catalytic converter has a volume of 2.7 liters. Depending on the type of vehicle the
ceramic structures have different coatings.
Ceramic structure 1 has a volume of 1.2 liters, a diameter of 125 mm, and
contains 600 cells.
Ceramic structure 2 has a volume of 1.5 liters, a diameter of 125 mm, and
contains 400 cells.
Index Explanation Index Explanation
1
Oxygen sensor upstream of catalytic converter
4
Catalytic converter outlet funnel
2
Connection to the turbocharger
5
Ceramic structure 2
3
Ceramic structure 1
6
Oxygen sensor after ceramic structure 1
N55, catalytic converter