Exhaust Emission System - N14: Notes

The 4-cylinder gasoline engine N14 complies with the exhaust emission regulations EURO 4 or LEVII in the US version (LEV = Low Emission Vehicle). The engine has an engine-proximate catalytic converter. In the US version, there is an additional catalytic converter on the underbody.

Two oxygen sensors are deployed for oxygen-sensor control. A broadband oxygen sensor (Bosch: type LSU 4.9) serves as the control sensor before the engine-proximate catalytic converter. A jump sensor (NTK: type FLO) serves as monitor sensor after the catalytic converter.