Exhaust System: Introduction

> N73

The exhaust system on the previous N62 engine has been adapted for the N73 engine

> N73TU with introduction 09/2006

The N73TU satisfies the legal emissions limits, e.g. Euro 4 standard for Europe or LEV II for the USA (LEV: Low Emission Vehicle).

Measures on the exhaust system:

• new oxygen sensors

• 2 control sensors upstream of catalytic converter (LSU 4.9)
• 2 monitor sensors downstream of catalytic converter (LSF 4.2)