Exhaust System; Overview - SMART Series 451 Service Manual

SN_Typ 451_us.book Seite 45 Freitag, 30. November 2007 1:56 13
Design
The exhaust system is made of stainless steel and
consists of the following components:
• Exhaust manifold
• Catalytic converter
• Main muffler

Exhaust system

1 Exhaust manifold
2 Catalytic converter
3 Main muffler
Muffler system
When designing the muffler systems, it was important
both to minimize the exhaust back pressure and
achieve optimum acoustic tuning. The muffler system
is rigidly fixed to the vehicle body.
Exhaust aftertreatment
A control sensor and a diagnostic sensor are installed
for exhaust aftertreatment.
Aftertreatment of the exhaust gases is performed by
a catalytic converter with monolithic coating.
G3/1
G3/2
Introduction of the smart fortwo, Model Series 451

Overview

O2 sensor downstream of TWC [KAT]
O2 sensor upstream of TWC [KAT]
P49.00-2109-00
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