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Exhaust system
Naturally aspirated and turbocharged engines
Design
The exhaust system is made of stainless steel and consists of the following components: Gasoline engine without turbocharger: • Exhaust manifold • Connecting pipe • Main muffler Gasoline engine with turbocharger: • • • • Exhaust manifold Turbocharger Connecting pipe Main muffler Vehicles with gasoline engine are fitted with a control sensor and a diagnostic sensor. Only a control sensor is installed in vehicles with diesel engine. The exhaust gases are aftertreated by the catalytic converter integrated in the main muffler.
Muffler system
When designing the muffler systems, it was impor tant both to minimize the exhaust back pressure and achieve optimum sound tuning. In contrast to the predecessor model series, the muffler system is now rigidly mounted on the vehicle.
Exhaust gas aftertreatment
Diesel engine: • Exhaust manifold with turbocharger • Main muffler
P49.00-2107-00-00
Exhaust system (gasoline engine with turbocharger)
1 Exhaust manifold 2 Turbocharger 3 Main muffler with integrated catalytic converter
G3/1 G3/2
O2 sensor downstream of TWC [KAT] O2 sensor upstream of TWC [KAT]
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Introduction of the smart fortwo, Model Series 451
– This printout will not be recorded by the update service. Status: 03 / 2007 –