Exhaust System - SMART 453 Series Introduction Into Service Manual

M281 exhaust system
Two variants of exhaust system are used to remove the com-
bustion gases of the rear-mounted engine:
• Exhaust system of naturally aspirated engine
• Exhaust system of turbocharged engine
• Exhaust system of naturally aspirated engine for sport
package
• Exhaust system of turbocharged engine for sport package
These exhaust systems differ with respect to their internal
and external design.
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Exhaust system of naturally aspirated engine
1 Catalytic converter
2 Rear muffler
3 Decoupling element
4 Oxygen sensor upstream of catalytic converter
5 Oxygen sensor downstream of catalytic converter
Introduction of the New smart fortwo coupé and smart forfour | Model Series 453
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The exhaust systems consist of:
• Catalytic converter
• Decoupling element
• Rear muffler
Vehicles with sport package feature an exhaust system with
chrome-plated exhaust tip.
1
3
Exhaust system of turbocharged engine
1 Turbocharger
2 Rear muffler
3 Catalytic converter
4 Decoupling element
5 Oxygen sensor upstream of catalytic converter
6 Oxygen sensor downstream of catalytic converter

Exhaust system

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