Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Smart ForTwo Coupe (451.331) L3-1.0L (132.910)FACTORY OEM SERVICE PROCEDURE
AR07.04-P-0080MCI Remove/Install O2 Sensor
AR07.04-P-0080MCI Remove/install O2 Sensor
- ENGINES 132.910 in MODEL 451.3 /4 as of 31.8.10 except CODE (494) USA version
O2 sensor upstream of catalytic converter
1 Socket wrench
G3/2 O2 sensor upstream of catalytic converter
G3/2x1 Connector for O2 sensor upstream of catalytic converter
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.