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-0080MCV Remove/Install O2 Sensor
AR07.04-P-0080MCV Remove/Install O2 Sensor
- O2 sensor upstream of TWC
1 Rear apron
2 Screw
3 Retaining rubber
4 Rear muffler
5 Removal assembly
6 Transmission jack
7 Bracket
8 Catalytic converter
G3/2 O2 sensor upstream TWC
G3/2x1 Connector for O2 sensor upstream of TWC
450 589 02 62 00, Removal assembly
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.