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.
2009 Smart Fortwo PureFACTORY OEM SERVICE PROCEDURE
Remove/install O2 sensor - AR07.04-P-0080MCU
ENGINE 132.910 in MODEL 451.3 /4 O2 sensor downstream of TWC
| Remove/install | |||
| 1 | Remove complete exhaust system | AR49.10-P-7000MCU | |
| 2 | Unscrew O2 sensor downstream of catalytic converter (G3/1) from catalytic converter (1) | ||
| *BA14.00-P-1003-01B | |||
| Paste | *BR00.45-Z-1005-06A | ||
| 3 | Install in the reverse order |
O2 SENSOR
| Number | Designation | Engine 132.9 | |
|---|---|---|---|
| BA14.00-P-1003-01B | O2 sensor downstream TWC on catalytic converter | Nm | 40 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1005-06A | Paste, hot lubrication 1 kg, DB supply specification 6879.20 | A 000 989 76 51 |
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.