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-0080MCV
ENGINES 132.910 in MODEL 451.3 /4 with CODE (494) USA version O2 sensor upstream of CAT [KAT]
ENGINES 132.910 in MODEL 451.3 /4 as of 31.8.10 except CODE (494) USA version O2 sensor upstream of CAT [KAT]
| Remove/install | |||
| Risk of injury to skin and eyes caused by handling hot or glowing objects. | Wear safety gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 1 | Raise vehicle with vehicle lift | ||
| 2 | Remove bolts (2) and unhook rear apron (1) from brackets (arrows) | ||
| 3 | Support rear muffler (4) using a transmission jack (6) and removal fixture (5) | Transmission jack |
Fig 2 |
| 4 | Unhook rear muffler (4) from the rubber retainers (3) | ||
| 5 | Lower rear muffler (4) with transmission jack (6) and removal fixture (5) until the O2 sensor upstream of CAT [KAT] (G3/2) is accessible | Transmission jack |
Fig 2 |
| 6 | Unclip holder (7) for connector for O2 sensor upstream of CAT [KAT] (G3/2x1) and disconnect connector for O2 sensor upstream of CAT [KAT] (G3/2x1) | ||
| 7 | Unscrew O2 sensor upstream of CAT [KAT] (G3/2) from catalytic converter (1) | ||
| *BA14.00-P-1002-01B | |||
| Paste | *BR00.45-Z-1005-06A | ||
| 8 | Install in the reverse order | ||
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 9 | Perform engine test run and check exhaust system for leakage in area of O2 sensor upstream of CAT [KAT] (G3/2) |
O2 SENSOR
| Number | Designation | Engine 132.9 | |
|---|---|---|---|
| BA14.00-P-1002-01B | O2 sensor upstream of CAT [KAT] to catalytic converter | Nm | 50 |
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.