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 Passion, 2D ConvertibleFACTORY OEM SERVICE PROCEDURE
Remove/install knock sensor - AR15.12-P-2185MCU
ENGINE 132.910 in MODEL 451.3/4
| Remove/install | |||
| Risk of death caused by vehicle slipping or toppling off 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 | Disconnect electrical connector (1) at knock sensor (A16) | ||
| 3 | Unscrew screw (2) and remove knock sensor (A16) | *BA15.12-P-1001-01G | |
| 4 | Install in the reverse order | ||
| 5 | Read out fault memory, erase if necessary | When installing new a knock sensor (A16). | |
| Connect STAR DIAGNOSIS and read out fault memory | AD00.00-P-2000-04MCC |
ECI IGNITION SYSTEM
| Number | Designation | ENGINE 132.9 | |
|---|---|---|---|
| BA15.12-P-1001-01G | Bolt, knock sensor to crankcase | Nm | 20 |
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.
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