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 PureFACTORY OEM SERVICE PROCEDURE
Mixture Formation - 451 Chassis
- Basic Knowledge
- Safety Precautions
- Testing & Repair
- Remove fuel distributor with injection valves - AR07.03-P-1450MCU
- Remove/install injection valves - AR07.03-P-6522MCU
- Remove/install O2 sensor
- Remove/install intake manifold pressure sensor - AR07.04-P-0100MCU
- Remove/install injection system control unit - AR07.08-P-7008MCU
- Remove/install throttle valve actuator - AR07.61-P-1401MCU
- Torque Specifications
- Wiring Diagrams
- Electrical function schematic for thermal management - PE07.10-P-2712MEX
- Wiring diagram - ME-SFI fuel injection and ignition system
- Electrical function diagram for engine control ME-SFI [ME]
- Wiring diagram for engine electronics - electronic accelerator - transmission (MEG) with clutch - PE07.61-P-2200MCC
- Special tools
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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