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.
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HOMESERVICE MANUALSBMW2006323I AUTOMATICREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSPOWERTRAIN - OVERVIEWE90 POWERTRAINENGINEENGINE MANAGEMENT (MSV70)MSV70 SYSTEM OVERVIEW
2006 BMW 323i Automatic
MSV70 System Overview
2006 BMW 323i AutomaticSECTION MSV70 System Overview
LEGEND FOR MSV70 SYSTEM OVERVIEW
| Index | Explanation | Index | Explanation |
|---|---|---|---|
| 1 | DME (ECM) | 38 | Diagnosis connection |
| 2 | Integral ambient temperature sensor | 39 | Valvetronic relay |
| 3 | Integral ambient pressure sensor | 40 | Oxygen Sensor |
| 4 | DME (ECM) main relay | 41 | Oxygen Sensor |
| 5 | DM-TL | 42 | Oxygen Sensor |
| 6 | IHKA | 43 | Oxygen Sensor |
| 7 | Electric engine cooling fan | 44 | Valvetronic motor |
| 8 | E-Box fan | 45 | Knock sensor (cyl 1-3) |
| 9 | Characteristic map thermostat | 46 | Knock sensor (cyl 4-6) |
| 10 | Crankcase ventilation heater | 47 | Eccentric shaft sensor |
| 11 | Crankcase ventilation heater relay | 48 | Hot-film air mass meter (HFM) |
| 12 | Secondary air pump | 49 | Exhaust camshaft sensor |
| 13 | Secondary air pump relay | 50 | Intake camshaft sensor |
| 14 | HFM for Secondary air | 51 | Crankshaft sensor |
| 15 | Fuel tank vent valve (TEV) | 52 | DISA actuator |
| 16 | VANOS solenoid valve (Intake cam) | 53 | DISA Actuator |
| 17 | VANOS solenoid valve (Exhaust cam) | 54 | Electric Throttle Valve (EDK) |
| 18 | Electro-magnet for airflap control (not for US) | 55 | Accelerator Pedal Module (FPM) |
| 19-24 | Fuel injectors | 56 | SPORT button |
| 25 | Fuel injector relay | 57 | Coolant temperature sensor (engine temp) |
| 26-31 | Ignition coils | 58 | Coolant temperature sensor (radiator outlet) |
| 32 | Electric coolant pump | 59 | DSC module |
| 33 | Intelligent Battery Sensor (IBS) | 60 | Brake Light Switch (BLS) |
| 34 | Alternator | 61 | Clutch switch |
| 35 | Oil Condition Sensor (OZS) | 62 | Car Access System (CAS) |
| 36 | Ground connection | 63 | Differential pressure sensor |
| 37 | PT-CAN | 64 | Oil pressure switch |
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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.