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 MANUALSAUDI2007S8REPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEM5.2L - FUEL INJECTION IGNITION, ENGINE CODE(S): BSM
2007 Audi S8
5.2L - Fuel Injection Ignition, Engine Code(S): BSM
2007 Audi S8SECTION 5.2L - Fuel Injection Ignition, Engine Code(S): BSM
- 24 - Multiport Fuel Injection (MFI)
- Safety measures and cleanliness rules
- Fuel injection system
- Technical data
- Component locations overview
- Engine compartment, right
- Engine compartment, left
- Location of Engine Control Module (ECM) J623 and Engine Control Module (ECM) 2 J624
- 5-pin relay carrier in passenger footwell
- Relay and fuse holder behind left instrument panel
- Relay- and fuse holder, in luggage compartment, right side
- 4-pin relay carrier in E-box plenum chamber
- Low Fuel Pressure Sensor G410, Evaporative Emission (EVAP) Canister Purge Solenoid Valve N80, Throttle Valve Control Module 2 J544 & Throttle valve control module J338
- Intake Air Switch-Over valve N335
- Engine viewed from rear
- Engine Speed (RPM) Sensor G28
- Engine viewed from front
- Location inside cylinder head
- Oxygen sensors before catalytic converter
- Oxygen sensor locations
- Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) G287
- Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130
- Secondary Air Injection (AIR) Pump Motor V101 (below right longmember)
- Air filter, assembly overview
- Right air filter insert (cylinder bank 1), removing and installing
- Left air filter insert (cylinder bank 2), removing and installing
- Mass Air Flow (MAF) Sensor G70 (cylinder bank 1), removing and installing
- Mass Air Flow (MAF) Sensor 2 G246 (cylinder bank 2), removing and installing
- Intake manifold, assembly overview
- Intake manifold, removing and installing
- Fuel injections and fuel rail, component overview
- High pressure pump, component overview
- High pressure pumps, removing and installing
- Fuel injectors, removing and installing
- Fuel pressure and residual pressure before high pressure pump, checking
- Oxygen sensor, assembly overview
- Oxygen sensors G39 , G131 , G285 , G288 , removing and installing
- Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) G287 , removing and installing
- Heated Oxygen Sensor (HO2S) 2 G108 and Heated Oxygen Sensor (HO2S) 4 G286 , removing and installing
- Engine Control Modules (ECM)
- 28 - Ignition/Glow plug System
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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.