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 MANUALSAUDI2004A8REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM4.2L - ENGINE MECHANICAL, ENGINE CODE(S): BFM26 - EXHAUST SYSTEM, EMISSION CONTROLSEXHAUST SYSTEM COMPONENTS, REMOVING AND INSTALLINGLEFT EXHAUST MANIFOLD, REMOVING AND INSTALLING
2004 Audi A8
Left exhaust manifold, removing and installing
2004 Audi A8SECTION Left exhaust manifold, removing and installing
Removing
- Remove engine → Engine, removing and installing .
- Free up Heated Oxygen Sensor (HO2S) 2 G108 electrical wire.
- Remove catalytic converter with front muffler from exhaust manifold - arrows -.
Fig 2: Disconnecting Electrical Connector (Brown) Of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 And Free Up Electrical Wire
- Disconnect electrical connector - 3 - (brown) of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 and free up electrical wire.
- Remove bolt - arrow - on bracket for exhaust pipe.
NOTE:
- Flex joint in front exhaust pipe must not be bent more than 10° , otherwise it may be damaged.
RENDER: 1.0x
NO RELATED
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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.