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Home >> Audi >> 1991 >> 200 Base >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Oxygen (O2) Sensor >> Removal & Installation
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Removal & Installation

Oxygen (O2) sensor is mounted in the exhaust pipe in front of catalytic converter. Disconnect permanent pigtail from sensor. Ensure sensor is free of contaminants, avoid using any cleaning solvents. Sensor may be difficult to remove when engine temperature is less than 118°F (48°C). Always use anti-seize compound on threads before installation. Tighten sensor to specification. See TORQUE SPECIFICATIONS table at the end of article.