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1990 964 C4 Oxygen Sensor

Engine

Vehicle Information: Year: 1990; Body Type: Cabriolet; Total Mileage: 68000;

My Idle fluctuates at stop signs, the Porsche dealer say's that my O2 Sensor is giong bad and needs to be replaced. Is this a job I can do, I can feel it on top of the cat and see a wire run up thru a grommet into the engine bay. Does it unplug easy?Thanks

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