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Vauxhall Owners Club

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  1. The sensors do not have to be original equipment but of reputable quality which Bosch are.

    The only other thing to check is if there are exhaust leaks that are causing the sensors to run high on Lambda.
    Put a rag over the exhaust pipe with the engine running (outside in fresh air of course) and listen for any hissing which would indicate an air leak

  2. By swapping the sensors around and the same one still comes up with the fault suggests its not the sensor that is faulty,
    I would be tempted to look at the connector and wiring for that sensor (vehicle side not sensor side connectors)

  3. I would recommend anything that is manufactured in UK or Europe, obviously avoid the cheap options as they are cheap for a reason.

    I guess you could source the parts yourself and get the garage to fit the new ones, especially if they have failed in less than a year they would fit it cheaper for you

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