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Thread: After Catalyst O2 sensor connection

  1. #1
    Junior Member
    Join Date
    Oct 2005

    After Catalyst O2 sensor connection

    1) If I had my catalytic converter replaced with a resonator, would an O2 sensor after catalyst still help my engine performance or it will be useless?

    2) I have a Universal Bosch O2 sensor after catalyst but I don't have the OEM connector anymore. Since it is just 4 wires to connect, does anyone know which wire goes to which terminal? This obviously depends on answer to Q1.

  2. #2
    Senior Member
    Join Date
    Jul 2005
    SF Bay Area
    I may be no help but I do have a O2 Sensor (after cat) BNIB...
    1997 C280 Sport

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