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Header install - Oxygen sensor harness not long enough bank 2 sensor 1

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    Header install - Oxygen sensor harness not long enough bank 2 sensor 1

    Hey guys,

    I installed some Custom Performance (bimmerworld) headers on my M3. The bank 2 Sensor 1 wiring harness on the sensor is not long enough. The Original location of this sensor is up above the cats. Now its almost all the way down by Section 2 where the pipes merge. I am about 4" short. I should be able to remove the engine harness connector and pull it down to work. But preferably would use a longer sensor. Anyone know if there is a compatible longer sensor? I was considering using BMW #11 78 1 406 621 which is the bank 1 POST cat sensor. Not sure if these are all the same sensors besides the connector and length? Anyone have a work around for this?

    #2
    Maybe you have sorted this out, but if you have not have a look here: https://nam3forum.com/forums/forum/m...n-sensor-guide

    Old, not obsolete.

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