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  1. 2.3L I-4
    Hello All! So i have an 05 M6 I 2.3L hatch and yesterday received news that i am going to need a new catalytic converter. I purchased the car used and upon purchase was told it would need an Bank 1 O2 sensor. However, the check engine light for this replacement would turn off on its own so i was...
  2. 3.7L V6
    Hi there, I have a 2009 Mazda 6 3.7 v6. It has about 145,000 miles on it. Car is sounding louder normal. Could this be a bad cat or leak in the manifold. I’m attaching a picture of the O2 readings, I was told that the output should be constant and not jumping around like the first sensor...
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