2010 Nissan Altima catalytic information

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replace your O2 oxygen sensor at least every 75k miles and you won't run into catalytic replacement cost at almost 2k or more at the dealership depending on make and model.
I'm doing DIY to save over a thousand
spend a little on maintenance, save thousands .
this my fault, never replaced the O2 sensor over the life of owning this car for 12 years.
key is maintenance