Original review updated by user Nov 11, 2020 I purchased a catalytic converter for my Mazda. After installing, the check engine light indicating a bad converter came on. We checked all components associated with it, changed an 02 sensor, and still the same code. I actually took the car to a Japanese car specialty shop, and they condemned the converter, as well. Carparts.com won't return emails. Terrible customer service, but they will take your money so fast it will make your head spin. User's recommendation: Beware, try to buy local so that you don' t have to worry about their return policy, (which is dependent on how they feel, not if the part is actually defective).