After having purchased and used several products, with success, exactly a year ago I bought a #1 O2 sensor for my car. I called to discuss the part I needed, to insure I got the right one, and placed my order, using a credit card. The part arrived and I installed it. Over the course of the next few months, I periodically got a check engine light, for that #1 O2 sensor. It didn't happen often, I have a means of clearing the error code, and my car ran well enough, so I thought nothing of it. That all changed recently when my car suddenly refused to hold a set speed, would not accelerate properly, misfired, sucked gas, the transmission shifted in and out of gears erratically, and the transmission jumped into overdrive, for no reason. I thought my car was tearing itself apart! I made it to my mechanic, who said he thought the throttle position switch (TPS) had failed. He couldn't get to it right away and suggested I get the part and give it a go. Since my car has 200k with the original throttle assembly, I ordered a remanufactured unit, with the controls that mount to it. This was $200. I installed this part and the car ran well that day. Over the course of the next few days, it either ran well or hardly got out of its own way. My daughter needed the car to attend college, so I had to get it fixed. Brought it back to my mechanic and told him to just FIX IT. He ran diagnostics and everything pointed to that #1 O2 sensor. He purchased a new one from and installed it. PROBLEMS SOLVED! My mechanic billed $100 labor and $207 for the new O2 sensor. Normally, I would have contacted 1A Auto, told them my O2 sensor was defective, and requested a replacement. BUT, we weren't SURE that ALL the different problems I was experiencing were caused by a single, defective O2 sensor, until my mechanic installed a NEW one. Also, literally, my car was tearing itself apart and my daughter has been allowed to take her college classes, on line, thanks to COVID19. But, her professors WANT HER BUTT BACK ON CAMPUS! I did not have the luxury of going the usual, slow route. With the vehicle fixed, I contacted 1A Auto, explained what happened, and requested that they take the defective O2 sensor back, and refund my $67.55 original purchase cost. NO. According to their "customer service", there is a NINETY DAY window for returning an item for a refund. AND, if the item's package has been OPENED, it is assumed the item has been INSTALLED, and it is NOT subject to a REFUND. Of course, THIS was NOT in the paperwork that accompanied my order when I received it. THIS also was NOT explained to me, when I placed my order by telephone. "Customer service" tells me that those juicy little details can be found on the company website. What IS on the invoice that accompanied my order is the following: "For a no-hassle return visit; http//www.1aauto. Com/returns/". I contacted 1A Auto, for a "no-hassle return" and refund, on a part, which they say was subjected to rigid quality control tests, but which lasted only ONE YEAR and which, when it failed catastrophically, caused me to incur over $500 in repair costs! Yet 1A Auto REFUSES to issue a simple $67.55 refund, after I shelled out in excess of $500, in trying to resolve problems caused by one of ITS PARTS, which failed prematurely, with catastrophic results. 1A Auto LOST my business for good. While I will not urge others not to do business with these people, I will urge that you ASK QUESTIONS, READ ALL of the FINE PRINT THOROUGHLY, KNOW FULLY what you are getting yourself into, when you spend your money with these people. They pretend to "do business the old fashion way, when a man's handshake meant something". I learned otherwise.