Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Piece of Garbage!

I bought the part from this seller1: Dorman OE Solutions Exhaust Manifold 674-439 Sold by: Amazon.com, LLC, had Midas put in. May 3rd it was installed. November 10 just 6 months later, my engine light on my 98 Honda Civic CX comes on. I have to pay $48 to have mechanic diagnose problem to find I need a NEW exhaust manifold. Now I'm out $167 plus the fee by Midas to have mechanic install. DON'T buy this part. I've left two messages with no response. Amazon said it is seller's responsibility. Dorman says it's seller's responsibility. But seller being Amazon.com LLC results in no replies. PLUS DORMAN is NOT guaranteeing their product like their warranty states it will. Now I have to pay a shop just to get the warranty through them. I asked Dorman if perhaps it's because it didn't have enough Platinum in it, and they replied it has no platinum, which my understanding this part should have. This is a complete rip off and has been a giant headache!!!