The Opel Cora OPC is a really bad car.

Opel Corsa OPC engine replacement and turbo replacement. I was told that the balance of my warranty would apply on a new engine and turbo due to a manufacturer fault. The car was with the dealership for close to two months. I've had it back for a week and now it's back with a different dealership. I'm not sure whether it's a dealership workmanship issue or are the engines really that bad. I am pursuing the matter further.