I have had ongoing issues with my 05 STi currently around 18,500 miles. I started to notice a strange idle and jerking form the motor could be felt through the seat at idle once the car was fully warmed up. I took to the dealership on two occasions and they stated that there was nothing wrong with the car. Being frustrated with this I sent an email to dealer relations at Subaru. I was contacted shortly and set up another time to take my car back to the dealership. After a compression test they found that cylinder #4 was off. They tore the motor down and found that the 4th piston was actually the wrong one. It was stated as A and B piston, A piston was put in the motor from the factory and should have been B piston or vise versa. I have had the car for a several weeks now and the idle issue is back and even worse.
I honesty have not been to happy with Subaru i.e. the manufacturer, I have felt as if the customer service rep in dealer relations just doesn***8217;t care about my issue. I had asked for my warranty to be extended after I got my car back and that was denied. I have not had any type of apology or explanations of quality control from Subaru. After a quick visit at the dealership yesterday and speaking to the service manager I will be taking the car back on Wednesday. Please note this car is bone stock and I have never been modded. Has any one had an issue of this nature?