To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
Had to replace gaskets on my 2008 323i due to a failed vvt sensor that has been replaced. These new gaskets were warped, they did not seal the valve cover as they should. As a consequence, oil started to leak slowly and the idle was totally rough due to vacuum leaking. Had to replace these gaskets with other ones. Total waste of money.