All auto parts sold have the manufactorers warranty in effect.  To return an item you must  call our Toll Free number 888-818-2636 for a return authorization.  We can not accept any returns on electrical items, sensors or computer related items.  If an item is returned with  visible installation marks no credit can be issued.  If you feel that an item is defective please use our Toll Free number or email us at customerservice@SCAutoOnline.com   If you receive an item and want to return it, you must email us or call us with your circumstance.  All itms must be shiped back to our Returns Department.  Buyers are responsible for returns at their own expense.  Special order items are not returnable.