Our customer support is available Monday to Friday. Your questions will be answerred within 24 hours. All messages received during the weekends or holidays will be answerred on the next business day. Please do not hesitate to contact us with any queries, our trained staff will be happy to assist you. All sales are final. We do not ship items for tests, so please carefully read our listing and check item compatibility with Your car before bidding. We are doing our best to provide all required information including part number of the item we sell to make sure the buyer has all the details before the deal. All sales are final. We do not ship items for tests, so please carefully read our listing and check item compatibility with Your car before bidding. We are doing our best to provide all.