Diesel ECM reserves the right to deny any return or exchange. You may return or exchange your control module purchased from Diesel ECM within 14 calendar days from the date the module is received. The order may be subject to a restocking fee. Electronic modules are non-refundable products. Using Diesel ECM control modules for testing and eliminating possible problem areas are prohibited. In the event a control module is suspect of failing, it will be taken care of in accordance to the Warranty Policy.