Complete return information is listed on the return request form:
http://www.accuautoparts.com/images/RGAform.pdfIf you would like to expedite the process, you can send us a note including the tracking information the day after it is received back, and we can pull it to credit immediately.
Before returning, you may want to request fitment confirmation in the parts or tech forum to find out what the issue is and what other part may fit your application.
Customer Service
AAC/AAP