Customer Service Form
For all inquiries to SEMA’s Customer Service Team, please use the form below. The appropriate staff member will respond to your request within 24 hours during business days.
You can also contact SEMA via phone at 909-610-2030 and speak to a Customer Service Team member immediately. If you would like to contact SEMA via mail, please use the address listed below: SEMA Headquarters 1575 S. Valley Vista Drive Diamond Bar, CA 91765