We do not list this key set as compatible with the Shoprider Echo 3. Those type of components can be serial number specific so we will need that in order to advise on compatibility. It will be the 13-digit number found on the rear frame. They always start with the number 1. Please give us a call at 1-800-798-0325 or email us at contact@monsterscooterparts.com to provide your unit’s serial number, and we would be happy to help you find the replacement key.