The Dell warranty conditions are shown here. And especially this statement from the warranty conditions which reads:  Dell owns all parts removed from repaired products and, in most instances, you will be required to return defective parts to Dell. Also please do not post a service tag number in the forum for your own safety and security.
To: [NAME] South AfricaFrom: Lubabalo Emihle Mufamadi Greetings to whom it may concern. I have a Inspiron 3582 with service tag . I requested assistance from Dell Support, reference number: . A technician was dispatched, dispatch number: . The issue was a hard drive locked bios. My original hard drive was replaced by the technician in an attempt to resolve the issue. I found a way to backup the password on bios and entered the new hard-drive's bios to retrieve the password for the old hard drive. My support services have expired and would love to ask whether if there would be a way to have the original hard drive returned to me. Please offer any assistance or reply.  Kind regardsLubabalo Emihle Mufamadi
A solution to a bios locked hard drive?