Exhibit 5.1

Deloitte LLP Bay Adelaide East 8 Adelaide Street West Suite 200 Toronto, ON M5H 0A9 Canada   Tel: (416) 601-6150 Fax: (416) 601-6151 www.deloitte.ca

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on Form F-10 of our reports dated February 26, 2023 relating to the financial statements of Magna International Inc. and subsidiaries (the “Company”) and the effectiveness of the Company’s internal control over financial reporting, appearing in the Current Report on Form 6-K for the year ended December 31, 2022. We also consent to the reference to us under the heading “Interests of Experts” in such Registration Statement.

/s/ Deloitte LLP

Chartered Professional Accountants

Licensed Public Accountants

Toronto, Canada

February 28, 2023