Magna International (MGA) F-10/A Registration of securities (Canada) (amended)

Exhibit 5.1

Deloitte LLP

Bay Adelaide East

8 Adelaide Street West

Suite 200

Toronto ON M5H 0A9

Canada

Tel:416-601-6150

Fax:416-601-6610

www.deloitte.ca

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Amendment No. 1 to Registration StatementNo. 333-237672 on FormF-10 of our reports dated March 5, 2020 relating to the consolidated financial statements of Magna International Inc. and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting, incorporated by reference in the Company’s Report on Form6-K dated March 27, 2020. 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

May 7, 2020