Lithium Argentina AG — Capital/Financing Update 2021

Jan 20, 2021

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January 20, 2021

FILED BY SEDAR

British Columbia Securities Commission (Principal Regulator) Alberta Securities Commission Financial and Consumer Affairs Authority of Saskatchewan Manitoba Securities Commission Ontario Securities Commission Financial and Consumer Services Commission, New Brunswick Superintendent of Securities, Department of Justice and Public Safety, Prince Edward Island Nova Scotia Securities Commission

Superintendent of Securities, Newfoundland and Labrador Superintendent of Securities, Northwest Territories Superintendent of Securities, Yukon Territory Superintendent of Securities, Nunavut

Dear Sirs / Mesdames:

RE: Lithium Americas Corp. (the “Corporation”) Prospectus Supplement dated January 20, 2021 to the Final Short Form Base Shelf Prospectus dated October 19, 2020 (the “Supplement”)

We refer to the Supplement of the Corporation relating to the offering of common shares.

We, as counsel to the Corporation, hereby consent to the use of and reference to our firm's name and opinion under the headings “Certain Canadian Federal Income Tax Considerations” and “Eligibility for Investment” and to the use of and reference to our firm name on the face page of the Supplement and under the headings “Documents filed as part of the Registration Statement” and “Legal Matters”.

We confirm that we have read the Supplement and that we have no reason to believe that there are any misrepresentations in the information contained therein that is derived from our opinions referred to above or that is within our knowledge as a result of the services we performed in connection with such opinion.

Yours truly,

“CASSELS BROCK & BLACKWELL LLP”

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