Exhibit 5.1

29 October 2025

Dear Sir/Madam,

It is proposed that Mobilicom Limited (ACN 617 155 978) (the Company) will issue fully paid ordinary shares in the capital of the Company (Ordinary Shares), including Ordinary Shares which will be represented by American Depository Shares (ADSs), having an aggregate offering price of up to US$37.0M to be listed on the Nasdaq Capital Market which may be issued and sold by the Company pursuant to a Sales Agreement with ThinkEquity LLC dated 3 February 2025 as amended pursuant to an Amendment No. 1 to ATM Sales Agreement dated 29 October 2025 (which amended the Sales Agreement to (i) increase the maximum offering price from up to US$10M to up to US$37.0M, and (ii) permit the offer and sale of Ordinary Shares in addition to ADSs) (collectively the Amended Sales Agreement) by way of an “at the market offering” referred to in a Prospectus Supplement filed by the Company with the Securities Exchange Commission under the United States of America Securities Act of 1933 (Securities Act) dated 29 October 2025 (Prospectus Supplement).

The above is collectively referred to as the Offer.

The Bank of New York Mellon is to act as depositary, in connection with the Deposit Agreement dated 24 August 2022 (Deposit Agreement) among the Company, The Bank of New York Mellon, as depositary (Depositary), and all owners and holders from time to time of ADSs issued thereunder.

We have been provided with final drafts of, and this letter refers to:

(the above together referred to as the Documents).

We have been asked to provide this opinion to the Depositary in connection with the Offer.

We are acting as Australian counsel to the Company, an Australian public company, in connection with the Offer. Our engagement has involved a review of certain aspects of the Documents and reviewing and providing advice on those aspects of the Documents (in each case in respect of those aspects relating to matters pertaining to Australian law). Our opinions are given in the context of the role we have performed. For the avoidance of doubt, we express no opinion on any matters related to taxation (except as specifically stated below) or any non-legal matters (including but not limited to operational, financial, statistical or accounting data published or warranted by the Company whether contained in the Documents or otherwise provided by the Company) nor any non-Australian legal matters.

When an opinion set forth below is given to our knowledge or with reference to matters of which we are aware or which are known to us, or with another similar qualification, the relevant knowledge or awareness is limited to the actual awareness of the individual partners and lawyers in the firm who participate directly in the representation of the Company and limited by the scope of our engagement by the Company.

We have assumed that any resolutions of the Board of the Company provided to us for the purposes of this letter have not been and will not be varied or revoked after the date of this letter and that the meetings or circulating resolutions of the Board of the Company at which those resolutions were considered were properly convened, all Directors who voted were entitled to do so, the resolutions were properly passed, and the Directors have performed their duties properly and all provisions relating to the declaration of directors’ interests or the power of interested directors under the Corporations Act 2001 (Cth) (Act), being the Australian corporations law, were duly observed.

We have also assumed the genuineness of all signatures and the authenticity of all documents submitted to us (whether as originals or copies), including without limitation the accuracy of all registers and other records of the securities on issue in the Company as provided to us by the Company or an officer of the Company.

We have assumed the accuracy of any searches obtained from the Australian Securities and Investments Commission (or from elsewhere) in relation to the Company. We also rely as to matters of fact, on certificates or other written statements of officers of the Company which may be provided either to us or in connection with the Offer or the documents.

On, and subject to the terms set out in this letter, we are of the opinion that:

This opinion, which shall be governed by and construed in accordance with the laws of the Commonwealth of Australia and Victoria, Australia, is given only with respect to those laws that are in effect as at the date of this opinion. We have not investigated the laws of any jurisdiction other than Australia.

We express no opinion as to tax law or international law. We have assumed that any applicable law (other than Australian law) does not affect this opinion.

This opinion speaks solely as of its date and we undertake no obligation to advise you of any changes (including but not limited to any subsequently enacted, published or reported laws, regulations or individual decisions) that may occur or come to our attention after the date hereof.

We hereby consent to the inclusion of this opinion as Exhibit 5.1 to the Prospectus Supplement and to the references to our firm therein and in the base prospectus under the caption “Legal Matters.” In giving our consent, we do not admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations thereunder.

This opinion is addressed to and may be relied upon only by you in connection with the Offer and is not to be relied upon for any other purpose or by anyone else without our prior written consent.

Exhibit 10.1

AMENDMENT NO. 1 TO ATM SALES AGREEMENT

This AMENDMENT NO. 1 TO ATM SALES AGREEMENT (this “Amendment”) dated as of October 29, 2025 by and Mobilicom Limited, an Australian corporation (the “Company”) and ThinkEquity LLC (the “Agent”). Each of the Company and the Agent shall be referred to collectively as the “Parties” and individually as a “Party.”

W I T N E S S E T H:

WHEREAS, the Company and the Agent entered into an ATM Sales Agreement dated as of February 3, 2025 (the “Sales Agreement”) pursuant to which the Company engaged the Agent to sell the Company’s ADSs, from time to time; and

WHEREAS, the Parties desire to amend certain provisions of the Sales Agreement as set forth below.

NOW, THEREFORE, in consideration of the mutual promises and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, each of the Parties agrees with the other as follows:

1. Capitalized Terms. Unless otherwise defined herein, all terms and conditions used in this Amendment shall have the meanings assigned to such terms in the Sales Agreement.

2. Amendment to Sales Agreement.

a. The Sales Agreement shall be amended as follows:

b. For the avoidance of doubt, upon the effectiveness of this Amendment, the amount of Placement Shares that may be sold pursuant to the Sales Agreement shall be equal to the Maximum Amount (as defined in Section 1 of the Sales Agreement).

3. Full Force and Effect. Except as herein amended, the Sales Agreement shall remain in full force and effect. Upon the effectiveness of this Amendment, each reference in the Sales Agreement to “this Agreement,” “hereunder,” “herein” or words of like import shall mean and be a reference to the Sales Agreement, as amended by this Amendment. In the event of an inconsistency between this Amendment and the Agreement, the terms of this Amendment shall prevail.

4. Further Assurances. Each Party hereto, without additional consideration, shall cooperate, shall take such further action and shall execute and deliver such further documents as may be reasonably requested by the other Party hereto in order to carry out the provisions and purposes of this Amendment.

5. Counterparts. This Amendment may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Delivery of an executed Amendment by one Party to the other may be made by facsimile transmission.

6. Headings. The section headings herein are for convenience only and shall not affect the construction hereof.

7. Waiver. Neither any failure nor any delay by any Party in exercising any right, power or privilege under this Amendment or any of the documents referred to in this Amendment will operate as a waiver of such right, power or privilege, and no single or partial exercise of any such right, power or privilege will preclude any other or further exercise of such right, power or privilege.

8. Severability. In the event that any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable as written by a court of competent jurisdiction, then such provision shall be given full force and effect to the fullest possible extent that it is valid, legal and enforceable, and the remainder of the terms and provisions herein shall be construed as if such invalid, illegal or unenforceable term or provision was not contained herein, but only to the extent that giving effect to such provision and the remainder of the terms and provisions hereof shall be in accordance with the intent of the parties as reflected in this Amendment.

9. Governing Law and Jurisdiction. This Amendment shall be governed by, and construed in accordance with, the laws of the State of New York, without regard to the principles of conflicts of laws. Any disputes arising from this Amendment shall be resolved pursuant to Sections 17 and 18 of the Sales Agreement.

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IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to Sales Agreement to be duly executed as of the day and year first above written.