EX-5.1

35 W. Wacker Drive

Chicago, IL 60601

T +1 312 558 5600

North America Europe Asia

F +1 312 558 5700

Exhibit 5.1

January 7, 2019

Motorola Solutions, Inc.

500 W. Monroe Street

Chicago, Illinois 60661

Re:

Prospectus Supplement to Form S-3ASR

Ladies and Gentlemen:

We have acted as special counsel to Motorola Solutions, Inc., a Delaware corporation (the “Company”), in connection with the registration of the offer and resale of 1,802,379 shares of common stock, par value $0.01 per share (the “Shares”), of the Company by selling stockholders named in a supplement to the prospectus (the “Prospectus Supplement”) to the Company’s registration statement on Form S-3ASR (the “Registration Statement”), File No. 333-223828, filed on January 7, 2019 with the Securities and Exchange Commission the under the Securities Act of 1933, as amended (the “Securities Act”).

This opinion letter is being furnished in accordance with the requirements of Item 601(b)(5) of Regulation S-K promulgated under the Securities Act.

In rendering the opinion set forth below, we have examined and relied upon such certificates, corporate records, agreements, instruments and other documents, and examined such matters of law, that we considered necessary or appropriate as a basis for the opinion, including (i) the certificate of incorporation of the Company, as amended, as in effect on the date hereof, (ii) the by-laws of the Company, as in effect on the date hereof, and (iii) resolutions of the Board of Directors of the Company relating to, among other matters, the issuance of the Shares. In our examination, we have assumed the legal capacity of all natural persons, the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified or photostatic copies and the authenticity of the originals of such latter documents. As to any facts material to the opinion expressed herein that we did not independently establish or verify, we have relied upon oral or written statements and representations of officers and other representatives of the Company and others.

Based upon the foregoing and subject to the assumptions, qualifications and limitations set forth herein, we are of the opinion that the Shares have been duly authorized and are validly issued, fully paid and nonassessable.

The opinion expressed herein is based upon and limited to the General Corporation Law of the State of Delaware, including the statutory provisions, the applicable provisions of the Delaware Constitution and reported judicial decisions interpreting the foregoing. We express no opinion herein as to any other laws, statutes, regulations or ordinances.