Exhibit 5.1

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August 11, 2014

Dealertrack Technologies, Inc.
1111 Marcus Ave., Suite M04
Lake Success, NY 10042

Ladies and Gentlemen:

We have acted as special counsel to Dealertrack Technologies, Inc., a Delaware corporation (the “Company”), in connection with the preparation of (i) the Registration Statement on Form S-3 of the Company (Registration No. 333-198058) (the “Registration Statement”) filed with the Securities and Exchange Commission (the “Commission”) on August 11, 2014 under the Securities Act of 1933, as amended (the “Securities Act”) relating to the issuance and sale from time to time, pursuant to Rule 415 of the General Rules and Regulations of the Commission promulgated under the Securities Act, of an indeterminate number of shares of common stock, par value $0.01 per share (the “Common Stock”), of the Company for unspecified proceeds and (ii) a prospectus supplement dated August 11, 2014 (the “Prospectus Supplement”) relating to the resale of up to 5,924,622 shares of Common Stock (the “Shares”) pursuant to the Registration Statement.

In our capacity as such counsel, we have examined originals or copies, certified or otherwise identified to our satisfaction, of such corporate and other records and documents as we considered appropriate including, without limitation:

† In association with Tumbuan & Partners

Dealertrack Technologies, Inc., August 11, 2014 - Page 2

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, conformed or photostatic copies and the authenticity of the originals of such latter documents. As to any facts material to the opinion expressed herein which were not independently established or verified, we have relied upon oral or written statements and representations of officers and other representatives of the Company.

On the basis of such examination, our reliance upon the assumptions in this opinion and our consideration of those questions of law we considered relevant, and subject to the limitations and qualifications in this opinion, we are of the opinion that the Shares have been duly authorized by all necessary corporate action on the part of the Company, and such Shares have been validly issued, fully paid and nonassessable.

The law covered by this opinion is limited to the present General Corporation Law of the State of Delaware. We express no opinion as to the laws of any other jurisdiction and no opinion regarding the statutes, administrative decisions, rules, regulations or requirements of any county, municipality, subdivision or local authority of any jurisdiction.

We hereby consent to the use of this opinion as an exhibit to the Registration Statement and to the reference to this firm under the heading “Legal Matters” in the prospectus constituting part of the Registration Statement and in the Prospectus Supplement.