Exhibit 5.1

To:

Sensata Technologies Holding N.V.

Kolthofsingel 8

7602 EM, Almelo

The Netherlands

SENSATA TECHNOLOGIES HOLDING N.V.

Privileged

Amsterdam, 10 March 2010

Dear Sir/Madam,

You have requested us, as your special counsel on certain matters of Dutch law to render an opinion in connection with the proposed filing of a registration statement, including a prospectus, relating to the Shares (as defined below).

Headings used in this opinion are for ease of reference only and shall not affect the interpretation hereof.

In this opinion:

“Commission” means the Securities and Exchange Commission;

“Company” means Sensata Technologies Holding N.V., a public company with limited liability under Dutch law;

“Existing Shares” means 144,489,586 ordinary shares in the capital of the Company issued and outstanding on the date hereof;

“New Shares” means the ordinary shares in the capital of the Company that will be issued by the Company and subscribed for by the Underwriters named in the Registration Statement;

“Registration Statement” means the registration statement on Form S-1 (Registration No. 333-163335), originally filed with the Commission on 25 November 2009 under the Securities Act of 1933, as amended (the “Act”);

“Secondary Shares” means the Existing Shares to be sold by the Selling Shareholders to the Underwriters;

“Shares” means the Existing Shares and the New Shares, collectively;

“Selling Shareholders” means the selling shareholders named in the Registration Statement;

“Underwriters” means the underwriters named in the Registration Statement; and

“Underwriting Agreement” means the underwriting agreement by and between the Company and the Underwriters.

In rendering this opinion, we have examined and relied upon, inter alia, an electronically transmitted copy of the executed Registration Statement and upon the following documents as we have deemed necessary for the purposes of this opinion:

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For the purpose of the opinions expressed herein, we have assumed:

Based upon the foregoing and subject to the limitations stated hereinafter, we are of the opinion that on the date hereof:

This opinion and any issues arising under this opinion will be governed by Dutch law.

This opinion letter is strictly limited to the matters stated herein and may not be read as extending by implication to any matters not specifically referred to.

This opinion letter may only be relied upon in connection with the transactions to which the Registration Statement relates.

We hereby consent to the filing of this opinion with the Commission as Exhibit 5.1 to the Registration Statement. We also consent to the reference to our firm under the heading “Legal Matters” in the Registration Statement. In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission.

Yours faithfully,

Loyens & Loeff N.V.

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ANNEX 1

MANAGEMENT CERTIFICATE

[To be attached as separate document]

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Annex A

CERTIFICATE OF THE BOARD

OF

SENSATA TECHNOLOGIES HOLDING N.V.

10 March 2010

The undersigned, together constituting the entire board of directors (the “Board”) of Sensata Technologies Holding N.V., a public limited liability company (naamloze vennootschap) incorporated under the laws of the Netherlands having its registered office address at Kolthofsingel 8, 7602 EM, Almelo, the Netherlands (the “Company”),

HEREBY CERTIFY

HEREBY CONFIRM

This certificate is provided to Loyens & Loeff, with the understanding that they will rely thereon in, and will assume the correctness of the above statements as of the date of, the opinion letter to be issued in connection with Documents.

Signed on the date first written above.