Tesla Motors Inc. said it delivered 11,507 Model S sedans in the second quarter of the year, a 52% increase over the prior-year period and a company record.

But to meet Chief Executive Elon Musk's ambitious sales goal of 55,000 deliveries in 2015, the company will have to see an uptick of growth in the second half of the year.

Tesla reported 10,030 deliveries in the first quarter.

If Tesla is able to meet Mr. Musk's goals, which also include 500,000 deliveries by 2020, the benchmarks would transform Tesla's profile in the cutthroat car business. While a fraction of what is sold annually by most auto makers in the world, Tesla's is an audacious goal for a company that started mass-producing automobiles just a few years ago.

To reach his target, Tesla's billionaire founder needs a flawless debut of a new model— the Model X sport-utility vehicle—in the second half of the year.

To date, Mr. Musk has struggled to hit projections and launch vehicles that meet initial timing or pricing expectations, so the Model X's launch poses a test of Tesla's ability to make the leap from niche to mainstream.

Write to Chelsey Dulaney at Chelsey.Dulaney@wsj.com

Access Investor Kit for Tesla Motors, Inc.

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US88160R1014

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Tesla (NASDAQ:TSLA)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Tesla Charts.
Tesla (NASDAQ:TSLA)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Tesla Charts.