Tesla Motors Inc. Chief Executive Elon Musk took to Twitter on Wednesday to give a firmer deadline and price for the company’s Model 3, the mass-market car that many expect is the electric-car manufacturer’s make-it-or-break-it offering.

Tesla TSLA, -5.59% will be ready to take Model 3 preorders in March 2016, and the car will cost $35,000, Musk said: