KEY POINTS
  • Tesla reported a loss of $702 million on an adjusted basis for the first three months of 2019.
  • The company also burned through $1.5 billion in cash.
  • Now an analyst says the firm risks losing its premium brand and pricing.

Tesla's Model S and X cars are reaching the end of their product life cycle and will need a serious upgrade if the company wants to retain a luxury price tag, one auto analyst told CNBC.

Tesla shares were largely unchanged in after-hours trade Wednesday, after the electric car maker posted a wider-than-expected first-quarter loss on an adjusted basis.