Tesla's CEO Elon Musk has admitted there was a braking issue with the Model 3 sedan, pointed out by Consumer Reports, and said it could be fixed with a firmware update that the electric car maker will be rolling out in a few days.

"With further refinement, we can improve braking distance beyond initial specs. Tesla won't stop until Model 3 has better braking than any remotely comparable car," Musk wrote in a tweet cited by Reuters.

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Musk said Consumer Reports had an early production car and would request them to test a newer model.

"Model 3 now has improved ride comfort, lower wind noise & many other small improvements", Musk reportedly wrote in another tweet.

According to Reuters, the influential US magazine Consumer Reports on Monday said it would not recommend the affordable Model 3, seen as key to Tesla's profitability, as it braked slower than a full size pickup truck.

Consumer Reports criticised the Model 3 for having overly long stopping distances and a difficult to use centre touch screen, the news agency said.

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