Tesla Inc said on Jan 20 that there was no unintended acceleration in its vehicles, as it responded to a petition to a US safety regulator to investigate and recall around 500,000 of the company's electric cars over the alleged defect.

On Jan 17, the US National Highway Traffic Safety Administration (NHTSA) said it would review the petition and released a redacted version that said "Tesla vehicles experience unintended acceleration at rates far exceeding other cars on the roads."

The petition urged the agency to recall all Tesla vehicles, the Model S, Model X and Model 3, produced beginning in 2013. It cited media reports of crashes attributed to unintended acceleration and complaints filed with US NHTSA.

Tesla said the petition was "completely false" and was brought forward by a short-seller.

Brian Sparks, who is currently shorting Tesla stock, according to CNBC, submitted the petition in September.

"Over the past several years, we discussed with NHTSA the majority of the complaints alleged in the petition. In every case we reviewed with them, the data proved the vehicle functioned properly," Tesla said in a blog post.

A spokesman for US NHTSA on Jan 20 declined to comment on Tesla's statement. The agency said last week it "will carefully review the petition and relevant data."

Sparks could not be immediately reached for comment.

 - Reuters