Tesla sent California regulators incomplete records of injuries at its main assembly plant, according to California's Division of Occupational Safety and Health.

Tesla failed to mention as many as 36 injuries in 2018 alone when reporting injuries to the state.

Under scrutiny about workplace injuries, Tesla has repeatedly claimed that regulators praised its record-keeping — an assertion that is undermined by the state's records.

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Tesla defended the safety of its assembly plants last month, claiming in a statement that California regulators praised the company for "99% accuracy in our safety record keeping."

But there's no evidence to support that claim, according to documents maintained by California's Division of Occupational Safety and Health, first reported by Bloomberg and confirmed by Business Insider.

In a memo sent to Tesla in December, Cal/OSHA warned the company that it found Tesla had repeatedly failed to mention injuries at its main assembly plant in reports to the state. At least 36 injuries were left out of Tesla's records in 2018 alone.

A Cal/OSHA spokesperson provided Business Insider with a copy of the memo, which contradicts Tesla's claim that regulators praised the company for "99% accuracy."

Tesla has faced scrutiny for years over its historically lackluster record on factory injuries. In 2018, Tesla factory workers told Reveal that hazardous zones were not properly marked in part because CEO Elon Musk "does not like the color yellow." Musk has claimed that Tesla is held to an unfair standard for factory injuries.

"We do get these unfair accusations, for example, that we are underreporting injuries," Musk said in an October 2018 earnings call. "It's worth noting that OSHA completed their investigation and concluded that we haven't done ... anything of the sort."

But the new report contradicts that claim. The three dozen injuries that Tesla reportedly failed to disclose in 2018 mean at least 4% of its reports that year were missing.

A Tesla spokesperson did not immediately respond to Business Insider's requests for comment.