Following an instrumented Consumer Reports test, the publication said it could not recommend the Tesla Model 3 to its readers – blaming inconsistent and poor braking performance.

In regular fashion, Tesla CEO Elon Musk fired back on Twitter and assured the company would take all necessary steps to fix and improve the issue, even if it meant a recall to fix braking hardware. However, ahead of the more drastic step, Tesla has begun rolling out an over-the-air update for the Model 3’s braking issue.

Musk once again took to Twitter to announce a firmware fix for the braking system. According to the CEO, the OTA update began reaching Model 3s last Friday. He also thanked CR for the “critical feedback” that led to the OTA update.

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In the publication’s initial testing, the Model 3 took 152 feet to stop from 60 mph. To put the figure in perspective, a Ford F-150 is quicker to stop than the compact electric car by seven feet.

The poor brake review first prompted Musk to announce a firmware update would likely resolve the issue. In his tweet declaring the OTA update has begun, the CEO added 60-0 mph braking distance should drop by around 20 feet. According to the executive, CR also tested an “early production run car.”  Other Model 3s have “improved ride comfort, lower wind noise & many other small improvements,” per Musk.

CR also responded to the firmware update announcement and said it will retest the Model 3 after its vehicle receives the update.