Elon Musk's Tesla recalls two million cars over Autopilot defect

Tesla is recalling more than two million cars after the US regulator found its driver assistance system, Autopilot, was partly defective.

It follows a two-year investigation into crashes at the firm owned by billionaire Elon Musk, which occurred when Autopilot was in use.

The recall applies to almost every Tesla sold in the US since the Autopilot feature was launched in 2015.

Tesla said it would send a software update "over the air" to fix the issue.

The update happens automatically, and does not require a visit to a dealership or garage, but is still referred to by the regulator as a recall.

Autopilot is meant to help with steering, acceleration and braking - but, despite the name, the car still requires driver input.