Tesla’s latest screwup involves making the font size of its braking system too small

Tesla’s latest massive recall is a weird one. It’s not about reported problems with sudden braking or driver monitoring alerts or seat belts. Nope, this one is all about font size.

It turns out that the font size for Tesla’s brake warning system is a bit too small. How small? Smaller than 3.2 millimeters, or one-eighth of an inch, as prescribed by the Federal Motor Vehicle Safety Standards (FMVSS). So the company has to recall all 2.19 million vehicles it has on the road today — again.

It may seem minor,...