Stock 2021 BMW M3 Competition Cranks Out 538 HP on the Dyno

Reliability isn’t the strongest point of modern BMWs. Too many electronics, too much plastic, and engineering deficiencies are pretty common, but when they run, BMW engines are very impressive. Take, for instance, the S58 motor introduced two years ago in the X3 M and X4 M. It’s based on the B58 engine, which may be affected by coolant loss, a bad valve cover gasket, a disintegrating oil filter, and failing VANOS solen...