For 2019, the full-size Cadillac CT6 luxury sedan is getting what might be General Motors’ first implementation of electric brake pad wear sensors, standard on models equipped with the new eBoost electro-hydraulic brake booster. That includes cars equipped with either the 2.0-liter turbo I4 LSY or 4.2-liter twin-turbo V8 LTA “Blackwing”.
Electric brake pad wear sensors have been around for more than four decades, generally being especially common on German cars. They’re quite simple in design, featuring a conductive metal loop that sits within the pad, carrying a small current during vehicle operation. As the pad wears, that loop is exposed to – and worn by – the brake rotor, increasing the resistance and causing a dummy light on the dash to illuminate, letting the driver know it’s time to change pads.
Read more at GM Authority.