The Le Mans 24 Hours is one of the most ambitious races there is, testing the endurance of drivers and their machines. Mega-Line Racing Electronic GmbH, which is providing the absolute magnetic shaft encoder in the Audi R10's transmission, has turned to solid-state sensors to improve lifetimes. Mega employs austriamicrosystems' AS5243 redundant magnetic angular position sensor, using it to measure the absolute position of the barrel shaft in the gearbox. That optimizes the whole gear change sequence. The compact 7 mm sq Hall Effect sensor is contactless, so there's no wear, improving reliability.