Originally Posted by
tommeke_B
You cannot put a percentage on what they contribute, their work isn't measurable (unless they make a mistake). But for example we have seen a big impact with Järveoja on Tänak, who wasn't constant and reliable, now he's one of the most reliable drivers in the championship. For Neuville there was a turning point in his career when he started working with Nicolas Gilsoul, Neuville would likely not be in the WRC now without Gilsoul. If codrivers were so unimportant as you say, there would be far more switches I think. Recently there are some drivers in WRC who switched codrivers, but most were already very reliable drivers with a lot of experience (Sordo, Ostberg, Mikkelsen).