06/18/2026
How did an automotive giant fail? In 2010, Navistar skipped SCR for their diesel trucks, using EGR instead. The result? Choked filters, cracked coolers, and constant breakdowns. An executive admitted they “did not test” after selling 60k engines. It led to $2B+ in damages before they adopted SCR. For pros in mechanics and diesel repair, it’s a lesson: never skip testing.