06/17/2026
When we talk new models with a b48 and b46 engines. Really the BMW 4 and 6 cylinder from around 2017. The engines have been great very little issues. The 8 speed ZF transmission is great. The cooling system is not. These photos show the degraded plastic that these engine produce. You can see the quick connect the colors its changed along with the oil cooler that has actually ruptured. Service your vehicle with professionals and remember these cooling systems will need to be rebuild between 80-120k. Schedule your service today before your summer trip!