On most modern BMW models (with Hot V V8 engines like the N/S 63) the coolant tank that is supposed to last at least the lifetime of the vehicle, only lasts about 40,000 Miles before cracking. The main issue is that the tank sits over the engine, which when coolant leaks, it will leak into the injectors causing engine misfires. There is no warning to the issue until you have a low coolant, but at that point, the coolant has already dripped into your engine. Not only this but anti freeze can cause corrosion to metal, plastic and all the wiring. This can lead from a $400 tank to a 4 figure engine repair with no early warning signs until too late. Also environmentally, dripping antifreeze everywhere is not good…
- NHTSA ID
- 11763306
- Incident
- Jun 13, 2026