NHTSA Complaint #11454831 — 2018 LAND ROVER RANGE ROVER

One or more rigid pipes in the coolant system failed when driving down the interstate. This resulted in almost immediate overheating and the computer curtailed engine power, apparently to prevent permanent engine damage. This was very dangerous, as I was in heavy 80+ mph traffic and lost power before I could pull off onto the shoulder. This is apparently a common problem, as the rigid pipes separate at the manufacturing seam. I was still under warranty, and Land Rover had us towed to the closest dealer which was 75 miles away. That dealer told me they had two other Land Rovers in the shop with the same identical problem, and that these pipes fail "by 50,000 miles every time" (I was at 47,500 miles). The pipes in question are on all the 5.0 liter V8's used in Land Rover and Jaguar products, but the failure seems more common on Supercharged versions of the V8 (which I have). The pipes are under the supercharger and subjected to excessive heat/cool cycling which leads to failure.