Consumers have filed a total of 3 complaints for M340I models.
The front collision system does not work. Early warning rarely comes on, and in a recent near crash on the dallas north tollway, it never came on. Every now and then, the early warning front collision warning will come on for a second, but there is no reason for it. I took it to the local dealership (classic bmw) and they said it is operating as normal ,although to prove it they had to tailgate cars at 75 mph to simply get the early warning light to illuminate a few times. They never got the imminate crash warning to come on. This system is unsafe and does not provide the protection it advertises. I've driven several other makes that had this system, and the early warning comes on very early, when you are barely near the car in front of you.
I was driving on the highway at approximately 70 mph, the posted limit, when all of a sudden the sunroof exploded. It sounded like a gunshot and i almost lost control of the vehicle. Luckily the headliner was closed so the glass did not enter the cabin. There were no vehicles in front of us for at least 1 mile and no overpasses or rocks that i saw or heard hitting the vehicle. It is a stock vehicle with 5200 miles on it.
Tl* the contact owns a 2020 bmw m340i, equipped with pirelli tires, tire line: p7 cinturato, tire size 225/40/r19, dot number: not available. The contact stated that while the vehicle was at an independent mechanic for suspension inspection, the mechanic became aware of bubbles in the driver? S and passenger? S side front tires. The passenger front tire also exhibited a split. The tires were not replaced. The manufacturer was contacted and informed of the failure. The approximate failure mileage was 15,000.