The brake lines have completely failed on my 2019 Tesla Model 3 due to rust / corrosion in the drivers side front wheel well. Fortunately failure was caught before an accident occurred. Had I not caught this failure, at highway speed this could have resulted in a very bad accident putting me and my family in danger. After the failure occurred the vehicle indicated it had low brake fluid and that it should be taken to a Tesla service center. I had two different Tesla service centers review the brake line failure, and inspect the remaining brake lines. Both service centers denied that the brake lines were covered under warranty. After connecting the second service center with a Tesla shop in the New England region the Tesla service center agreed to cover replacement under good will. While this is a positive outcome the failure of the brake lines has also identified massive corrosion issues on the battery, subframes, and bolts holding critical components together. I’ve been informed that removal of the sub-frames and battery may result in the battery being deemed faulty. This is due to corrosion found at the edges of the battery which may result in failure of the required battery pressure test. If the battery is faulty it will need to be replaced and is also not considered under warranty. The estimate for replacement is $23k which would mechanically total this vehicle. Battery corrosion is another safety issue, since the battery is designed to be sealed removing moisture from being able to penetrate the battery cells. Corrosion both on the battery pack and battery cells could contribute to failure of the battery pack while driving.