What are some of the porsche cayenne high mileage problems?

Most Porsche Cayenne owners don't pick up the vehicle as a daily driver, so many don't see high mileage until they're quite old. This is good news if You're perusing the preowned market, because it's very possible to find low mileage Cayennes from a dozen or more model years back. However, when they do hit high mileage, there are some problems You should look out for. First, Porsche uses plastic coolant lines, which can be melted over time by engine operating temperatures. Replacing them with aluminum lines costs upwards of $3,500, so it's not a cheap fix. You're also known to have transfer case issues, up to and including total replacement. This makes $3,500Look preferable, as a new transfer case will run You $5,000 or more. The kicker is that this issue typically hits drivers around the 90,000 mile mark, so the Cayenne isn't even particularly high mileage yet.