I took excellent care of my 2014 Buick Enclave, including getting all recommended services and regular oil changes. So, complete engine failure at 51,000 miles is unacceptable! The reason is a manufacturer defect in the timing chain that destroyed the engine. Of course, my vehicle was not under warranty, and the manufacturer did not recall the defect. So I was on the hook to replace the engine. I instead opted to sell the vehicle. Not worth putting any money in this piece of junk. Stay away from GM and Buick vehicles!!!

I bought my Buick Enclave 2014 December of 2017 with 44,000 miles on it. At one year (almost to the day) of ownership, my wife reported that the engine made a weird noise as she backed into a parking space. When she later started it everything seemed fine (no noises) but as she pulled from the parking lot it simply died (no other noises, no warning lamps nothing) Thats the final time it ran. I unsuccessfully tried to jumpstart it, but it wouldn't turn over (headlights, & inside lights dimmed down to off when trying) I replaced the battery ($190) hoping that was the issue, then finally had it towed ($60) to a mechanic. They initially diagnosed the issue as a starter ($550) but once the new starter was installed the engine still would not turn over. They somehow connected to the crankshaft attempting to manually turn the engine over & it will not move forward. They have now told me that "something is loose" inside the engine and are saying it's likely a rod (and they can spend 10 labor hours pulling the oilpan to take a look ($1000) if I want. The solution? A new engine to the tune of $7200. I still owe $20,000 on this car with 62,000 miles and i'm on the hook for $7200? ludicous!

Update from Jan 16, 2019: I've been meaning to update this, in short after speaking with the dealer it turns out that my powertrain warranty was still in effect (until 70,000) so they have fixed the issue by replacing the motor. The diagnosis was that it one of the (exhaust?) valves stuck shut but the intake kept pumping in fuel and caused a piston or rod issue.