I have a 2017 Malibu Hybrid with under 10k miles and the heat exchanger failed, I got a dashboard message that the engine was overheating and I had to add 1.25 gallons of dexicool. Took it to the Chevrolet dealership and they checked it out and the heat exchanger was leaking and had to be replaced. I do have concerns about my jumping in with buying a Chevrolet Hybrid car especially since they discontinued it after only 4 years and that they did not take the technology to other models and platforms. I love the car but really wonder if I will regret it after the 8 year hybrid warranty expires. Unfortunately the heat exchanger is not covered under the hybrid warranty even though it is specific to the hybrid car. It looks like these hybrid cars become very expensive to repair after the 8 year warranty expires and many times the cost of the repair is more than the worth of the car. There are threads of hybrid owners experiencing battery problems around 100k miles and having issues getting replacements. Is it wishful thinking that the Malibu Hybrid can last over 10 years or a 100,000 miles? We'll have to see but it looks like going green could end up costing more than I will save on gas.