One problem related to engine rattling and whining sounds has been reported for the 2015 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Outback based on all problems reported for the 2015 Outback.
Exhaust system issue. Exhaust mainfold leak at catalyst converter. For our Outback we noticed a significant levels of exhaust fumes in passenger cabin. They were no indication of failure of exhaust system or catalyst converter on the car. But we are getting some much fumes smell when we stopped at the traffic signal or parking lot. It all most made us sick. Luckily I got it checked at the service center and they find the leak. This is potentially a very risky thing for people who don't notice the smell might get slow poisoned with carbon monoxide or other elements in exhaust fumes. There may be direct injury from this issue but as I said I was almost got sick because of fumes. For people with pzev vehicle, the exhaust system is covered under warranty. Please bring this issue with manufacturing. For people out there if you notice a loud exhaust note at start of your vehicle or small rattling noise when we you accelerate after a complete stop, it might be your exhaust system, please get it checked as soon as possible. Ps attached is the diagnosis report from dealer service center be safe out there !! thank you.