My 2011 MDX is at the dealer now for state inspection and rear brakes (originals and I knew they needed to be replaced). I have almost 75K miles on my vehicle. The battery warning light has been coming on (Replace Battery now) for a while. I previously had them check it and they said my battery tested fine, this was about 6 months ago. They cleaned the connections and it was fine. Anyway it's been coming on a lot lately so they tell me now their diagnostics say the battery needs to be replaced. Not too surprising with the age/miles on the vehicle, but I've never had an issue with it starting or even hesitating to start. But I told them to put a new battery in it, thinking the sensor is getting this before it's a real problem and I get stranded somewhere. They asked if it came on only when I started or when driving as well. I said that once or twice it has come on when driving but usually when starting. Usually when I drive for a bit the sensor goes off. They said that if it came on when driving it could indicate the alternator was going too. Question - is that covered under the extended warranty (I purchased one through 100K miles through Acura) and two, would you address the alternator now or just see what happens with a new battery? I'm very much hoping it's not the alternator now since I've already run up a significant bill for brakes and a battery along with inspection. By the way, they gave me a 2016 MDX loaner. From the outside I wasn't overly impressed, but wow, it drives like a dream. Lots of additional bells and whistles too, but the big thing was the way it drove and handled. Very, very smooth. I love my 2011, but they're no dummies giving me the 2016 to tool around in. Thanks!