Poor mileage

Hi and thanks for your response! Yes, OEM for sure because it was the dealership and in warranty. The car has been problematic in many ways since I have owned it though. I was not getting a code on the last repair, but it was a major and dangerous failure at 80 mph on the highway. I do realize it takes time for the car/computer to relearn etc, after a new sensor. But I noticed a slightly worse mpg and slight whirring or low almost exhaust noise on my last highway trip. It's happening from 20 mph+ from what I can hear. Not quite sure of the exact location, right rear? I have dual exhausts btw. So if that is a culprit, maybe just the one? Or maybe a bearing? It happens acceleration or not. Which leads me to my next posted question. Can I still check things out with an obd2 reader even without codes as far as if anything is amiss?

I wondered that as well. I only noticed the noise maybe two weeks after the replacement. I will try and grab a video of it. It is so muffled though it is a bit hard to make out. I only really noticed it because I am so familiar with how my car has always sounded. Oddly, sounds like a flat tire moving really fast if I had to compare it to something or like a tightened camstrap vibrating with the wind.

Hi again. I tried to get a video, but it wont faint to pick up the sound. I am going to get an obd2 scanner and see if anything comes up. Will be taking it back to the dealership next week for the millionth time.

Actually I managed to capture the sound. It becomes more audible in the video when I take my foot off the gas and slow down a bit towards them end. If you use headphones or good speakers you should be able to hear it. Thanks for your continued help.

Thanks. I only noticed it last week, roughly two weeks after picking the car up. And I believe it is coming from the right rear, but sometimes it's hard to tell. The tires are A/T but not an aggressive tread just fyi. And yes, the noise could be compared to a tread noise also if I needed to compare it to something. Sometimes I also feel like its coming from the exhaust system or engine, but maybe I am over thinking it.

You were exactly right. It was both rear hubs. Thanks for your help! You nailed it.