I have 19 inch tires on my Q5 and I was wondering if it was smart to replace all four tires with Costco tires? Has anyone gotten tires from Costco and if so, which brand do you recommend?

About 3-5k miles ago, wife started complaining that her 2018 Premium Plus with 75k miles on it felt jerky, and didn’t drive as smoothly as it used to. Initially replaced the transmission mount (cheapest and least time-consuming option at $42 in parts and 30 minutes in labor) and that reduced the jolting felt while decelerating. Still felt jerky on deceleration and when shifting from 2-1 (DSG done every 40k). However, today I finally got the time to replace both engine mounts. 4.0 hours of my time and $452 in parts and car is driving like brand new. Thought I’d post a picture of the failed engine mount on the passenger side. Driver side looked okay initially, but showed evidence on leakage out of the bottom.

Any particular reason why these engine mounts are prone to fail? I imagine it’s just speed bumps, abrupt thresholds from road to driveway and the hot climate in FL where this car. Hope this is helpful.