Rivian Owners Report Highway Assist Issues After 2025.26, Rivian Promises Improvements

Rivian’s 2025.26 update has brought one of the biggest shifts yet in driver assistance tech. As we noted earlier this week, Rivian quietly dropped Mobileye from Highway Assist and fully switched over to their own in-house hardware that has shipped with every Gen 2 vehicle. Read our earlier coverage here.

That’s a bold move, but it hasn’t come without growing pains. Many Gen 2 owners, myself included, have noticed that Highway Assist feels rougher than before. Lane centering has definitely taken a step back. Instead of holding the middle, my R1T and R1S now hug the left side of the lane more often than I’m comfortable with. Even when it manages to stay centered, the vehicle tends to wobble inside the lane in a way that feels unstable. On a few occasions, it has even drifted partway into the neighboring lane, which is a hard no for me.

Friend of the site Travis Ketchum also shared similar experiences on Twitter, echoing the same quirks I’ve been seeing. And while this may sound like a step backward, it’s worth remembering that this is Rivian’s first release without leaning on Mobileye. Building out their own ADAS stack is no small task, and it’s going to take iterations to get it right.

The good news: Rivian knows about it. I was able to confirm with Rivian’s Head of Software, Wassym Bensaid, that the company is aware of these Highway Assist issues and is already working on improvements that will roll out in upcoming software updates.

To Rivian’s credit, 2025.26 did bring some wins too. Stop-and-go traffic feels noticeably smoother, and lane changes are quicker and more confident than before. These are promising signs that Rivian’s system has a lot of potential once they iron out the rough spots.

For now, I’ll keep monitoring how Rivian continues to evolve ADAS with each update. This shift away from Mobileye is a huge milestone for the company, and while it may feel messy at first, it sets the stage for Rivian to own the full stack of driver assistance tech moving forward.