Enlarge / The R1S and R1T don't look much different from the electric trucks we drove in 2022, but under the skin, there have been a lot of changes. (credit: Rivian)

In rainy Seattle this week, Rivian unveiled what it's calling the "Second Generation" of its R1 line with a suite of mostly under-the-hood software and hardware updates that increase range, power, and efficiency while simultaneously lowering the cost of production for the company. While it's common for automotive manufacturers to do some light refreshes after about four model years, Rivian has almost completely retooled the underpinnings of its popular R1S SUV and R1T pickup just two years after the vehicles made their debut.

"Overdelivering on the product is one of our core values," Wassym Bensaid, the chief software officer at Rivian, told a select group of journalists at the event on Monday night, "and customer feedback has been one of the key inspirations for us."

For these updates, Rivian changed more than half the hardware components in the R1 platform, retooled its drive units to offer new tri- and quad-motor options (with more horsepower), updated the suspension tuning, deleted 1.6 miles (2.6 km) of wiring, reduced the number of ECUs, increased the number of cameras and sensors around the vehicle, changed the battery packs, and added some visual options that better aligned with customizations that owners were making to their vehicles, among other things. Rivian is also leaning harder into AI and ML tools with the aim of bringing limited hands-free driver-assistance systems to their owners toward the end of the year.