XC60 B5 owners — anyone else notice jerkiness when stop-start restarts the engine?
Hey all, I have a 2025 XC60 B5 Plus with about 5K miles. I’ve had the car for almost a year with no issues, but over the past month or two I started noticing a jerkiness or lumpiness when the auto stop-start restarts the engine — for example when pulling away from a stop sign after the engine has shut off. Almost like too much power being delivered abruptly on the restart. I’m based in the US.
I took it to the dealer and they couldn’t find anything wrong. I then tried disabling the auto stop-start and the jerkiness went away completely. I’m on software version 5.1.17 which allows you to disable stop-start, and that has resolved the issue for me. Keeping it disabled for now and waiting on the upcoming software update to see if that addresses it permanently.
Anyone else experiencing something similar? Curious if this is a known issue with the stop-start/Integrated Starter Generator (ISG) system.