Brand new 2026 M4 Comp xDrive jerks really hard and won’t upshift in Sport Plus
Hey everyone, I just picked up a brand new 2026 M4 Competition xDrive last week and I’ve noticed an issue since the very first or second drive. In Sport Plus mode when I accelerate in 2nd gear the car jerks really hard back and forth and refuses to upshift even though it’s in fully automatic mode. A few times it has sat around 5,000 RPM and just wouldn’t shift until I manually did it myself.
The car only has about 150 miles on it now (it already had around 20 miles when I got it from the dealer and the issue started right away). I’ve been very careful during break in keeping rpms under 5,500, zero highway trips, varying the load and waiting for oil temps to reach 200F before any spirited driving. No launches or anything aggressive and there are zero warning lights. I took it to the dealer and they said Sport Plus is supposed to feel aggressive and that this is normal but it feels excessive to me. Fellow G82 owners, does this sound normal during the break in period or does it seem like something might be wrong?