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      12-11-2022, 05:21 PM   #1
skinquilt
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Drives: 2014 BMW X1 xdrive28i
Join Date: Dec 2022
Location: Midwest

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2014 X1 jerking / bucking when deceleration with cold engine

Hello everyone. Long time reader first time poster.

I am having an issue with my 2014 BMW x1 xdrive28i - 103xxx miles. Recently it has started to jerk/ buck when decelerating, such as coming to a stop sign. It happens when decelerating from higher speeds and also when at slower speeds / not over 10mph. It will jerk every-time I stop for about 20 min after turning on the car (but only when I am coming to a stop) and then goes away when the engine has warmed up. It almost feels like someone is bumping in to me from behind. If the engine is warm and i shut off to run errands, it will not jerk when i start driving again. I'm located in the midwest where it's currently cold. It happens more frequently in the winter but only jerks here and there in the warmer months.

I do not have any service lights on, there is no vibrations at any time, nothing else seems wrong except for the jerking. I cannot tell what part of the car is causing the issue. There does not seem to be any issues shifting gears up or down but occasionally I will see the rmp's jump when slowing down into lower speeds. There are no leaks on the undercarriage. The only leak under the hood is from the oil filter housing which is causing a small amount of oil to leak on the engine below. Otherwise the engine is clean.

I have brought it to a transmission specialist thinking it could be transmission related but they said they found nothing wrong in the tests. I brought it to an indy shop who said they cant find any issues either.

I always keep up on oil changes / maintenance and just changed all my fluids at 90xxx miles including the transfer case but not the rear or front diff (as they are sealed).

Someone suggested the giubo flex disc but I don't have other symptoms of a bad guibo including no vibrations. I also read about something going on the with brakes but i'm not sure.

I have read tons of posts but cannot find anyone with the same issue as me. Im just trying to feel it out before i break down and bring it to the dealership. It's not under any warranty.

Any thoughts?
Thanks!
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