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Ignition coils likely. Different car but similar case, I have a Cayenne Turbo S and I noticed the car suddenly felt like it had no balls accelerating. I thought it was a boost leak at first but turned out after replacing the spark plugs I did not push the coils all the way down on the plug. They were making good enough contact not to throw a miss-fire CEL but under the G forces while accelerating the would lift off the plug and not make good contact.
Give your coils a firm pushing or consider replacing if problem persists.
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2016 X3 35i |M-Sport|Megan Racing Coilovers|FBO+|BM3|Jordan Tuned|Valvetronic Designs|
1998 750iL V12|2017 440i|2019 991.2 GT3RS Weissach|2019 Model X|...and some others
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