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      04-21-2020, 01:58 PM   #1
Jackdyo
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Drives: BMW 120d xdrive 2015
Join Date: Mar 2020
Location: Sheffield

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Help 2015 120d xdrive whistling under acceleration

Hi all,

Need help my car is currently making an awful whistling sound under acceleration, I can cross the following of my list Turbo (fitted brand new 2 months ago was thought to be original cause for noise) rear diff (new rear diff fitted 1 month ago had leaked and bone dry)

I've had the car 6 months now and noticed the noise around 4 months after getting the car, recently it's become louder and more constant when accelerating

I have so noticed a major decrease in MPG and the car is not as responsive or quick as when I got it

Tbh it's driving me mad and hoping for some input




Last edited by Jackdyo; 04-21-2020 at 02:36 PM..
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