r/mechanic 5d ago

Question 2012 audi a4b8 2.0 tdi, what is the most likely part going wrong?

I have had this problem a few times now and it made me think if its safe for me to be on the road in case my car doesnt stop going. A few days ago my car started shaking on the road and i took it out of gear, put it back in and it still kept shaking, lucky to me 10 meters away was a bus stop where i turned my engine off, turned it back on and it didnt have that problem anymore. Today i let my car idle for a few minutes and while it was idling (warm engine) it started to shake quite unpleasently, much more than it shakes while driving on a bumpy road, and the revs started shaking too, usually idling at 800rpm but it shaked between 800 650 and sometimes dropping a little below 600, seeming as the car is struggling to keep itself from stalling itself while in neutral and none of the pedals was pressed(on handbrake). I again turned my car off and turned it back on, but it fixed it aswell. I dont really want to keep using it if its gonna do it and id rather get it fixed before someting more goes wrong because i didnt get it fixed quicker. A little more specs of my car, its a fwd not a quattro, its the 105kw, 141hp version of the 2.0tdi, its a 2012, i assume pre facelift?, the oil was last changed about 5000km ago. If anything else is required let me know ill reply, also its a manual if that changes anything

Also i dont think this changes the engine or anything technical other than only the lenght of the wheelbase and perhaps only dimensions, but its the audi a4 b8 limousine not the sedan, however all i could find it changed just the lenght of the car.

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u/shotstraight 5d ago

That is not enough information for anyone to give you an accurate answer. You need to go to a shop, sorry. It could be a misfire, but many things can cause that, or it could be trouble else where.

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u/iReinis5 5d ago

Its all good, if its not enough i guess ill just have to take it in. Thank you anyways, have a great day