Recent cars represent an evergrowing budget, whether it is due to service or the unpredictable breakdowns linked to all the new technology built into cars. We usually tend to stress fairly quickly about the smallest indicator of weakness, and that is a good thing, because a problem on a BMW 3 Series has to be dealt with as soon as possible, in any other case it will get worse and affect ancillary parts. In this article we are going to find out the solutions available to you if you are victim of a BMW 3 Series that vibrates at idle. First we will try to figure out why your BMW 3 Series is vibrating when idle, and secondly what to do if it you have vibrations idle.

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Why is my BMW 3 Series having idle vibrations?

So we start our content page with the triggers of a BMW 3 Series that vibrates at idle. For this we will have to have a look at the organs that can cause this tremor. We will mainly give attention to the fact that your BMW 3 Series only shakes at idle, if you feel vibrations at acceleration on BMW 3 Series vibrations don’t hesitate to have a look at our content page which is about this problem. We can already eliminate some auto parts as possible the cause of this problem. In reality, as you are at a standstill, usually in neutral, we can already clear the vehicle’s transmission, running gear, bearings, suspensions, clutch and flywheel. You should be conscious, nevertheless, that diesel engines usually tend to vibrate much more than petrol engines, specifically older cars.
On the other hand, the bad news is that the reason your BMW 3 Series is shaking at idle is direct in connection with your engine. The main causes of this vibration are often in connection with the fuel supply of the car, the ignition or the engine silent blocks. Here are the main origins of this vibration and their results on the behavior of your BMW 3 Series:

  • Injection: If the injection of your automobile is disturbed and it motives trembling, you should feel some kind of coupling in the engine, as if the car was grazing.
  • Ignition: If, on the other hand, it is the ignition of your car that is in trouble, regardless whether it originates from a spark plug or the complete ignition, you will feel complications in the behavior of your engine unit. In fact, there will be sparks that don’t develop and it may be that one or more of your cylinders doesn’t work.
  • Engine silent blocks: The least frustrating cause of a BMW 3 Series shaking at idle is obviously the engine silent blocks. They are a form of soft plastic pad that dampen all vibrations and shaking of your car’s engine. When they wear out, they usually tend to lose their function and therefore the vibrations caused by your engine increase

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What if my BMW 3 Series is vibrating at idle?

Let’s proceed to the next step, now that you have been able to locate the origins of your problem or at least to lower the possible motives, we will explain to you that there are solutions available to fix each of these complications.

  • Injection: If your injection is the cause, the first thing to do will be to use a strong cleaning product that you will add to your fuel, it will cost you about ten euros, but if the problem is modest and only a few impurities block their proper performance, you can overcome it without going to your garage. If this is not enough, you will have to consider a whole cleaning of the injection
  • Ignition: If it is your ignition that is causing your BMW 3 Series’s idle vibrations, you will have to pass the car through the diagnostic kit to get more information on the exact problem. And consider a replacement of faulty parts, or an ECU adjustment
  • Motor Silent Blocks: The last reason of vibration at standstill on your BMW 3 Series is that the vibration originates from your motor silent blocks. This is the repair that will cost you the least. In fact, changing silent blocks should not cost you more than 200€, go to your garage to make this change and prevent your BMW 3 Series from shaking at idle.

Here are the main motives and answers to fix your problem of vibration at idle on BMW 3 Series, if furthermore to shaking it does not hold idle, do not hesitate to consult our article on this problem.

If you wish more guides on the BMW 3 Series, go to our BMW 3 Series category.