Skip the auto shop - Our mechanics make house calls

Q: Loud humming noise

asked by on

I had a low battery in my CLK500 and got it charged just recently. Then it started doing this loud humming noise right after I had been driving and then turning off the car. This never happened before. It doesn’t do this every single time but off and on quite often. What could this be? Should I take my car into the shop?

Hello. There could be a problem with the alternator not charging properly, causing low battery voltage. This could cause electrical components to come on and off when they shouldn’t. The alternator could be making the humming noise you hear if the bearings are going bad. I would suggest that you have a certified technician, complete an inspection of the electrical system, in order to pinpoint the problem and recommend the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Loud humming noise

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine lost power and now won't start.

Hi there. This can be caused by any number of different problems. Most of the time if the vehicle starts to gradually lose power and then it turns off it is caused by a failing fuel pump. It can be...

Q: Mass air flow sensor

Hello. The first thing that I would suggest is that you return the mass airflow sensor and get a new one. The mass airflow sensor you installed could be defective causing the same issue you were having previously. Make sure...

Q: Car has problem starting

If you suspect battery then I guess you're saying that the car has problems cranking; in that the starter motor seems to be turning more slowly when you turn the key. A car made in 2002 should probably be on...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.