Q: Knocking sound under car

asked by on

When the car reaches about 50mph i begin to hear a knocking noise and the steering wheel shakes. Can you tell me what this could be?

My car has 261000 miles.
My car has an automatic transmission.

Hi there. Either the tires are out of balance and causing the front end to shake and make the steering parts move around or there is a loose steering or suspension part that is moving around as the vehicle is going over bumps on the roadway. Also, the air dam under the vehicle could be loose causing it to make the noises that are heard at highway speeds. Look for any loose items that could make a sound when there is excessive air passing around them. If you need further assistance with your vehicle shaking and making a noise, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Knocking sound under car

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: Squeking sound on my left coilovers driverside

If a bushing has failed, or a rubber spring insulator has torn, you might be hearing metal to metal contact and that could account for the squeaking. Other possible sources of squeaking noises are the strut, shock absorber, sway bar...

Q: Check Engine Light is on and I've noticed one minute my gas says a half a tank and the next it's at a quarter

Hello. This is most likely a faulty fuel sending unit. This is a unit that sits in the fuel tank that sends a signal relaying how much fuel is in the tank. These commonly go bad on many cars. If...

Q: Steering wheel groans/sputters on turns

Hello, thank you for writing in. The previous tech who examined the vehicle may be correct, but it is impossible to verify that without the vehicle in front of us. The steering column can cause these symptoms, but so can...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...