Skip the auto shop - Our mechanics make house calls

Q: Car making a loud knocking noise

asked by on

My car is making a loud knocking noise.

A: Hello. Unfortunately, without hearing the n...

Hello. Unfortunately, without hearing the noise myself it is hard to make an accurate recommendation. The first thing that needs to be determined is the type of noise that is present and the possible sources. Rattling or knocking noises while driving, especially over bumps can be caused by worn or damaged suspension components or worn strut mounts. Knocking noises from the engine area could be caused by worn or damaged engine components. If the noise is resonating from the front of the engine, a possible belt pulley or tensioner could be the cause. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will be able to inspect the noise and recommend the proper repair to eliminate the sound.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I have to hold the turn signal lever down

It sounds like the turn signal lever assembly needs to be replaced. The mechanism for holding the lever and returning it are inside of it may not serviceable, however, a certified technician should be able to inspect your turn signal...

Q: Windshield wiper clicks and engine revving heard on radio

Yes, corrosion on a ground terminal or splice point can cause various engine and electrical systems issues. Looking at the wiring diagrams I see nothing related between the entertainment and engine control systems that jump out at me as the...

Q: Changed the power steering pump and tensioner but I still have a clicking noise when the car is running.

Hi there. Before changing anything else, remove the serpentine belt and start the engine to see if the noise goes away. If it does, then it definitely is coming from somewhere on the drive belt path. Investigate the pulleys and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.