Skip the auto shop - Our mechanics make house calls

Q: Car rattles when starting, and when slowing down

asked by on

My girlfriend's car rattles on 2 occasions: 1. From a cold start, the dashboard area vibrates/rattles a bit violently before smoothing out. 2. When making a sudden stop or slow down, the car rattles for a bit before smoothing out. Any ideas?

When a car rattles on start up, there is a possibility that it is an engine knock. An engine knock will sound like a tapping from the engine block. The more common causes of a rattle on start up are worn engine mounts. The engine mounts can make more noise on starting the vehicle, when gears are changed, or when slowing down or accelerating hard. I recommend having a certified technician, such as one from YourMechanic, inspect your car’s rattling issue before continuing to drive. Getting this checked sooner than later would be a good preventative step from potentially larger issues from occurring within the engine.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Why do I have a loud vibration?

Hello. You should verify whether the timing belt was put on correctly. All the pulleys have to be in the right position in order for the valves to open and close at the right time. If the belt is out...

Q: coughs when accelerating or going up hills while in gear.

Hi there. Typically when an engine "coughs" it is due to a cylinder misfire. This could be caused by one of several ignition system components or fuel system components that are not working efficiently due to simply being dirty or...

Q: Can ignition coils be rotated in a dodge magnum?

Typically, if there is a misfire on a single cylinder and the ignition system uses a coil-over-plug setup, one can move that coil to another cylinder. If the misfire follows that coil(misfires on cylinder 5, move coil to cylinder 3...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.