Why does it sound like something is rattling under my car?

If the rattling sound sounds like it is coming from underneath your vehicle, you likely are experiencing a problem with your exhaust system. Exhaust system problems include catalytic converter problems, muffler issues or corroded pipe, can sound like light rattling to rocks shaking beneath your car.
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What causes a rattling sound under my car?

Rattling from under your car– This can be caused by loose parts such as your exhaust system. Squealing wheels while braking– Causes range from small, such as dirt on the brake pads or rotors, to serious, such as worn pads. Brake noises are safety issues and require immediate attention.
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Where is the rattling noise in my car?

Start at the side of the car where you hear the rattle. Tap the bottom area of the door with a rubber mallet. If the door rattles, the noise is undoubtedly caused by a loose object lying in the door well. Remove the trim panel to get to the object.
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Why is my car making a rattling noise when I accelerate?

Rattling noises when accelerating can be caused by low fluid levels in the A/T. Open the hood and check the fluid level. If the car is running low on transmission fluid, refill the reservoir to the proper level. After doing this, start the car and take a short test drive to see if the problem goes away.
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Why does my car rattle in the front?

Do you hear a rattling noise under the car when driving? If you hear a rattling sound during any of these, it could mean you have a suspension problem which could include: a bad control arm bushing, bad ball joint, bad tie rod, bad strut mount, bad sway bar link, or bad sway bar bushings.
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What's that Rattle Under My Car?



Can a wheel bearing cause a rattling noise?

The most common and most easily identifiable symptom of a bad wheel bearing is an audible one. If you notice a grinding or grating noise coming from your wheel or tire, take note that this is very likely caused by a bad wheel bearing—especially if the noise gets louder as the vehicle accelerates.
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When I press on the gas I hear a rattling noise?

Often around the gas tank, muffler, exhaust piping, and exhaust manifold. This not only leaves them exposed to debris but moisture as well, which means they will likely develop problems with rust. You guessed it – if the damage is severe enough, it can cause your car to make a rattling sound when accelerating.
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Is it safe to drive with a rattling exhaust?

This can be dangerous so contact a certified mechanic right away. Driving with a loud muffler is potentially dangerous. If your muffler is loud because of a hole, rust, or other defect, carbon monoxide may be getting into the cabin of your vehicle. Carbon monoxide can be dangerous to you and your passengers.
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What does a loose exhaust sound like?

If you hear rattling under the car it could mean that the exhaust system has become misaligned. If you can hear a loud metallic vibration, it usually means that something is touching the exhaust pipe or that a clamp, support bracket or mounting is loose.
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Do all cars rattle?

Most cars experience some interior rattles on the dashboard, center console, glove compartment or other areas. The knobs and switches that operate these parts can break down. Natural wear and tear over time can make these rattles get louder, necessitating a repair.
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Why when I accelerate I hear a noise?

A loud squeaking or squealing noise while accelerating could mean there's a problem with your engine belt. It could mean the belt's loose or worn. Or it could mean that one of the belt's pulleys is starting to fail. A loud rumbling noise when accelerating might suggest there's a problem with your exhaust system.
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Can bad alignment cause rattling noise?

if they get worn, stuck or out of alignment, a rattling noise may be heard, especially at low rpms.
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Why does my front end rattle over bumps?

A heavy and dull “clunk” on large bumps: This often indicates an issue with the lower arm suspension bushes or the upper arm suspension bushes. A “rattle“ sound on light bumps (cracks in road): This is consistent with anti roll bar drop links that are worn out or that have snapped.
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Why is the back end of my car rattling?

If the rattling sound sounds like it is coming from underneath your vehicle, you likely are experiencing a problem with your exhaust system. Exhaust system problems include catalytic converter problems, muffler issues or corroded pipe, can sound like light rattling to rocks shaking beneath your car.
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What does a failing transmission sound like?

If the sound resembles humming, buzzing, or clunking, you may be experiencing transmission failure. Bad automatic transmissions may emit humming, buzzing, or whining noises while manual transmissions have harsher “clunking” sounds.
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What is rattling noise?

A rattling is a quick, often unsteady, burst of sounds. The sound of a rattlesnake is a good example of a rattling. You know how a baby rattle sounds? That kind of quick collection of sounds can be called a rattling. A rattling is disjointed and fast.
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How much does it cost to fix a rattling exhaust?

Based on U.S. pricing trends before discounts, it can cost from $30-$50 to at least $500 to repair or replace an exhaust system. The most common muffler repairs are patching holes, tightening a loose connection, and re-welding a dangling muffler back in place.
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What does a leaking catalytic converter sound like?

Rattling Noises. Your catalytic converter consists of small, honeycomb-shaped components that can cause a rattling sound when broken. If your catalytic converter is broken, this rattling should be loudest when the car starts, and should get worse over time.
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Can a catalytic converter make a rattling noise?

Rattling Noise – Once your catalytic converter becomes older or damaged from fuel mixtures, the honeycombs on the inside can begin to collapse and/or break apart which will cause a rattle to occur.
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How do you know if your exhaust is broken?

Signs of a Failing or Damaged Exhaust or Muffler
  1. Excessive Engine/Exhaust Noise. ...
  2. Reduced Fuel Economy. ...
  3. Slow Acceleration. ...
  4. Stench of Strong Gases. ...
  5. Banging or Knocking Sound Beneath the Vehicle. ...
  6. Rust Caused By Condensation. ...
  7. Engine Is Misfiring. ...
  8. A Burning Smell Coming From the Engine Bay.
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How do I stop my catalytic converter from rattling?

How to Quiet a Rattling Catalytic Converter
  1. Use High-Quality High Octane Fuel. ...
  2. Clean the Catalytic Converter With Sodium Hydroxide. ...
  3. Use Lacquer Thinner. ...
  4. Fix Loose Catalytic Converter Heat Shield. ...
  5. Cataclean Fuel and Exhaust System Cleaner. ...
  6. Sea Foam SS14 Cleaner and Lube. ...
  7. Replace a Catalytic Converter.
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Why does my exhaust make a rattling sound?

A rattling noise usually means that some part of the exhaust system is misaligned. A metallic vibration indicates that something is touching the exhaust pipe itself, or that the exhaust's mounting or support bracket is loose.
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How do you get rid of an exhaust rattle?

Though the loud sound of a muffler rattle might be fixed simply by tightening a couple of bolts or replacing a broken hanger, the corrosion might be bad enough on the muffler or neighboring parts that they will have to be replaced.
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