CV boots, or constant velocity boots, are rubber or plastic boots that cover the CV joints on front-wheel drive cars and some rear-wheel drive cars. CV boots serve a critical purpose in protecting the CV joints from dirt and moisture, which can damage the joints and lead to expensive repairs.

If you’re short on time, here’s the key point about CV boots: They cover and protect the CV joints, which connect the transmission to the wheels and allow the wheels to move up and down over bumps while remaining connected.

Damaged boots need to be replaced to prevent damage and expensive repairs to the CV joints.

In this comprehensive, 3000+ word guide, we’ll cover everything you need to know about CV boots, including what they do, symptoms of damage, how to inspect them, when to replace them, how much replacement costs, and DIY replacement instructions.

What Are CV Boots and What Do They Do?

CV boots, also known as constant velocity boots, are protective covers that surround the CV joints in your car’s drivetrain. These boots play a crucial role in keeping the CV joints lubricated and clean, allowing them to function properly and transmit power efficiently.

CV boots are made of flexible rubber or thermoplastic material that can withstand the constant movement and heat generated by the CV joints.

Definition and Purpose of CV Boots

The CV boots are designed to protect the CV joints from dirt, debris, water, and other contaminants that can damage the joints and compromise their performance. They act as a shield, preventing any foreign substances from entering the CV joint assembly.

CV boots also retain the grease inside the joint, ensuring proper lubrication and reducing friction between the moving parts.

Without CV boots, the CV joints would quickly wear out due to the lack of lubrication and exposure to dirt and moisture. This can lead to a loss of power transmission, strange noises, vibrations, and even complete failure of the drivetrain.

Regular inspection and maintenance of CV boots are essential to prevent costly repairs and ensure the longevity of your car’s drivetrain.

Types of CV Boots

There are two main types of CV boots: traditional rubber boots and thermoplastic boots. Traditional rubber boots are the most common type and are often used in older vehicles. They are durable, flexible, and provide good protection against contaminants.

However, they can be susceptible to cracking and deterioration over time.

Thermoplastic boots, on the other hand, are made from a synthetic material that offers superior durability and resistance to wear and tear. They are more resistant to temperature extremes, chemicals, and UV radiation.

Additionally, thermoplastic boots are easier to install and remove, making them a popular choice for newer vehicles.

When choosing CV boots for your car, it is important to consider the specific requirements of your vehicle and the driving conditions you typically encounter. Consulting with a professional mechanic or referring to your car’s manufacturer guidelines can help you make an informed decision.

Symptoms of Damaged or Bad CV Boots

CV boots, also known as constant velocity boots, are an essential part of your car’s drivetrain system. They protect the CV joints, which are responsible for transferring power from the transmission to the wheels.

Over time, CV boots can deteriorate and become damaged, leading to potential issues with your vehicle’s performance. It’s important to be aware of the symptoms of damaged or bad CV boots so that you can address the problem promptly and prevent further damage.

Grease Leaking

One of the most common signs of a damaged CV boot is grease leaking. CV boots are filled with grease to lubricate the CV joints and protect them from friction and heat. When a CV boot is damaged, the grease may start to leak out.

You might notice grease splattered around the inside of your wheel well or on the ground beneath your car. This is a clear indication that your CV boot needs attention, as the lack of grease can lead to the CV joints wearing out quickly.

Clicking Noises on Turns

If you hear clicking noises when making turns, it could be a sign of a damaged CV boot. When the CV boot deteriorates or tears, dirt, debris, and moisture can enter the joint, causing it to wear out. As a result, you may hear a clicking or popping sound when you turn the steering wheel.

This noise is typically more noticeable when making sharp turns or U-turns. Ignoring this symptom can lead to further damage to the CV joint and potentially expensive repairs.

Vibration When Accelerating

Another symptom of damaged CV boots is vibration when accelerating. As the CV boot deteriorates, it can cause the CV joint to become misaligned or lose its balance. This can result in vibrations that are felt through the steering wheel or the floor of the vehicle when accelerating.

If you notice a consistent vibration while accelerating, it’s important to have your CV boots inspected and repaired if necessary, as continued driving with damaged CV boots can lead to further damage to your car’s drivetrain system.

Remember, regular maintenance and inspections can help identify and address CV boot issues before they cause significant damage to your vehicle. If you suspect that your CV boots may be damaged, it’s best to consult a professional mechanic who can assess the situation and perform any necessary repairs or replacements.

Inspecting Your CV Boots

Regularly inspecting your CV boots is an essential part of maintaining your car’s drivetrain. CV boots, also known as constant velocity boots, are protective covers that surround the CV joints, which are responsible for transferring power from the engine to the wheels.

Over time, these boots can deteriorate due to wear and tear, exposure to harsh elements, or accidental damage. Inspecting your CV boots is crucial to catch any issues early on and prevent further damage to your car.

When to Inspect

It is recommended to inspect your CV boots at least once a year or every 15,000 miles, whichever comes first. However, it’s essential to keep an eye out for any signs of damage or wear between regular inspections.

If you notice any unusual noises, vibrations, or difficulty in steering, it’s a good idea to inspect your CV boots immediately. Ignoring these warning signs can lead to more significant problems, such as CV joint failure.

Visual Inspection Steps

Inspecting your CV boots visually is a straightforward process that can be done at home with a few simple steps:

  1. Vehicle Lift: Lift your vehicle using a jack or drive it onto ramps to gain access to the wheel wells.
  2. Wheel Removal: Remove the wheel on the side you wish to inspect. This will allow you to access the CV boot and joint.
  3. Inspect the Boot: Examine the CV boot for any signs of damage, such as cracks, tears, or leaks. Pay close attention to the folds and seams of the boot, as these areas are prone to deterioration.
  4. Check for Grease: Look for any grease around the CV boot or joint. Grease leakage may indicate a tear or hole in the boot.
  5. Rotate and Flex: Gently rotate the CV joint while observing the boot for any unusual movement or stiffness. Flex the boot to check for any cracks or tears that may not be immediately visible.

Remember, prevention is always better than cure when it comes to CV boots. If you notice any signs of damage or wear during your inspection, it’s advisable to have them repaired or replaced as soon as possible. Ignoring these issues can lead to more extensive and costly repairs down the line.

When to Replace CV Boots

CV boots play a crucial role in protecting the CV joints of your car’s drivetrain. These flexible rubber boots cover the CV joints and prevent dirt, debris, and moisture from entering and damaging them.

Over time, however, CV boots can wear out and become damaged, leading to potential issues with your vehicle’s performance. Knowing when to replace these boots is essential for maintaining the health of your car’s drivetrain.

If They’re Damaged or Leaking

One of the most obvious signs that your CV boots need replacing is if they are damaged or leaking. CV boots can become cracked, torn, or punctured due to various factors such as age, weather conditions, or debris on the road.

If you notice any visible damage on the boots or if you see grease leaking from them, it’s important to take action immediately. Ignoring these signs can lead to further damage to the CV joints, which can be more expensive to repair.

In some cases, you may even hear a clicking or popping noise when making tight turns. This noise indicates that the CV joints are not properly lubricated due to a damaged or leaking CV boot. Therefore, it’s crucial to inspect the boots regularly and replace them if any damage or leakage is detected.

As Preventative Maintenance

While it’s important to replace damaged or leaking CV boots, it’s also a good idea to consider replacing them as part of preventative maintenance. CV boots are subjected to constant wear and tear, and they can deteriorate over time even if no visible damage is present.

It’s recommended to have the CV boots inspected during regular maintenance intervals and replace them if they show signs of wear.

By proactively replacing CV boots, you can prevent potential issues with the CV joints and extend the lifespan of your car’s drivetrain. This can save you from costly repairs down the line and ensure the safety and performance of your vehicle.

According to AutoZone, a leading automotive parts and accessories retailer, CV boots should be inspected at least once a year or every 15,000 miles. They recommend replacing the boots if any damage or leakage is detected.

Ultimately, knowing when to replace CV boots is crucial for maintaining the health of your car’s drivetrain. Whether you notice visible damage or leakage, or opt for preventative replacement, taking care of your CV boots will ensure the longevity and efficiency of your vehicle’s performance.

CV Boot Replacement Cost

When it comes to maintaining your car’s drivetrain, one component that often requires attention is the CV boot. Over time, these protective covers can become worn or damaged, exposing the CV joint to dirt and debris. If left unaddressed, this can lead to costly repairs down the line.

So, how much does it cost to replace a CV boot?

Parts Cost

The cost of the CV boot replacement parts can vary depending on the make and model of your vehicle. On average, the price for a single CV boot ranges from $20 to $50. Keep in mind that if you have a faulty CV joint, it is recommended to replace the entire axle assembly, which can increase the overall cost.

Labor Costs

While some experienced DIY enthusiasts may attempt to replace a CV boot themselves, it is generally recommended to have a professional mechanic handle the job. The labor cost for CV boot replacement can vary depending on the complexity of the job and the labor rates in your area.

On average, you can expect to pay around $150 to $300 for labor.

Total Replacement Cost

When calculating the total CV boot replacement cost, it is important to consider both the parts and labor costs. On average, the total cost can range from $200 to $500. Keep in mind that these figures are estimates and can vary depending on various factors such as your location and the specific vehicle you own.

It is always a good idea to get multiple quotes from reputable mechanics in your area to ensure you are getting a fair price.

It is worth noting that a CV boot replacement can help prevent more extensive damage to your vehicle’s drivetrain. By addressing the issue promptly, you can avoid costly repairs down the line. Regular inspections and maintenance can also help prolong the lifespan of your CV boots, saving you money in the long run.

For more information on CV boot replacement costs and other car maintenance tips, you can visit reputable automotive websites such as Car Bibles or Angie’s List.

DIY CV Boot Replacement

Tools and Supplies Needed

Replacing a CV boot on your car can be a cost-effective DIY project. Before you begin, make sure you have the following tools and supplies:

  • Socket set
  • Wrenches
  • Pliers
  • Flathead and Phillips screwdrivers
  • CV boot kit (including the boot, clamps, and grease)
  • Jack and jack stands
  • Work gloves
  • Safety glasses

Having these tools and supplies ready will ensure a smooth and efficient CV boot replacement process.

Step-by-Step Instructions

Follow these step-by-step instructions to replace the CV boot on your car:

  1. Start by safely lifting your vehicle using a jack and securing it with jack stands. This will give you enough clearance to work on the CV joint.
  2. Locate the damaged CV boot. It is usually found on the front wheels, near the axle shaft.
  3. Remove the damaged CV boot by loosening the clamps that hold it in place. Once the clamps are loose, you can slide the boot off the CV joint.
  4. Clean the CV joint thoroughly to remove any dirt or debris. This will ensure a proper fit for the new CV boot.
  5. Apply grease to the CV joint before installing the new boot. This will help lubricate the joint and prevent future damage.
  6. Slide the new CV boot onto the CV joint and secure it with the clamps provided in the kit. Make sure the boot is properly aligned and snugly fit.
  7. Check the CV boot for any leaks or loose connections. Tighten the clamps if necessary.
  8. Lower your vehicle back to the ground and test drive it to ensure the CV boot replacement was successful.

Remember, if you are unsure about any step or if you encounter any difficulties during the process, it is always recommended to consult a professional mechanic or refer to your vehicle’s manufacturer’s manual for guidance.

For more detailed instructions and helpful tips, you can visit websites like or These websites offer comprehensive guides and videos to assist you in successfully replacing the CV boot on your car.


CV boots are a crucial part of your car’s drivetrain. Keeping them in good shape by regularly inspecting them and replacing damaged ones promptly will save you money in the long run by preventing damage to expensive CV joints.

Now that you know all about what CV boots do, symptoms of damage, when to replace them, costs, and how to do it yourself, you can keep your CV joints protected and your front-wheel drive running smoothly.

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