Is it necessary to change CVT transmission filter?

Whether a CVT filter should be replaced depends on the transmission's design. Some CVTs have a replaceable filtration element that is swapped during a fluid service; others rely on a permanent screen that is not replaced. Always follow the vehicle manufacturer’s service guidelines.

Understanding CVT filter designs

Filtration in CVTs varies by model and manufacturer. Knowing the type helps determine maintenance needs and avoid damage from dirty fluid.

Common configurations

There are three broad categories you might encounter in CVTs:

• Replaceable filter element: Some CVTs include a dedicated filter cartridge that is intended to be replaced when the pan is opened or during a scheduled fluid change.


• Permanent screen or integrated filter: Other CVTs use a non-serviceable screen or an integrated filter that is cleaned or inspected but not replaced.


• No traditional filter in the pan area: A few designs rely primarily on internal screens and have no user-serviceable filter in the pan area.

In practice, the exact filtration design depends on the model, so checking the owner’s manual or service bulletin is essential.

Approach to CVT maintenance

When planning maintenance, follow a decision path that reflects your car’s design, fluid specification, and OEM guidance.

Decision flow

Before touching the CVT, verify whether a replaceable filter exists and what the service requires:

1. Consult the owner's manual or a dealer service bulletin for filter replacement intervals and service procedures.


2. Inspect the accessible filtration components during service: the pan, any filter cartridge (if present), and any screens; follow OEM guidelines to replace or clean them.


3. Choose the proper fluid service method: drain-and-fill, or a manufacturer-approved flush method; many CVT manufacturers caution against aggressive flushes that can dislodge debris, so adhere to guidelines.


4. Use the correct CVT fluid specification and properly reseal the pan and any plugs; if you replace a filter, ensure the gasket is replaced and torque specs are followed.

Adhering to OEM recommendations helps protect the CVT and maintain performance.

Summary

Is it necessary to change a CVT transmission filter? It depends on the design. If your transmission has a serviceable replaceable filter, it should be replaced as part of a proper fluid service. If it uses a permanent filter or no filter in the pan, cleaning and servicing are guided by OEM instructions. Always rely on the vehicle’s manual and a qualified technician for CVT maintenance to ensure reliability and longevity.

Does CVT transmission have a filter?

Yes, most Continuously Variable Transmissions (CVTs) have at least one filter, and sometimes two. These filters are crucial for trapping dirt and metal particles to protect the transmission. Their location varies by make and model; some are internal, requiring the removal of the oil pan, while others are external, found near the transmission's cooler lines.
 
This video demonstrates how to change the CVT fluid and filters in a Nissan Sentra: 57sMotorCarNutYouTube · Sep 13, 2025
Types of CVT filters

• Internal filters: These are typically located inside the transmission pan and are often referred to as strainers. 
• External filters: These are often found outside the transmission case, near the cooler lines. 
• Cartridge filters: Some CVTs use a cartridge-style filter, which is often located on the side of the transmission, sometimes accessible from the wheel well. 

Why replacement is important

• Protects the transmission: The filter traps contaminants that can cause wear and damage to the internal components of the CVT. 
• Ensures proper fluid quality: Regularly replacing the filter helps keep the new transmission fluid clean, preventing it from becoming contaminated quickly. 
• Follow manufacturer recommendations: It is best to follow the vehicle manufacturer's maintenance schedule, as filter replacement is an essential part of routine CVT maintenance. 

What to consider

• Filter location varies: The location of the filter depends on the specific vehicle model. You may need to consult your owner's manual or a service professional to confirm the exact location. 
• Service may be complex: Replacing an internal filter can be a more involved job that requires removing the transmission pan, and some external filters may be difficult to access. 
• Replace when changing fluid: It is highly recommended to replace the filter whenever you change the CVT fluid to ensure the new fluid remains clean. 

What happens if I don't change my CVT fluid?

If you don't change your CVT fluid, it will break down over time due to heat and friction, leading to a range of problems including overheating, slipping gears, delayed engagement, and rough shifting. Eventually, this can result in catastrophic transmission failure, requiring costly repairs that often exceed the cost of regular maintenance by thousands of dollars. 
How neglecting CVT fluid causes damage

• Fluid breakdown: The fluid loses its lubricating and cooling properties as it gets old and contaminated with wear particles. 
• Overheating: Without proper cooling, the transmission overheats, which causes internal damage. 
• Increased wear: Old, dirty fluid can't protect the metal parts inside the transmission, leading to accelerated wear on gears and other components. 
• Performance issues: The transmission may start slipping, shift poorly, or have delayed engagement. 

Consequences of not changing the fluid

• Increased risk of failure: The gradual damage from old fluid can lead to complete transmission failure. 
• Expensive repairs: Replacing a failed transmission is a major expense, far greater than the cost of regular fluid changes. 
• Reduced performance: Even before total failure, you will likely notice a decline in performance and shifting quality. 

What happens if I don't change my transmission filter?

If you don't change the transmission filter, it can become clogged with debris and metal shavings, restricting fluid flow and potentially causing overheating, erratic shifting, slipping, and eventual transmission failure. This can lead to costly repairs or the need for a complete transmission replacement.
 
This video explains the importance of changing the transmission filter to prevent potential catastrophic failure: 1mThe Auto StationYouTube · May 27, 2025
What happens when the filter is not changed

• Clogging: The filter traps dirt, metal shavings, and other contaminants from the transmission fluid. Over time, it can become completely clogged. 
• Reduced fluid flow: A clogged filter restricts the flow of clean transmission fluid, which is essential for lubricating, cooling, and operating the transmission components. 
• Overheating: The restricted fluid circulation can cause the transmission to overheat, which can damage internal parts. 
• Component wear: Metal particles and debris can circulate in the fluid and cause increased friction, wear, and damage to the transmission's internal parts. 
• Performance issues: You may experience a range of problems, including delayed or harsh shifting, slipping between gears, and erratic gear changes. 

How to tell if the filter needs changing

• Strange noises: Listen for grinding, clunking, or rattling sounds coming from the transmission. 
• Burning smell: A burnt odor from the transmission fluid can indicate overheating. 
• Dark or dirty fluid: The transmission fluid may look darker than normal, or you may see metal shavings in it. 
• Performance problems: Noticeable issues like slipping between gears or hesitant shifting are also key signs. 

This video discusses the symptoms of a failing transmission filter: 46sAnderson's GarageYouTube · Aug 27, 2023
Important considerations

• Follow the manufacturer's schedule: The best practice is to follow the vehicle manufacturer's recommended service interval for changing the transmission fluid and filter. 
• Change fluid and filter together: It's best to replace the filter whenever you change the transmission fluid, as the new fluid will dislodge debris from components. 

Which years of Nissan CVT to avoid?

Years of Nissan models with Continuously Variable Transmissions (CVTs) to avoid include roughly 2008-2018, as they were prone to widespread issues like transmission failure, overheating, and other problems that led to class-action lawsuits and recalls. Specific model years to be particularly cautious of across different Nissan lines are often cited as 2008-2013 for early models and 2014-2018 for later ones, although problems have been reported in various models even after 2018.
 
Years to avoid

• 2008–2013: These years are known for severe CVT failures, often occurring before 100,000 miles, as well as other electrical and mechanical issues. 
• 2014–2018: While Nissan made improvements, these years still experienced transmission issues, with many models involved in class-action lawsuits and recalls for problems like hesitation, overheating, and outright failure. 
• Specific models:
  • Altima: 2010–2018, 2013-2019 
  • Rogue: 2008, 2011, 2014-2016, 2014-2018 
  • Sentra: 2012–2017, 2013-2019 
  • Pathfinder: 2013–2019, 2015-2018 
  • Versa: 2013–2019 
  • Murano: 2010–2019 

What to do if you have a Nissan CVT

• Follow the manufacturer's recommended maintenance schedule, especially for transmission fluid changes, to maximize its lifespan. 
• Consider a pre-purchase inspection if you are considering buying a used model. 
• If a problem is suspected, contact a dealership to see if your vehicle is covered under an extended warranty or has any open recalls.