Lexus UX Transmission Fluid Capacity

The automotive world has witnessed a surge in the popularity of compact crossovers, and among them, the Lexus UX stands out as a beacon of luxury, style, and innovation. Positioned as the gateway into the world of Lexus luxury, the UX combines the agility of a hatchback with the elevated stature of an SUV.

Its sharp, futuristic design is not just skin deep, as beneath that refined exterior lies a heart crafted with precision and care.

As the human body relies on blood to function, vehicles depend on transmission fluid for smooth operations. Especially for a vehicle like the Lexus UX, which is designed to offer a premium driving experience, ensuring the transmission fluid is in its optimal state is crucial.

This fluid serves as both a lubricant and coolant for the gearbox, enabling smooth gear changes, minimizing wear and tear, and preventing the transmission system’s overheating.

Maintaining the fluid’s integrity ensures that the vehicle performs at its peak, giving the driver a seamless and enjoyable ride.

2021 Lexus UX
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2019-2022 Lexus UX Transmission Fluid Capacity And Transmission Fluid Type

Here’s the general transmission fluid information for the Lexus UX:

(Note: Always refer to the owner’s manual for the exact specifications.)

Lexus UX200 owners manual
  • Lexus UX 200 (2.0L Inline-4 M20A-FKS Engine)
    • Transmission: CVT
    • Fluid Type: Toyota Genuine CVT Fluid FE
    • Fluid Capacity:
      • Total Fill: Approximately 9 quarts (8.5 liters)
  • Lexus UX 250h (2.0L Inline-4 Hybrid M20A-FXS Engine)
  • Fluid Type: Toyota Genuine ATF WS
  • Fluid Capacity:
    • Total Fill: Varies based on hybrid system cooler and lines. Typically around 4 quarts (3.8 liters)

It’s always crucial to ensure you’re using the recommended transmission fluid type. Incorrect or low-quality fluid can cause premature wear or damage to the transmission components.

For the exact transmission fluid capacity and type for your specific Lexus UX model and its driving conditions, always refer to the vehicle’s owner’s manual or consult with a Lexus dealer.

Grasping the Significance of Transmission Fluid

The transmission system is one of the most intricate parts of a vehicle, comprising numerous components working in harmony to transfer power from the engine to the wheels. For the system to function smoothly, each component must be well-lubricated, which is where the transmission fluid comes into play.

When in good condition, the fluid ensures that gear changes, whether automatic or manual, are swift and smooth. This directly translates to a responsive and enhanced driving feel, something that every Lexus UX owner would appreciate.

Neglecting transmission fluid maintenance can lead to a myriad of issues. Firstly, degraded or low levels of fluid can cause hard or jerky gear shifts, which impacts the vehicle’s overall performance and driving experience. Additionally, if left unchecked, it could lead to increased friction between transmission components, causing premature wear and potentially expensive repairs.

Over time, contaminants can accumulate in the fluid, which can further damage the transmission. In the worst-case scenario, complete transmission failure could occur, leading to hefty repair bills. Hence, regular checks and timely fluid changes are not just recommended but are essential for the longevity and performance of the Lexus UX.

Procedure to Check and Replace Transmission Fluid

Before diving into the process of replacing the transmission fluid, it’s crucial to recognize the signs indicating that the fluid might be in bad shape or at a lower level than desired. Some of these symptoms include:

  1. Delayed or Jerky Gear Shifts: If your Lexus UX seems to hesitate before changing gears or does so with a jerk, this could be an indicator that the transmission fluid is not lubricating the system effectively.
  2. Noises: Grinding, whining, or clunking noises while the vehicle is in gear might hint at low or old transmission fluid.
  3. Overheating: The transmission fluid serves as a coolant. If the gearbox gets hotter than usual, it could be because the fluid isn’t performing its cooling function optimally.
  4. Transmission Slipping: If the vehicle unexpectedly changes gears without any input, it might be a sign of low fluid levels.
  5. Unusual Smell or Cloudy Fluid: If you notice a burnt smell coming from the transmission fluid or if the fluid appears cloudy, it’s time for a change.

Comprehensive Steps for Draining and Refilling

  1. Safety First: Always ensure that the vehicle is on a level surface. Use jack stands if you need to elevate the car. Ensure the engine is cool to avoid burns.
  2. Checking the Fluid Level: Remove the transmission dipstick, wipe it clean with a lint-free cloth, re-insert it, then pull it out again to check the level. The fluid should be between the two marked areas. If it’s below or has contaminants, consider changing it.
  3. Draining the Old Fluid: Position a drain pan beneath the transmission fluid pan. Unscrew the drain plug, allowing the fluid to empty into the pan. It’s advisable to wear gloves and safety glasses during this process.
  4. Removing the Transmission Pan: Once drained, remove the transmission pan. This gives access to clean the pan and replace the filter, which is essential for maintaining fluid purity.
  5. Replace the Filter: Remove the old filter, generally held in place by a few screws. Replace it with a new one, ensuring it fits securely.
  6. Reinstall the Transmission Pan: Clean the pan thoroughly before reinstalling it. Ensure that the gasket surface is clean and place a new gasket. Reattach the pan, tightening the bolts in a crisscross pattern to ensure even pressure.
  7. Refill with New Fluid: Using a funnel, pour the new transmission fluid into the dipstick tube. Refer to the vehicle’s manual for the correct type and quantity of fluid.
  8. Run the Engine: After refilling, start the engine and let it run for a few minutes. This circulates the new fluid and helps identify if there are any leaks.
  9. Check the Level Again: Turn off the engine and check the fluid level using the dipstick. Add more if necessary.
  10. Dispose of Old Fluid Properly: It’s essential to dispose of the old transmission fluid responsibly. Most local auto parts stores or recycling centers will accept used transmission fluid.

Regularly checking and replacing the transmission fluid can significantly extend the lifespan of your Lexus UX’s transmission system and ensure a smooth driving experience.

How Much Does It Cost To Change Transmission Fluid In Lexus UX?

The cost to change the transmission fluid in a Lexus UX can vary based on several factors, including your geographical location, the specific service center or mechanic you choose, and whether any additional services are performed at the same time. However, I can provide you with a general estimate.

For the Lexus UX:

  1. Parts: The cost for the transmission fluid itself might range from $20 to $50 per quart, depending on the quality and brand. Given that a vehicle may require several quarts, this can add up.
  2. Labor: Labor costs can vary widely but typically range from $100 to $200 for a transmission fluid change on luxury vehicles like Lexus, depending on your location and the specific service provider.
  3. Total Estimated Cost: Given the above, a rough estimate would be between $200 to $300 for the entire service.

Frequently Asked Questions

  1. How often should I change the transmission fluid in my Lexus UX?
    Answer: Typically, for most vehicles, it’s recommended to change the transmission fluid every 30,000 to 60,000 miles. However, always refer to your Lexus UX owner’s manual for the manufacturer’s specific recommendations.
  2. Can I use any type of transmission fluid for my Lexus UX?
    Answer: No, it’s essential to use the type of transmission fluid recommended by Lexus for the UX model. Using the wrong type can result in suboptimal performance and potential damage.
  3. Is it normal for the transmission fluid to be dark in color?
    Answer: Over time, transmission fluid can darken due to contaminants and wear. If the fluid is very dark or has a burnt smell, it’s a sign that it needs to be changed.
  4. Can I mix old and new transmission fluid?
    Answer: While it’s technically possible, it’s not recommended. Mixing old and new fluid dilutes the effectiveness and quality of the new fluid.
  5. How do I know if my transmission fluid is low?
    Answer: Symptoms of low transmission fluid include delayed or jerky gear shifts, unusual noises from the transmission, overheating, or the vehicle unexpectedly changing gears.
  6. Can I change the transmission fluid myself?
    Answer: While it’s possible for individuals familiar with car maintenance to change the transmission fluid themselves, if you’re unsure or lack the necessary tools, it’s always best to have it done by a professional.
  7. Does Lexus UX have a transmission fluid dipstick?
    Answer: Some newer models of vehicles, including certain Lexus models, might not have a traditional dipstick for checking transmission fluid. Always consult your owner’s manual to understand the correct procedure for checking the fluid in your specific model.
  8. What happens if I neglect to change the transmission fluid?
    Answer: Neglecting to change the transmission fluid can result in decreased performance, increased wear on the transmission, overheating, and in extreme cases, complete transmission failure.


The Lexus UX, as a paradigm of compact luxury crossovers, stands as a testament to Lexus’s commitment to superior driving experiences. Much of this experience, beyond the impeccable design and innovative tech features, hinges on the smooth and seamless operation of its transmission. This seamless operation, in turn, relies heavily on the quality and condition of the transmission fluid.

Regular checks of the transmission fluid are not just a cursory maintenance task but an essential ritual to ensure that the Lexus UX performs at its peak. Overlooking this seemingly small aspect can result in pronounced problems down the line, affecting the vehicle’s performance, longevity, and overall driving pleasure.

Moreover, using quality fluids specifically recommended for the Lexus UX is paramount. The right transmission fluid is like the lifeblood of the vehicle’s transmission system, ensuring smooth gear shifts, optimal fuel efficiency, and prevention of undue wear and tear. It aids in maintaining the crisp acceleration and smooth driving dynamics that Lexus owners have come to cherish.

In conclusion, owning a luxury vehicle like the Lexus UX comes with the responsibility of regular maintenance. Ensuring that the right transmission fluid is used and replaced at the recommended intervals is foundational to uphold the driving elegance that the UX promises.

It’s a small investment of time and care that pays off manifold in terms of performance, driving satisfaction, and vehicle longevity.

References and Resources

  1. Official Lexus Service Manuals: These comprehensive guides, designed and curated by the experts behind the creation of the Lexus UX, are the definitive source of technical information. Whether you’re looking to understand fluid capacities, replacement intervals, or even the nitty-gritty of the transmission system, these manuals serve as the ultimate reference point. They can typically be sourced from official Lexus dealerships or the Lexus website.
  2. Leading Online Lexus Forums: Beyond the official literature, there’s a vibrant community of Lexus enthusiasts and experts online who share insights, experiences, and recommendations. Forums are a treasure trove of real-world experiences and hands-on advice.
    Websites like ClubLexus, Lexus Enthusiast, and Lexus Owners Club are some of the foremost platforms where owners come together to discuss their vehicles. Here, you can find discussions on best practices, personal experiences with transmission fluid changes, and recommendations on brands and techniques.


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