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Lexus CT Transmission Fluid Capacity

Lexus CT Transmission Fluid Capacity

The Lexus CT 200h isn’t just any vehicle; it’s a testament to Lexus’ commitment to creating luxurious, efficient, and environmentally-friendly vehicles. As one of the premier compact hybrid hatchbacks, it masterfully combines opulence with economy, delivering a serene driving experience coupled with commendable fuel efficiency.

Often overshadowed by more apparent features, the transmission fluid in a vehicle is much like the unsung hero of an epic tale. While it doesn’t garner as much attention as the engine or exterior design, its role is pivotal.

Ensuring smooth gear transitions, maintaining the health of the transmission, and by extension, impacting the overall performance of the car, it truly is a silent performer.

2011-2017 Lexus CT 200h Transmission Fluid Capacity And Transmission Fluid Type

The Lexus CT 200h, with its hybrid system, uses a specialized transmission fluid designed to meet the demands of its Continuously Variable Transmission (CVT) and the unique requirements of a hybrid powertrain. Let’s delve into the specifics for each generation.

Lexus CT 200h transmission fluid recommendation

1st Gen (ZWA10) 2011-2013:

  • Gearbox: P410 CVT.
  • Fluid Capacity: Typically, the total fluid capacity is approximately 3.6 quarts (3.4 liters), but it’s always recommended to consult the vehicle’s manual or a certified Lexus technician when replacing or topping up the fluid.
  • Fluid Type: Toyota Genuine ATF WS (Automatic Transmission Fluid World Standard).

1st Gen (ZWA10) Facelift 2014-2017:

  • Gearbox: P410 CVT.
  • Fluid Capacity: The fluid capacity remains consistent at around 3.6 quarts (3.4 liters).
  • Fluid Type: Toyota Genuine ATF WS. Using the manufacturer-recommended fluid ensures the transmission and hybrid system’s longevity and optimal performance.

In both the original and facelifted versions of the 1st Generation CT 200h, the emphasis is on using the correct type of fluid. As hybrid technology evolves, so do the formulations of the fluids that support them.

Therefore, always ensure that you’re using the latest specifications as detailed in the vehicle’s service manual or from information provided by Lexus.

The Vitality of Transmission Fluid

Hybrid vehicles, such as the CT 200h, have a unique powertrain that integrates both an internal combustion engine and an electric motor. This synergy requires components that work seamlessly together.

The transmission fluid is one such component that plays a dual role – it not only facilitates effortless gear shifts for the gasoline engine but also assists in cooling electric motor components, ensuring optimal efficiency and longevity.

The importance of the transmission fluid is further accentuated when one considers the continuous variable transmission (CVT) in the Lexus CT 200h. Unlike traditional automatic transmissions with set gears, a CVT offers an infinite range of gear ratios.

This adaptability allows for smoother acceleration and enhanced fuel efficiency but also means the transmission fluid’s quality and level need to be at their best to handle the varied and constant adjustments.

Risks of Overlooking Transmission Fluid Maintenance

While the CT 200h is engineered for excellence, neglecting transmission fluid maintenance can have consequences. Using incorrect or degraded fluid can lead to:

  • Rough or erratic shifting patterns, diminish the seamless driving experience.
  • Overheating of the transmission due to poor lubrication or cooling capabilities potentially leads to expensive damages.
  • Reduced fuel efficiency, as the transmission cannot optimize gear ratios effectively.
  • Premature wear and potential failure of transmission components.

In essence, while the transmission fluid might seem like a small component of the grand design, its upkeep is crucial for the Lexus CT 200h to continue offering its signature blend of elegance and efficiency.

Steps for Checking and Replacing Transmission Fluid in Lexus CT 200h

The hybrid technology of the Lexus CT 200h makes its transmission fluid crucial for optimal performance. Here’s a guide to help you ensure your transmission fluid is in the best condition:

Recognizing Symptoms of Compromised Fluid

a. Transmission Slipping: If you feel a loss of power or inconsistent acceleration, it may be due to the transmission not effectively shifting through its power band.

b. Delayed or Hard Shifts: While the CT 200h uses an eCVT and doesn’t have traditional “gears,” an unresponsive feel or lag can still indicate degraded fluid.

c. Noisy Transmission in Neutral: A noticeable sound, especially a humming, when the car is idling in neutral might signal a fluid issue.

d. Dark or Burnt Fluid: Healthy transmission fluid is typically a clear, bright red. If you find the fluid to be dark brown or have a burnt smell, it needs attention.

e. Check Engine or Transmission Warning Lights: These can be indicative of various issues, but a common cause is transmission fluid problems.

Procedure for Effective Draining and Refilling

Preparing the Vehicle:

  • i. Ensure the car is on a level surface.
  • ii. Use protective gloves and eyewear.
  • iii. Warm up the engine to operating temperature to ensure the fluid is in a more liquid state, making it easier to drain.

Draining Old Fluid:

  • i. Position a drain pan beneath the transmission drain plug.
  • ii. Remove the drain plug using the appropriate tool (usually a socket or wrench) and let the fluid drain out.
  • iii. Once drained, replace the drain plug. Make sure to replace the washer if it’s worn or damaged.

Refilling New Fluid:

  • i. Locate the transmission fluid dipstick in the engine bay. This is where you’ll refill the fluid.
  • ii. Using a funnel, pour in the specified amount of the recommended Toyota Genuine ATF WS fluid.
  • iii. Periodically check the fluid level using the dipstick, ensuring not to overfill.

Checking the Fluid Level:

  • i. After refilling, start the engine and let it run for a few minutes.
  • ii. With the parking brake engaged, shift through all the gears, pausing for a few seconds on each. Return to ‘Park’ or ‘Neutral.’
  • iii. Check the fluid level with the dipstick. It should be between the “HOT” marks if the engine is at operating temperature.

Final Steps:

  • i. Replace the dipstick securely.
  • ii. Check for any leaks around the drain plug and where the dipstick enters the transmission.
  • iii. Dispose of the old fluid appropriately, considering environmental guidelines.

It’s always beneficial to consult your vehicle’s service manual for specific details or any unique steps that might apply to your model year.

FAQs: Clarifying Frequent Concerns about CT 200h Transmission Fluid

Q1: How often should I change the transmission fluid in my Lexus CT 200h?

A: Typically, for hybrid vehicles like the CT 200h, it’s recommended to change the transmission fluid every 60,000 to 90,000 miles.

However, always consult your owner’s manual or a Lexus service expert for guidance tailored to your specific driving conditions.

Q2: Is there a difference between regular transmission fluid and that for hybrid vehicles?

A: Yes, hybrid vehicles often require a specific type of transmission fluid that caters to the unique demands of hybrid powertrains. For the CT 200h, the recommended fluid is Toyota Genuine ATF WS.

Q3: Can I use another brand of transmission fluid in my CT 200h?

A: While there are other brands that might meet or exceed the ATF WS specification, it’s always safest to use the manufacturer-recommended fluid to ensure optimum performance and prevent potential transmission issues.

Q4: What are the signs that my transmission fluid is low or needs changing?

A: Symptoms might include an unresponsive transmission, noises when in neutral, dark or burnt-looking fluid, or transmission warning lights on the dashboard.

Q5: Is changing the transmission fluid a DIY job or should I consult a professional?

A: While it’s possible for individuals familiar with car maintenance to change the transmission fluid, due to the CT 200h’s hybrid nature and the importance of the fluid, it might be preferable to consult a Lexus service center or a professional mechanic.

Q6: How much transmission fluid does the CT 200h hold?

A: The fluid capacity can vary slightly depending on the model year and specific conditions like temperature. It’s essential to refer to your owner’s manual or a Lexus expert for the exact capacity.

Q7: Can old or degraded transmission fluid harm my vehicle?

A: Absolutely. Old or degraded fluid can lead to increased wear and tear on the transmission components, possibly resulting in reduced performance, compromised fuel efficiency, and even transmission damage in extreme cases.


The Lexus CT 200h elegantly balances style, efficiency, and performance, a testament to Lexus’s dedication to excellence in every facet of their vehicles. As owners or potential owners of this hybrid marvel, understanding the intricacies of its operation becomes paramount.

Among these intricacies, the role of transmission fluid often stands understated, yet its importance cannot be overstated.

Transmission fluid acts as the lifeblood of the transmission system, ensuring that gears change smoothly and efficiently, particularly critical in a hybrid vehicle where seamless operation between electric and gasoline power sources is essential.

When properly maintained, this fluid ensures that the CT 200h delivers the signature Lexus driving experience – quiet, smooth, and responsive.

However, like any component in a vehicle, transmission fluid has its life span. As time passes and miles accumulate, its properties can degrade, leading to less efficient operation, potential wear, and in some unfortunate cases, significant damage.

Therefore, for those who prioritize their vehicle’s performance and longevity, regular checks and timely maintenance of the transmission fluid become rituals of responsible ownership.


About Thomas Bradfork

As a certified automotive mechanic with over 20 years of experience, Thomas specializes in Asian vehicles, particularly those from Japan and Korea. His vast knowledge and hands-on experience with brands like Kia, Hyundai, Honda, Subaru and Toyota have given him an intricate understanding of their design philosophy and technical nuances.

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