Mazda CX-9 Transmission Problems

The Mazda CX-9 is a popular and reliable SUV that’s been well-received by car enthusiasts and families alike. However, even the best cars can experience issues with their transmission system, and the CX-9 is no exception.

Whether you’re a proud CX-9 owner or in the market for one, it’s essential to understand the potential transmission problems and how to address them. This comprehensive article will explore the causes, symptoms, and solutions for Mazda CX-9 transmission problems.

From regular maintenance to DIY repairs and dealership services, we’ll cover all the essential information you need to keep your CX-9 running smoothly on the road. So, buckle up and get ready to dive into Mazda CX-9 transmission problems!

What Causes the Mazda CX-9 Transmission Problems?

Before going into the solution part and learning about different types of solutions to fix the transmission issues, I highly recommend reading the causes of the problem first. This will give you a better idea and help clear the bigger picture.

Several factors can cause transmission problems in the Mazda CX-9. Some of the most common causes include:

Low transmission fluid

Low transmission fluid is one of the most frequent causes of transmission problems in the CX-9. A low fluid level can cause the transmission to slip, shift erratically or overheat.

Low transmission fluid levels can cause the transmission to fail in extreme cases. As a car owner, you should regularly check your transmission fluid level to ensure it’s within the recommended range.

Faulty transmission control module (TCM)

Faulty transmission control module (TCM)

Another common cause of Mazda CX-9 transmission problems is a faulty TCM. The TCM computer controls the transmission’s shifting points and other functions.

A malfunctioning TCM can cause the transmission to shift erratically, delay or skip gears, or fail to engage altogether.

If you suspect a faulty TCM, it’s best to take your CX-9 to a certified mechanic for diagnosis and repair.

Worn-out clutch plates

The clutch plates are responsible for engaging and disengaging the transmission’s gears. Over time these plates can wear out and cause various transmission problems, including slipping, rough shifting, and strange noises.

If your CX-9 has high mileage or has been subjected to heavy use, the clutch plates may need to be replaced.

Malfunctioning torque converter

The torque converter is a vital component of the transmission system that helps transfer power from the engine to the transmission.

A malfunctioning torque converter can cause several issues, including slipping, shuddering, or even stalling the engine. In most cases, a faulty torque converter will need to be replaced.

Damaged transmission solenoids

Damaged transmission solenoids

Transmission solenoids regulate the flow of transmission fluid within the transmission system.

When these solenoids become damaged or clogged, they can cause various issues, including delayed or rough shifting, slipping gears, and overheating.

If you suspect a damaged transmission solenoid, it’s best to have it diagnosed and replaced by a certified mechanic.


Finally, transmission overheating can cause significant damage to the CX-9’s transmission system.

Various factors, including low fluid levels, dirty filters, or faulty cooling systems, can cause overheating.

To prevent overheating, it’s essential to maintain your CX-9’s cooling system and regularly check your transmission fluid levels.

What Are The Symptoms of Mazda CX-9 Transmission Problems

If you suspect that your Mazda CX-9 is experiencing transmission problems, there are several symptoms that you should look out for. These symptoms may include:

Slipping gears

Slipping gears occur when the transmission fails to engage or disengage a gear properly. This can cause the engine to rev higher than usual and make the car feel like losing power. Low fluid levels, worn-out clutch plates, or a faulty torque converter can cause slipping gears.

Delayed or rough shifting

If your CX-9’s transmission is experiencing delayed or rough shifting, it may feel like the car is jerking or lurching when changing gears. A faulty TCM, damaged transmission solenoids, or low fluid levels can cause this.


Overheating can cause several transmission problems, including slipping gears and delayed shifting. If your CX-9’s transmission is overheating, you may see warning lights on your dashboard or smell a burning odor. Low fluid levels, dirty filters, or faulty cooling systems can cause overheating.

Strange noises

Strange noises coming from your CX-9’s transmission can indicate potential problems. These noises may include whining, grinding, or clunking when changing gears. Worn-out clutch plates or damaged transmission solenoids can cause these noises.

Transmission fluid leaks

Transmission fluid leaks

If you notice fluid leaking from your CX-9’s transmission, it’s essential to address it immediately. Damaged seals, loose bolts, or faulty gaskets can cause leaks. Low fluid levels can cause transmission problems, including slipping gears and overheating.

Check engine light

If your CX-9’s check engine light comes on, it may indicate a problem with the transmission system. Various issues, including low fluid levels, faulty TCMs, or damaged transmission solenoids, can trigger the check engine light.

How to Diagnose The Mazda CX-9 Transmission Problems

If you’re experiencing transmission problems with your Mazda CX-9, it’s crucial to have the issue diagnosed on time. If you are a beginner, you may need help figuring out where to start the diagnostic operation.

If that’s it, here is a step-by-step guide on diagnosing the transmission problems on your Mazda CX-9.

Checking the Transmission Fluid

Checking the Transmission Fluid

One of the first steps in diagnosing transmission problems is to check the transmission fluid level and quality.

Low fluid levels, dirty fluid, or fluid that smells burnt can all indicate transmission issues. A mechanic will typically remove the dipstick, wipe it clean, and reinsert it to check the fluid level and quality.

Conducting a Diagnostic Scan

A diagnostic scan is another standard method for diagnosing transmission problems in the CX-9.

This involves connecting a diagnostic scanner to the vehicle’s onboard computer to check for any stored error codes or issues with the transmission system.

A mechanic can use the information gathered from the scan to determine the root cause of the transmission problem.

Road Test

A road test is another critical step in diagnosing transmission problems.

During the road test, a mechanic will take the vehicle for a test drive to check for any symptoms of transmission problems, such as slipping gears, delayed shifting, or strange noises.

They may also check for any vibrations or other issues that may indicate a problem with the transmission.

Visual Inspection

Finally, a visual inspection is another important method to diagnose transmission problems in the CX-9.

A mechanic will visually inspect the transmission system, looking for any signs of damage, wear, or leaks.

They may also check the condition of the clutch plates, torque converter, and other components to determine if they function correctly.

Transmission Maintenance Tips for Mazda CX-9

Proper maintenance of your Mazda CX-9’s transmission system is essential to ensure its longevity and prevent transmission problems. Let’s explore essential maintenance tips to keep your CX-9’s transmission in shape.

Regular Transmission Fluid Checks and Change

Regular Transmission Fluid Checks and Change

One of the essential maintenance tasks for your CX-9’s transmission system is regularly checking and changing the transmission fluid.

Most manufacturers recommend changing the fluid every 30,000 to 60,000 miles, but it’s always best to refer to your owner’s manual for specific recommendations.

In addition, it’s essential to regularly check the transmission fluid level and quality and add or replace fluid as needed.

Proper Use of the Transmission System

Another important aspect of transmission maintenance is to use the transmission system properly.

Avoid sudden acceleration or harsh braking, as this can stress the transmission system unnecessarily.

Additionally, it’s essential to come to a complete stop before shifting into reverse or drive and avoid shifting gears while the vehicle is in motion.

Avoiding Overloading and Overworking the Car

Overloading your CX-9 or overworking it can stress the transmission system unnecessarily, leading to premature wear and potential transmission problems.

Follow the manufacturer’s weight limits for cargo and passengers, and avoid towing loads that exceed the vehicle’s recommended towing capacity.

Keeping the Cooling System in Good Condition

Keeping the Cooling System in Good Condition

Finally, keeping the cooling system in good condition is essential to prevent transmission problems.

The transmission system generates a lot of heat, and a properly functioning cooling system is necessary to dissipate that heat and prevent overheating.

Regularly inspect and maintain the cooling system, including checking the radiator and coolant levels and ensuring proper airflow through the radiator.

What Are the Repair Options for Mazda CX-9 Transmission

While facing a transmission issue on your beloved vehicle can be a hectic experience, some people get startled easily. However, you don’t need to panic because I will give you some options to save you the time of need.

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DIY Repair

Some transmission problems can be fixed with simple repairs that you can do yourself, such as replacing a faulty sensor or solenoid.

However, having the proper knowledge and tools is vital to ensure the repair is done correctly. If you need more confidence in your ability to repair, it’s best to seek professional help.

Independent Auto Repair Shop

An independent auto repair shop can offer a more affordable alternative to dealership repair services.

These shops often have experienced mechanics trained to work on various vehicle makes and models, including the Mazda CX-9.

However, it’s important to research and finds a reputable shop with good reviews to ensure quality work.

Dealership Repair Services

Dealership repair services can be a good option for Mazda CX-9 transmission problems, especially if your vehicle is still under warranty.

Dealership mechanics are trained to work specifically on Mazda vehicles and have access to specialized tools and equipment.

However, dealership services tend to be more expensive than independent repair shops.

Rebuilding or Replacing the Transmission

Rebuilding or Replacing the Transmission

If your Mazda CX-9’s transmission is severely damaged, rebuilding or replacing the transmission may be necessary.

Rebuilding involves removing the transmission, replacing damaged or worn parts, and reassembling it.

Replacing involves swapping out the entire transmission with a new or refurbished one. Both options can be expensive, but rebuilding is often more affordable than replacing.

Read Our Experts Guide: Honda CR-V Transmission Problems

Last Minute Thoughts!

In this article, we discussed Mazda CX-9 transmission problems, their symptoms, causes, diagnosis, and repair options.

It’s important to stay aware of any potential transmission issues with your Mazda CX-9 and take action immediately to prevent further damage.

By following proper maintenance tips and seeking professional help when necessary, you can ensure that your Mazda CX-9’s transmission stays in good condition and avoids major problems.

I hope you have enjoyed reading this article and found it helpful. If there is still something on your mind please feel free to share it with me using the comment section below!

Thank you for reading!

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