2012 subaru impreza transmission problems

So, you're here because you're likely experiencing some not-so-fun issues with your 2012 Subaru Impreza's transmission. Don't worry, you're not alone. While the Impreza is generally a reliable car, the 2012 model year, in particular, has been known to have its fair share of transmission woes. Understanding these problems is the first step to getting your Subaru back on the road, running smoothly.

Let's dive into the common transmission problems plaguing the 2012 Impreza and what you can do about them.

Is My CVT Acting Up? Understanding the Common Culprits

The most common transmission issues in the 2012 Impreza are related to the Continuously Variable Transmission (CVT). Unlike traditional automatic transmissions with fixed gears, a CVT uses a belt and pulley system to provide a seemingly infinite range of gear ratios. This allows for better fuel economy and smoother acceleration. However, the CVT in the 2012 Impreza wasn't quite as robust as it could have been, leading to several recurring problems.

The Dreaded CVT Whine: One of the most noticeable symptoms is a loud whining or buzzing noise coming from the transmission, especially during acceleration. This noise often gets louder as the car speeds up. It's usually a sign of wear and tear on the CVT's internal components, particularly the belt and pulleys.
Jerky Acceleration and Hesitation: Feeling like your car is struggling to find the right "gear" or experiencing sudden jolts during acceleration? This could be due to the CVT slipping or failing to properly adjust the gear ratio. This can be particularly noticeable when merging onto the highway or accelerating from a stop.
Shuddering and Vibrations: A shaking or vibrating sensation, especially at lower speeds, can indicate internal CVT issues. This shuddering may be intermittent or constant, and it can be quite unsettling.
Delayed Engagement: When shifting from Park to Drive or Reverse, you might notice a delay before the transmission engages. This delay can become progressively longer over time.
Transmission Slippage: This is when the engine revs up, but the car doesn't accelerate accordingly. It feels like the transmission is losing its grip.
Check Engine Light and Error Codes: A malfunctioning CVT can trigger the Check Engine Light and store diagnostic trouble codes (DTCs) related to the transmission. Common codes include those related to the valve body, torque converter, and pressure sensors.

Why is My 2012 Impreza's CVT Acting Out? Digging Deeper

Several factors contribute to the CVT problems in the 2012 Impreza:

Manufacturing Defects: Some units simply had inherent flaws in their design or assembly. These manufacturing defects can lead to premature wear and failure.
Overheating: CVTs are sensitive to heat. Driving in hot climates or towing heavy loads can cause the transmission fluid to overheat, leading to damage.
Lack of Maintenance: Regularly changing the CVT fluid is crucial for its longevity. Neglecting this maintenance task can lead to a buildup of contaminants and accelerated wear. Subaru recommends specific CVT fluid change intervals. Failing to adhere to these intervals significantly increases the risk of problems.
Driving Habits: Aggressive driving habits, such as frequent hard acceleration and braking, can put extra stress on the CVT.
Torque Converter Issues: The torque converter, which connects the engine to the transmission, can also fail. Symptoms include shuddering, stalling, and poor fuel economy.

What Can I Do About It? Troubleshooting and Solutions

Okay, so you suspect your 2012 Impreza has a transmission problem. What are your options?

Get a Professional Diagnosis: The first step is to take your car to a qualified mechanic who specializes in Subaru vehicles or has experience with CVTs. They can perform a thorough inspection, read the diagnostic trouble codes, and accurately diagnose the problem. Don't just rely on guesswork – a proper diagnosis is essential.
Check the Transmission Fluid: Examine the CVT fluid level and condition. The fluid should be a clear, light brown color. If it's dark, burnt, or has a metallic smell, it needs to be changed. Important: Use only the Subaru-specified CVT fluid. Using the wrong fluid can cause serious damage.
CVT Fluid Change: If the fluid is dirty or you're experiencing minor symptoms, a CVT fluid change might help. However, keep in mind that a fluid change is not a guaranteed fix for all CVT problems. Sometimes, it can even exacerbate existing issues if the internal damage is already significant.
Valve Body Replacement: The valve body controls the flow of hydraulic fluid within the CVT. A malfunctioning valve body can cause shifting problems and other issues. Replacing the valve body is a common repair for CVT problems in the 2012 Impreza.
Torque Converter Replacement: If the torque converter is the culprit, it will need to be replaced.
CVT Rebuild or Replacement: In severe cases, the CVT may need to be rebuilt or replaced entirely. This is the most expensive option, but it may be necessary if the internal damage is extensive.
Consider an Extended Warranty: If you're considering buying a used 2012 Impreza, look for one with an extended warranty that covers the transmission. This can provide peace of mind and protect you from costly repairs down the road.

Prevention is Key: Keeping Your CVT Healthy

While the 2012 Impreza's CVT isn't known for its longevity, there are steps you can take to prolong its life:

Regular CVT Fluid Changes: Follow Subaru's recommended maintenance schedule for CVT fluid changes. This is the single most important thing you can do to keep your CVT healthy.
Avoid Aggressive Driving: Drive smoothly and avoid hard acceleration and braking.
Don't Overload the Car: Avoid carrying heavy loads or towing trailers that exceed the car's towing capacity.
Monitor Transmission Temperature: If you live in a hot climate or frequently tow, consider installing a transmission temperature gauge to monitor the CVT's temperature.
Use Genuine Subaru Parts and Fluids: When having your CVT serviced, insist on using genuine Subaru parts and fluids.

Is it Really the Transmission? Other Possible Culprits

Sometimes, symptoms that seem like transmission problems can actually be caused by other issues:

Engine Problems: Engine misfires or other engine problems can sometimes mimic transmission issues.
Wheel Bearings: Worn wheel bearings can cause noises and vibrations that can be mistaken for transmission problems.
Tires: Unevenly worn tires or tires with low air pressure can also cause vibrations.
Axle Issues: Damaged or worn axles can also cause vibrations and noises.

The Manual Transmission Option: A More Reliable Choice?

If you're considering buying a 2012 Impreza, the manual transmission is generally considered to be more reliable than the CVT. Manual transmissions are simpler in design and less prone to failure. However, manual transmissions still require regular maintenance, such as clutch replacements.

What About a Lawsuit? The CVT Class Action Settlement

It's worth noting that Subaru settled a class-action lawsuit related to CVT problems in certain vehicles, including some Impreza models. While the 2012 Impreza wasn't directly named in the original lawsuit, it's a good idea to research the details of the settlement and see if you might be eligible for any compensation or warranty extensions.

Frequently Asked Questions

How often should I change my 2012 Impreza's CVT fluid? Subaru typically recommends changing the CVT fluid every 25,000 to 30,000 miles under severe driving conditions, or every 50,000 to 60,000 miles under normal conditions. Check your owner's manual for specific recommendations.
Can I change the CVT fluid myself? While it's possible, it's recommended to have a professional change the CVT fluid to ensure the correct procedure is followed and the correct fluid is used. Using the wrong fluid or improper filling can damage the transmission.
Is it worth fixing a CVT problem on a 2012 Impreza? This depends on the severity of the problem, the overall condition of the car, and your budget. Get a professional estimate for the repair and weigh the cost against the value of the car.
Will a CVT fluid change fix my transmission problems? A CVT fluid change can sometimes resolve minor issues, but it's not a guaranteed fix for all problems. In many cases, more extensive repairs may be necessary.
How much does it cost to replace a CVT in a 2012 Impreza? The cost to replace a CVT can range from $3,000 to $8,000, depending on whether you use a new, rebuilt, or used transmission. Labor costs will also vary depending on the mechanic.

The Bottom Line: Be Informed, Be Proactive

The 2012 Subaru Impreza's CVT transmission can be a source of frustration. By understanding the common problems, potential causes, and available solutions, you can make informed decisions about how to address any issues you may be experiencing and take steps to prevent future problems. Regular maintenance and careful driving habits are crucial for prolonging the life of your CVT.