How often should I change the transmission fluid on my Subaru Impreza?

In most Subaru Impreza models, the recommended service intervals depend on whether your car has a CVT (continuously variable transmission) or a traditional manual gearbox. For CVTs, plan fluid changes around 60,000 miles under normal driving, with more frequent changes (about every 30,000 miles) if you operate under severe conditions. For manual transmissions, a typical baseline is around 60,000 miles, with 30,000 miles for heavy use. Always verify exact intervals in your owner's manual or with a Subaru service professional for your specific year and model.

Transmission types in the Subaru Impreza

The Impreza has two main drivetrain configurations across model years: a Lineartronic CVT in most trims, and traditional manual gearboxes in some trims and older models. Each configuration has its own fluid requirements and service cadence.

CVT-equipped Impreza

For models built with Subaru's Lineartronic CVT, the fluid service interval is typically 60,000 miles under normal driving. More frequent changes are advised for severe service, such as heavy towing, extreme heat, or a high amount of stop-and-go city driving. The CVT uses a dedicated CVT fluid (CVTF) that must meet the specification for your year and model.

Below are the typical maintenance intervals for CVT-equipped Impreza models, followed by notes on what to expect and how to approach service.

• Normal driving: CVT fluid replacement every 60,000 miles (96,000 km).


• Severe service: every 30,000 miles (48,000 km) or as recommended by a Subaru service technician, especially if you tow, drive in extreme heat, or make many short trips.


• Important considerations: Use Subaru-approved CVTF with the correct specification for your model year; many CVT services require a drain-and-fill rather than a simple dipstick check and must be performed by a trained technician.

In short, CVT intervals center on 60,000 miles for normal use and 30,000 miles for severe service, with the proper fluid type and service procedure essential for longevity.

Manual transmission Impreza

For Impreza models with a traditional manual transmission, the interval is typically separate from CVTs and depends on the year and transmission design. In many years, Subaru has recommended gear oil changes around 60,000 miles for normal driving, with more frequent service (about 30,000 miles) under severe use or heavy loads.

Below are the typical manual-transmission intervals and guidance for service. This applies to manuals or models with a traditional transaxle rather than CVT.

• Normal driving: manual transmission gear oil change every 60,000 miles (96,000 km).


• Severe service: every 30,000 miles (48,000 km) or as advised by a technician, particularly with towing, dusty or hot environments, or frequent stop-and-go driving.


• Notes: Use the recommended GL-4 gear oil (or the viscosity specified in the owner's manual) and follow the fill procedure for your model year.

In summary, manual transmissions generally follow a 60k-mile baseline, with 30k miles under strenuous conditions, and exact specifications vary by model year and region. Always refer to the owner's manual or dealer guidance for your exact Impreza version.

Beyond the intervals: factors that can change the schedule

Even with a standard interval, certain driving conditions can justify earlier service or more frequent checks. Factors that influence transmission fluid life include climate (extreme heat or cold), towing or heavy loads, frequent short trips that don’t allow fluids to reach operating temperature, dusty or dirty environments, and aggressive driving. For CVTs, fluid quality matters more because once the fluid degrades, wear can increase rapidly and shifting may feel less smooth.

Common indicators that you should service the transmission sooner include: slipping, hard or erratic shifting, grinding noises, overheating, or a burnt smell from under the hood. If you notice any of these symptoms, arrange a diagnostic check with a qualified Subaru technician.

• Symptom-driven checks: slipping, shuddering, rough shifting, or unusual noises can indicate fluid degradation.


• Maintenance context: mileage-based intervals may be adjusted downward if you live in harsh conditions or tow regularly.


• Fluid appearance: CVT fluid is typically bright red; if it darkens, appears cloudy, or smells burnt, service is likely needed.

Ultimately, perception of performance and dealership recommendations should guide timing as much as clock mileage.

What to expect during a transmission service

The exact steps depend on the transmission type and the service approach of the shop. CVT service often involves a drain-and-fill procedure with CVTF and may include a filter or screen service in some models, while manual transmissions typically use a drain-and-fill of the gear oil. Some shops offer transmission flushes, but these are not universally recommended by Subaru, and you should follow your owner's manual and dealer guidance.

Before scheduling, confirm the service method, required fluid specification, and any diagnostic checks that accompany the fluid replacement. For CVTs, using the proper CVTF and ensuring the service is performed to Subaru specification is essential for longevity and smooth operation.

Summary

For the Subaru Impreza, fluid-change intervals depend on transmission type and usage. CVT models commonly require CVT fluid replacement around 60,000 miles under normal driving and around 30,000 miles under severe conditions; manual transmissions typically use a 60,000-mile baseline with 30,000 miles for heavy use. Always consult your owner's manual and a qualified Subaru technician for your exact year and configuration, and address any symptoms promptly to protect the transmission's longevity.

Is it okay to do a full transmission flush at 70k miles?

There is no such thing as too often, but every 50-75k miles should be adequate for most any transmission. Don't need a flush, just drain out as much as possibe, replace the filter, and refill equal to what was drained.

How often do you change the transmission fluid on a Subaru Impreza?

every 30,000 to 60,000 miles
Follow Subaru's Recommendations
Subaru often suggests changing the transmission fluid at regular intervals, such as every 30,000 to 60,000 miles, depending on the model and transmission type. Adhering to these guidelines is crucial to keep your warranty valid and ensure the longevity of your transmission.

How often should CVT transmission fluid be changed?

CVT transmission fluid should be changed every 30,000 to 60,000 miles, but this interval can be shorter depending on driving conditions. Factors like heavy city traffic, towing, extreme temperatures, and frequent short trips require more frequent changes, possibly as often as every 30,000 miles. It is always best to check your vehicle's owner's manual for the manufacturer's specific recommendation. 
Factors that shorten the fluid change interval

• Driving conditions: Frequent stop-and-go city driving, towing, or driving in mountainous or hilly areas. 
• Environment: Driving in extremely hot or cold climates. 
• Trip type: Frequent short trips. 
• Vehicle age: Some manufacturers have backtracked on long-life fluid recommendations, and it is prudent to follow more conservative intervals, especially for older vehicles. 

How to check fluid condition

• Visual inspection: The fluid should be red when new, but if it appears brown or black, it's time for a change. 
• Professional check: Some vehicles do not have a dipstick, so a qualified mechanic should inspect the fluid condition. 

What to do

1. Consult your owner's manual: This provides the most accurate recommendation for your specific vehicle. 
2. Consider severe driving conditions: If you frequently drive in the conditions listed above, plan to change the fluid more often, likely around the 30,000-mile mark. 
3. Schedule service: If your car is not a DIY project, schedule a fluid change with a trusted mechanic. 
4. Be aware of \"sealed for life\" claims: The term \"life\" can sometimes mean the expected life before a failure, which may be after the warranty expires. It is still recommended to change the fluid to ensure longevity. 

How much does it cost to change Subaru transmission fluid?

The cost for a Subaru transmission fluid change typically ranges from $250 to $500 or more, depending on the service center and whether it's a drain and fill or a more extensive exchange. Independent mechanics are often cheaper, with some people reporting costs around $300 or less, while dealerships can be more expensive, ranging from approximately $400 to over $500. 
Factors that influence the cost

• Service Center: Dealerships generally have higher labor rates than independent mechanics, but they use manufacturer-recommended parts. 
• Type of Service:
  • A basic drain and fill will be the least expensive option. 
  • A full fluid exchange, which may involve multiple drain and fills, can be more expensive. 
• Fluid Cost: Subaru's specific transmission fluid can be expensive, which contributes to the total cost. 
• Labor: The process for a Subaru CVT (Continuously Variable Transmission) can be more complex than a traditional automatic, requiring special tools to monitor fluid temperature during the refill. 

Tips for saving money

• Shop around: Get quotes from multiple dealerships and independent mechanics to compare prices. 
• Ask about specials: Some independent shops may offer discounts on transmission service. 
• Consider a drain and fill: A basic drain and fill is a common and effective service for many modern Subarus, especially those with a CVT, and is often less expensive than a full exchange. 
• Check for a dipstick: Some older models may have a dipstick for fluid checks, but most modern Subarus do not, so you will likely need to have it serviced by a professional.