Is the 2021 Subaru Outback a reliable car?

The 2021 Subaru Outback is generally considered a reliable choice in its segment, with Subaru’s reputation for longevity and standard all-wheel drive contributing to its appeal.

In this article, we assess how the 2021 Outback fares in terms of reliability, what owners and reviewers tend to report, and how prospective buyers or owners can verify and maintain reliability. The discussion covers overall reliability signals, common issues to watch for, and practical tips for buying or maintaining a used model.

Reliability profile for the 2021 Outback

Several independent evaluators and owner surveys place the 2021 Outback in the above-average range for reliability within its class. Key strengths cited by reviewers include its durable drivetrain, strong resale value, and the longevity typically associated with Subaru’s boxer engines and all-wheel-drive system. While not free from issues, the model generally benefits from a well-rounded package that emphasizes safety, practicality, and consistency in daily use.

• Standard all-wheel drive across all trims, which adds capability and can contribute to long-term reliability in varied conditions.


• Solid safety features, including Subaru’s EyeSight driver-assistance technology, which tend to improve confidence in regular use.


• Practical interior space and cargo versatility, often cited as durable for family life and outdoor activities.


• Predictable, comfortable ride quality with a reputation for stable performance over time.


• Strong resale potential, reflecting steady demand and brand trust in Subaru models.

These advantages help position the 2021 Outback as a dependable choice, though buyers should be mindful of model-year-specific caveats and routine maintenance needs that can affect long-term reliability.

Common issues to watch for and recall status

As with many modern vehicles, some owners report issues that can influence perceived reliability. It is prudent to verify that all open recalls have been addressed and to understand the most commonly reported concerns in consumer feedback and repair data.

• Infotainment system glitches or lag on some units, which can affect daily usability but are typically addressable through software updates or resets.


• CVT-related behavior concerns in certain driving situations, such as transmission responsiveness or smoothness during acceleration, which manufacturers commonly address through updates and servicing guidance.


• Maintenance-sensitive components like brakes, tires, and suspension wear, which are typical for any vehicle with regular all-weather use.


• Oil consumption or gasket-related issues are occasionally noted in owner reports for some Subaru engines across various model years; the risk profile for the 2021 Outback tends to be lower but is not zero.

Note: Always check the official recall status for a specific vehicle through NHTSA or Subaru’s recall portal, and review the vehicle’s service history to confirm that any open campaigns have been completed.

What to do when buying a used 2021 Outback

If you’re considering a used Outback, a structured checklist can help gauge reliability and future maintenance needs. The steps below are designed to identify potential reliability risks before purchase.

1. Review the vehicle’s full maintenance and service history, focusing on oil changes, fluid services, and any CVT-related maintenance if applicable.


2. Check for open recalls and confirm that all recall work has been completed by a certified dealer.


3. Request a pre-purchase inspection by an independent, qualified mechanic who has experience with Subaru systems, especially the CVT and drivetrain.


4. Test-drive the vehicle to assess transmission response, throttle tip-in, and overall drivability in various speeds and conditions.


5. Inspect infotainment and EyeSight systems to ensure software updates are current and functioning properly.

Thorough due diligence can help you avoid unexpected repairs and support a reliable ownership experience.

Maintenance and features that support reliability

Keeping a 2021 Outback in good mechanical condition hinges on disciplined maintenance and timely service. The following practices are commonly recommended to maximize reliability and longevity.

• Adhere to Subaru’s recommended maintenance schedule for oil changes, fluids, and filter replacements, and use quality parts during service.


• Follow guidance for CVT maintenance if advised in service bulletins or by your dealer, including fluid checks or replacements as recommended.


• Keep the EyeSight driver-assistance software up to date with the latest available updates from Subaru.


• Monitor brakes, tires, and suspension components, addressing wear promptly to avoid secondary issues.


• Address recalls promptly and maintain thorough service records for resale value and reliability tracking.

Adhering to these practices helps sustain reliability over the life of the vehicle and supports its long-term value.

Summary

The 2021 Subaru Outback tends to be a reliable option within its class, offering strong all-wheel-drive capability, a solid safety portfolio, and a practical, durable design. While no vehicle is immune to occasional issues—particularly around infotainment and CVT behavior—sticking to regular maintenance, staying current with recalls, and conducting due diligence when buying used can help preserve reliability and owner satisfaction. For many buyers seeking a versatile, capable wagon/SUV with a track record of longevity, the 2021 Outback remains a compelling choice.

Is the 2021 Subaru Outback reliable?

As a whole, consumers found the vehicle's comfort and reliability to be its strongest features and performance to be its weakest. 65 out of 128 of owners (51% of them) rank the 2021 Outback five out of five stars. Overall, consumers seem aligned in their opinions of the 2021 Subaru Outback.

What year of Subaru Outback is most reliable?

The most reliable Subaru Outback years include the 2022-2025 models, with earlier models like 2017-2019 and 2005-2009 also recommended. Other highly-rated years are 2016-2017, 2009, 2012, 2014, and 2021-2022, which generally have fewer reported issues and are considered reliable choices for a used vehicle. 
Recommended years

• 2022-2025: The most current models are praised for their safety features and technology. The 2023 model was an IIHS Top Safety Pick+. The Outback Wilderness, released in 2022, is specifically designed for off-roading. 
• 2017-2019: The 2019 model, being the last year of its generation, had most of the mechanical issues resolved and offers a good balance of safety, technology, and efficiency. 
• 2005-2009: These models are considered reliable, with 2009 being a particularly strong year with fewer complaints. The 2005 model is a good option for budget-conscious buyers, and the 2005-2009 generation is the last to offer a manual transmission and a sedan body style. 

You can watch this video to learn about the best and worst Subaru Outback models: 1mcar PROblemsYouTube · Sep 28, 2025
Other reliable options

• 2021-2022: These years offer a great combination of performance, technology, and safety features. 
• 2016-2017: The 2017 model is highly rated for its reliability, safety, and practicality. The 2016 model, being the last of the fourth generation, is also considered a strong choice. 
• 2014: This model offers a good balance of features, performance, and reliability. 
• 2012: This year is often recommended for its durable 3.6L H6 engine and five-speed automatic transmission, a combination many buyers prefer over the CVT used in later models. 

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What to consider

• Model Generation: For each generation, the last few model years are often the most reliable because most of the initial design and mechanical issues have been addressed. 
• Engine and Transmission: The 3.6L H6 engine paired with the five-speed automatic transmission found in some 4th generation models (2010-2014) is a durable and reliable combination. 
• Safety: Every Outback from 2010 onwards has been named a Top Safety Pick or Top Safety Pick+ by the IIHS, making them a consistently safe option. 

How many miles will a 2021 Subaru Outback last?

A 2021 Subaru Outback can last between 200,000 and 300,000 miles with proper maintenance. Key factors in its longevity include following a regular maintenance schedule, addressing issues like battery drain or potential valve problems promptly, and protecting it from harsh driving conditions and environmental elements like rust and snow. 
Expected lifespan

• 200,000 to 300,000 miles: With consistent, proper care, the Outback is expected to reach this mileage range.
• 16 to 20 years: At an average of 12,000 miles per year, this lifespan could translate to 16 to 20 years of use. 

Key factors for longevity

• Regular maintenance: Consistently performing routine service like oil changes, tire rotations, and fluid flushes is crucial. 
• Driving habits: Avoiding harsh driving, such as frequent hard braking or driving aggressively, will help extend the car's life. 
• Environmental protection: Parking in a garage, using a protective clear coat, and rustproofing, especially in snowy climates, can prevent premature wear. 
• Addressing issues: Some owners have reported issues with the battery draining or problems with the thermal control valve, which can be addressed through maintenance or warranty coverage if applicable. 

Reliability and value

• High reliability rating: The Subaru Outback has a strong reputation for reliability, with 2021 being noted as one of the more reliable years. 
• Strong resale value: The Outback's durability contributes to its strong performance as a long-term investment with good resale value. 

What is a common problem with a Subaru Outback?

Common problems for the Subaru Outback include weak windshields, excessive oil consumption, and issues with the cooling system and CVT transmission, especially in specific model years. Other frequent complaints involve airbag defects, electrical problems like battery drain, and vibration during acceleration.
 
You can watch this video to learn about the history of Subaru head gasket issues: 1mMrSubaru1387YouTube · Aug 11, 2024
Engine and powertrain 

• Excessive oil consumption: Many models, particularly older 2.5L engines, may burn oil between oil changes due to leaks from seals. 
• Cooling system failures: Overheating can lead to blown head gaskets, and the cooling system itself is a common point of failure. 
• CVT transmission problems: Some model years are more susceptible to issues like rough shifting or failure. 
• Vibration during acceleration: Some owners report a shudder or vibration when accelerating. 
• Older head gasket issues: The EJ-series engines (roughly 1997–2012) had an inherent head gasket failure problem, though this was mostly resolved in later models. 

Body and electrical

• Weak windshields: The glass is prone to cracking from stress or minor impacts. 
• Airbag defects: Some models have a history of airbag problems, leading to recalls. 
• Electrical issues: Problems can include unexpected battery drain and issues with the ABS control module. 

Other common issues

• Oxygen sensor failure: The front O2 sensor can fail, sometimes leading to a recall. 
• Premature brake wear: Some models experience faster-than-average brake wear. 
• Suspension wear and tear: Like many vehicles, suspension components will eventually wear out.