The Major Subaru Ascent Problems to Know Before You Buy

The Subaru Ascent, a popular mid-size SUV introduced in 2018, quickly gained recognition for its practicality, spacious interior, and advanced all-wheel-drive system. Designed with families and adventurous individuals in mind, the Ascent promised safety, comfort, and performance. However, as with any vehicle, it has faced its fair share of challenges. In this comprehensive guide, we explore the common problems associated with the Subaru Ascent, delve into the underlying causes, and provide insights for current and prospective owners.

An Overview of the Subaru Ascent

Key Features of the Subaru Ascent

The Subaru Ascent boasts a robust suite of features that cater to diverse needs, including:

• Seating Capacity: Configurable seating for up to eight passengers.
• Drivetrain: Symmetrical All-Wheel Drive (standard), ensuring better control in challenging conditions.
• Performance: Powered by a 2.4L turbocharged engine, delivering 260 horsepower.
• Safety: Equipped with Subaru EyeSight® Driver Assist Technology for enhanced on-road safety.
• Infotainment: Features the STARLINK® multimedia system compatible with Apple CarPlay and Android Auto.

Despite these strengths, customer reviews and technical reports reveal recurring issues that potential buyers should know to make an informed decision.

Common Subaru Ascent Problems

The Subaru Ascent has been criticized for certain mechanical and technical problems. While not universal, these issues can affect the overall ownership experience if not addressed properly. Below is a detailed examination of the most prevalent concerns.

Transmission Issues

While designed to optimise efficiency and performance, the Ascent’s continuously variable transmission (CVT) has been a recurring source of owner complaints.

Owners frequently report:

• Delayed Response: There is a noticeable lag when shifting from park to drive or accelerating from a complete stop. This can lead to hesitation in critical situations, such as merging onto highways.
• Shuddering or Jerking: Drivers have experienced vibrations or irregular movements, especially during slow acceleration.
• Overheating Warnings: In some cases, the transmission overheats, prompting a warning light and potentially restricting vehicle performance.

These issues can severely impact drivability, particularly for owners who frequently tow heavy loads or navigate hilly terrain.

Why Does This Happen?

• Suboptimal calibration of the CVT system.
• Inadequate transmission cooling mechanisms, particularly during extended use.
• Software glitches affecting transmission behaviour.

How Subaru Addresses Transmission Problems
Subaru has issued technical service bulletins (TSBs) to address these issues. Updates to the transmission control module (TCM) software can help mitigate delayed responses and jerking. In extreme cases, a full transmission replacement may be required, typically covered under warranty if within the specified period.

Engine Problems

A reliable engine is the cornerstone of any vehicle, and while Subaru’s 2.4L turbocharged engine is generally efficient, it has encountered some issues that merit attention.

Commonly reported engine problems include:

• Excessive Oil Consumption: Many owners find themselves topping up oil more frequently than expected, raising concerns about engine longevity.
• Unexpected Stalling: Instances of the engine stalling, often at idle or low speeds, have been reported. This can be hazardous in traffic.
• Turbocharger Troubles: Unusual noises, power loss, or reduced fuel efficiency can signal a failing turbocharger.

What Causes These Problems?

• Defective piston rings can allow oil to seep into combustion chambers, leading to higher consumption.
• Malfunctions in the fuel delivery system, such as clogged fuel injectors.
• Wear and tear in the turbocharger system, exacerbated by aggressive driving or poor maintenance.

What Can Be Done?

• Regularly monitor oil levels and perform timely oil changes using manufacturer-recommended grades.
• Address stalling issues immediately by consulting a technician to check fuel or ignition systems.
• For turbocharger concerns, early diagnosis and potential replacement may prevent extensive damage.

Electrical System Malfunctions

Modern vehicles depend heavily on electronic systems, but this can become a double-edged sword when glitches occur. The Subaru Ascent is no exception, with several owners facing electrical issues that disrupt their driving experience.

Key Issues Reported:

• Infotainment System Glitches: Owners frequently cite the STARLINK® system freezing or rebooting unexpectedly, causing frustration during drives.
• Battery Drainage: Some Ascents have been plagued by premature battery failure or mysterious power drains when the car is off.
• Sensor Failures: Problems with driver-assistance systems, such as blind-spot detection and lane-keeping assist, can reduce confidence in the vehicle’s safety features.

Underlying Causes

• Software bugs in the STARLINK® system.
• High parasitic draw from components like alarm systems or improperly wired accessories.
• Faulty sensors or outdated firmware affecting advanced safety features.

Solutions Provided by Subaru
Subaru has rolled out software updates for the STARLINK® system to resolve most infotainment issues. Owners are also advised to inspect their vehicle’s battery and wiring regularly to avoid unexpected failures.

Climate Control System Problems

The climate control system is integral to maintaining comfort, particularly in extreme weather conditions. However, Subaru Ascent owners have reported inconsistencies in this area.

Frequent Complaints:

• Ineffective Heating/Cooling: Maintaining desired cabin temperatures can be inconvenient on long trips.
• Noisy Operations: Fans emit loud or unusual noises, mainly when set to high speeds.
• Poor Defrosting Performance: Inefficiency in clearing fogged or icy windshields, especially in colder regions.

Why Do These Issues Arise?

• Clogged cabin air filters can restrict airflow and reduce overall efficiency.
• Faulty actuators or HVAC sensors may disrupt temperature regulation.
• Software calibration problems in the climate control module.

How Can Owners Address This?

• Replace cabin air filters as part of routine maintenance.
• Seek professional diagnosis for any unusual noises or ineffective operation.
• Keep the HVAC system software up to date with the latest revisions from Subaru.

Suspension and Steering Challenges

A smooth and controlled ride is expected from a family-oriented SUV like the Ascent. However, some drivers have noticed issues that detract from its overall comfort and handling.

Reported Issues Include:

• Noises from the Suspension: Clunking or creaking sounds when driving over uneven surfaces.
• Steering Wheel Vibration: Vibrations at high speeds are often linked to alignment or tyre issues.
• Rapid Tyre Wear: Uneven tread wear can indicate underlying suspension or alignment problems.

Possible Causes:

• Worn suspension components, such as bushings or struts.
• Misalignment or unbalanced tyres.
• Poor-quality components that degrade prematurely.

Recommended Actions:

• Perform regular wheel alignments and tyre rotations.
• Replace worn suspension parts promptly to avoid further complications.
• Inspect tyres frequently for signs of uneven wear.

Paint and Rust Problems

Although not a mechanical issue, paint durability and rust resistance are essential for maintaining the vehicle’s aesthetic and structural integrity.

Concerns Include:

• Chipping Paint: Thin or fragile paint layers, particularly on the front end, are prone to chipping.
• Rust Development: Premature rusting, especially in regions with harsh winters and road salt exposure.

Contributing Factors:

• The use of environmentally friendly paints that are less durable than older formulations.
• Insufficient rustproofing during manufacturing.

Solutions:

• Regularly apply protective wax or coatings to vulnerable areas.
• Consider aftermarket rustproofing treatments for additional protection.

Tips for Preventing Common Subaru Ascent Problems

Adopting a proactive approach to vehicle maintenance is essential to avoid encountering significant issues.

• Follow the Service Schedule: Adhering to Subaru’s recommended maintenance intervals can help catch potential problems early.
• Stay Informed About Recalls and Updates: Subaru frequently issues recalls or service bulletins for known problems. Regularly check for updates related to your vehicle.
• Drive Responsibly: Avoid aggressive driving, as it can place undue stress on components such as the transmission and turbocharger.
• Use High-Quality Parts and Fluids: Ensure that replacements and fluids meet manufacturer specifications for optimal performance.

Conclusion

The Subaru Ascent is a versatile and capable SUV that ticks many boxes for families and adventurers. However, its track record has blemishes, from transmission and engine troubles to paint durability concerns. Owners can mitigate many of these challenges by staying vigilant and proactive and enjoying a smoother ownership experience.

Subaru’s efforts to address these problems through recalls, service bulletins, and warranty coverage are commendable, but potential buyers should weigh these factors before deciding. As with any vehicle, thorough research and regular maintenance are key to ensuring long-term satisfaction.

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