Electrical System: Battery Drain

Frequent complaints of battery drain even at low mileage, leading to starting issues. This can indicate a parasitic draw or charging system fault. Estimated repair cost: $150 - $500.

Visibility/Wiper: Windshield Cracking

A notable number of owners report spontaneous windshield cracks without apparent impact, often occurring early in the vehicle's life. Estimated repair cost: $400 - $800.

Lane Departure: Assist System Malfunction

Reports of the Lane Departure Assist system exhibiting overly aggressive or unpredictable steering corrections, potentially leading to unintended lane departures. Estimated repair cost: $300 - $700.

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2021 Subaru Ascent Maintenance guide

Name: Maintenance dataset for 2021 Subaru Ascent
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2021 Subaru Ascent requires diligent maintenance, particularly concerning its electrical system and CVT transmission, which are prone to early-life issues like battery drain and shuddering. Owners should prioritize regular inspections and fluid services for these components to mitigate potential failures.

View Critical Issue: Powertrain: CVT Transmission Issues

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Reliability Score

Est. Annual Maintenance Cost

$1,200

TSBs & Recalls

60 TSBs | 1 Recalls

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Key Takeaways

The 2021 Subaru Ascent carries a 'Below Average' reliability rating, with recurring problems in its electrical system and powertrain.
Owners frequently report issues such as battery drain, CVT transmission shuddering or slipping, and spontaneous windshield cracking.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance