Electrical System Issues (Battery Drain)

Frequent complaints point to parasitic battery drain, potentially due to software logic in the charging system or issues with components like the liftgate latch. Some owners report batteries dying even with minimal use or after short trips. A class-action lawsuit has addressed battery drain issues in certain Subaru models, including the 2019-2020 Ascent. Estimated repair cost: $200 - $800.

Several recalls have addressed the low-pressure fuel pump, citing a potential for the pump to become inoperative due to a defect in the impeller. This can lead to engine stalling, increasing the risk of a crash. Estimated repair cost: $500 - $800.

Owners have frequently reported spontaneous windshield cracking, impacting visibility and potentially the functionality of safety systems like EyeSight. While not a mechanical failure, it's a common owner complaint that can lead to costly replacement. Estimated repair cost: $400 - $700.

A significant recall addresses a potential fire risk associated with the Positive Temperature Coefficient (PTC) heater due to an improperly fastened ground bolt. Owners are advised to park outside and away from structures until the recall repair is completed. Estimated repair cost: Covered by Recall.

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2020 Subaru Ascent Maintenance guide

Name: Maintenance dataset for 2020 Subaru Ascent
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed12 Critical Recalls

MAINTENANCE SUMMARY

The 2020 Subaru Ascent, with 47 recalls and 372 complaints, presents a maintenance profile marked by significant issues in its electrical system and power train. Owners should be vigilant about potential battery drain and CVT transmission problems.

View Critical Issue: CVT Transmission Issues

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Reliability Score

Est. Annual Maintenance Cost

$1,200

TSBs & Recalls

84 TSBs | 47 Recalls

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Key Takeaways

Electrical System Failures: Frequent complaints about battery drain and system malfunctions require attention.
Powertrain Concerns: Issues with the CVT transmission, including slipping and rough shifting, are notable.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance