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2021 Subaru Ascent Maintenance guide

2021 Subaru Ascent Maintenance guide
v1.0Updated May 30, 2026·Daniel 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

7.8/ 10

Est. Annual Maintenance Cost

$1,200

TSBs & Recalls

60 TSBs | 1 Recalls

SummaryMaintenance & CostsCommon FailuresSymptoms & PreventionKeep ReadingFAQSources

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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.

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Critical service intervals
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MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

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Shop Parts

Quick links for routine service and common repair parts.

  • 5W-30 Synthetic Engine Oil
  • Oil Filter
  • Engine Air Filter
  • Cabin Air Filter
  • CVT Fluid

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