Hydraulic Service Brake System Failure

Recalls have addressed potential separation of a welded rotor and shaft within the hydraulic unit, directly impacting braking performance. Symptoms include a soft brake pedal or reduced braking effectiveness. Estimated repair cost: $500 - $1,500.

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2021 Volvo S90 Maintenance guide

Name: Maintenance dataset for 2021 Volvo S90
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed2 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Volvo S90, with an 'Average' reliability verdict, presents significant ownership considerations due to critical safety recalls impacting the braking system and high-voltage battery. Owners should prioritize addressing these recalls promptly.

View Critical Issue: Electrical System Malfunctions (High-Voltage Battery)

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

21 TSBs | 6 Recalls

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Key Takeaways

Prioritize completion of recalls related to the braking system and high-voltage battery.
Regularly scheduled maintenance, including oil changes and fluid flushes, is crucial.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance