Rear Axle Lock Nut Failure

Recalls indicate a potential for rear axle lock nut failure, which can lead to alignment issues and increased tire wear. This issue has seen multiple recall campaigns, suggesting a persistent concern. Estimated repair cost: $500 - $1,500.

Rear Lighting Wiring Harness Chafing

Recall 20V737000 addresses potential chafing of the rear light wiring harness. This can lead to intermittent or complete failure of rear lighting functions, impacting visibility and safety. Estimated repair cost: $200 - $500.

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2021 Audi S5 Maintenance guide

Name: Maintenance dataset for 2021 Audi S5
Creator: Carfocal

v1.0Updated Jun 2, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2021 Audi S5 presents a maintenance picture marked by a high number of recalls, particularly concerning safety-critical systems like seat belts and rear axle components. Despite a lack of reported complaints, the 228 TSBs suggest a need for proactive attention.

View Critical Issue: Seat Belt Retractor Malfunction

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Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

228 TSBs | 48 Recalls

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Key Takeaways

Proactive attention to recalls, especially those concerning the rear axle and seat belts, is essential.
The high TSB count suggests potential for issues beyond recalls; stay informed.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance