Rear Seat Belt Retractor Issues

Widespread issues with rear seat belt retractors, particularly concerning child restraint system security. This is addressed via recall (21V606000). Estimated repair cost: $200 - $600.

Rear Axle Lock Nut Failure

Failure of rear axle lock nuts due to stress corrosion, potentially leading to alignment issues and tire wear. Addressed by recalls (21V295000, 22V034000). Estimated repair cost: $500 - $1,500.

Electrical System Software Glitches

Software issues affecting the instrument cluster and other electronic modules. These are often resolved with software updates. Estimated repair cost: $150 - $500.

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2021 Audi RS Q8 Maintenance guide

Name: Maintenance dataset for 2021 Audi RS Q8
Creator: Carfocal

v1.0Updated Jun 2, 2026Ethan Miller4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Audi RS Q8 presents a below-average reliability verdict, underscored by a significant number of recalls, particularly concerning the engine and seat belts. Owners must prioritize verifying completion of the critical engine recall for cylinder bore cracks and the extensive rear seat belt retractor campaign.

View Critical Issue: Engine Cylinder Bore Cracks

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

261 TSBs | 52 Recalls

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Key Takeaways

Prioritize completion of critical engine and seat belt recalls.
Regularly inspect rear axle components for signs of wear or stress.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance