Supercharger Cooling System Leaks

The intercooler system's coolant lines and pump can develop leaks, leading to reduced cooling efficiency for the supercharger. This can impact performance and potentially lead to component damage if ignored. Estimated repair cost: $800 - $1,500.

Some 3.0T engines are known to consume oil at a higher rate than expected, potentially due to worn piston rings or PCV system issues. This requires frequent monitoring and top-offs. Estimated repair cost: $1,000 - $2,500.

Carbon Buildup on Intake Valves

Direct-injected engines like the 3.0T can accumulate carbon deposits on the intake valves, hindering airflow and performance. This is exacerbated by the lack of fuel washing over the intake valves. Estimated repair cost: $600 - $1,200.

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2015 Audi S5 Maintenance guide

Name: Maintenance dataset for 2015 Audi S5
Creator: Carfocal

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

MAINTENANCE SUMMARY

The 2015 Audi S5, with its 3.0L V6 and manual 6-speed AWD, presents an average reliability profile (6.5/10) with a notable 339 TSBs indicating potential issues requiring proactive attention. Key concerns include the supercharger cooling system and potential oil consumption; regular fluid changes and inspections are critical for longevity.

View Critical Issue: Oil Consumption

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Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

339 TSBs | 0 Recalls

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Key Takeaways

Average reliability rating with a high TSB count indicates potential for known issues.
Proactive maintenance is essential, particularly for the supercharger cooling system and oil consumption.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance