2008 Audi S5

2008 Audi S5

Overview

The 2008 Audi S5, a stylish and performance-oriented coupe, generally offers a solid ownership experience, particularly for those who appreciate its V8 engine’s power and distinctive design. However, like many performance vehicles of its era, it is not without its potential mechanical and electrical quirks. Owners should be aware of specific areas that may require attention over time, especially concerning the powertrain and certain electronic systems. Regular maintenance is crucial for longevity, but some components have shown a propensity for issues that go beyond standard wear and tear. This analysis focuses on documented common problems and their potential resolutions to provide a clearer picture of the S5’s reliability.

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Engine

4.2L V8 (Naturally Aspirated)

Timing Chain Tensioner Failure

• Symptoms: Rattling noise from the engine, especially on startup; check engine light; potential for catastrophic engine damage if ignored.
• Solution: Replacement of timing chain tensioners, guides, and potentially the chains themselves. This is a labor-intensive repair.
• Cost: $2500 - $4500

Oil Consumption

• Symptoms: Excessive oil usage between changes, blue smoke from exhaust on startup.
• Solution: Can be due to worn piston rings or valve stem seals. Repair involves engine disassembly.
• Cost: $2000 - $5000+

Transmission

6-Speed Manual

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

6-Speed Tiptronic Automatic

Torque Converter Issues

• Symptoms: Shuddering or slipping during acceleration, delayed engagement, rough shifting.
• Solution: Rebuilding or replacement of the torque converter.
• Cost: $1500 - $3000

Suspension

Standard Chassis

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

Electrical

General Electrical System

Infotainment System Glitches

• Symptoms: Screen freezing, unresponsive buttons, navigation system errors.
• Solution: Software updates or replacement of the MMI control unit.
• Cost: $500 - $1500

Sensor Failures

• Symptoms: Various warning lights on the dashboard (ABS, ESP, etc.), engine performance issues.
• Solution: Diagnosis and replacement of faulty sensors (e.g., ABS wheel speed sensors, MAF sensor).
• Cost: $200 - $600

Exterior

Body and Trim

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

Interior

Cabin Components

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

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Summary Verdict

The 2008 Audi S5 is a desirable performance coupe with a potent V8 engine. While its core mechanicals are generally robust, potential buyers and current owners should be aware of specific issues that can arise. The most significant concern is the engine’s timing chain tensioner system, which can be a costly repair if it fails. Oil consumption can also be a factor. Automatic transmission owners may encounter torque converter problems. Electrically, infotainment system glitches and sensor failures are the most commonly reported issues. Despite these potential drawbacks, with diligent maintenance and addressing these known issues proactively, the 2008 S5 can remain a rewarding vehicle to own.