2002 Audi S4 Reliability ReportKeepScore 45/100 · top failure points · buy or avoid
Quick Facts · 2002 Audi S4
- Scores 17 points below the strongest nearby year — the 2004 Audi S4 earns a 62.
- The system most likely to surface first: turbocharger system (critical severity).
- Has 1 NHTSA recall on record — the most notable involves the air bags:frontal:driver side:inflator module.
2002 Audi S4: Buy or Avoid?
The 2002 Audi S4 is a high-performance, enthusiast-focused vehicle that carries significant risk due to its complex twin-turbocharged engine. While offering exhilarating performance and quattro AWD, owners must be prepared for substantial maintenance and repair costs, particularly around the critical turbocharger systems. This is not a vehicle for the faint of heart or those on a strict budget; expect to invest heavily in its upkeep.
The 2002 Audi S4 is a high-risk proposition for the average used car buyer. While it's a phenomenal performance car for enthusiasts, its inherent design flaws, particularly with the K03 turbochargers, guarantee substantial financial outlay. Unless you have deep pockets, a trusted Audi specialist, or significant DIY…
Best Model Years
N/A (The 2.7T B5 S4 platform shares the same fundamental risks across its production run. Later model years might have minor revisions but no significant reliability improvements on core issues.)
Years to Avoid
N/A (All B5 S4 2.7T models from 2000-2002 carry similar risks. There isn't a 'bad' year within this specific generation, just a universally high-risk platform.)
Biggest Strengths
- Potent 2.7T V6 engine (when healthy)
- Excellent quattro all-wheel-drive system
- Robust 01E manual transmission (if equipped)
2002 Audi S4 — Known Trouble Spots
The systems that tend to fail first on the 2002 Audi S4, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
The K03 twin-turbochargers are notoriously prone to failure, often due to oiling issues, exhaust heat, or simply age/mileage. Replacement typically requires 'engine out' service, making it exceedingly expensive.
The multi-link front suspension system features numerous control arms and bushings that wear out, leading to clunking noises, poor alignment, and compromised handling. Replacing all components is a labor-intensive and parts-expensive job.
The ABS control module is known to fail, resulting in dashboard warning lights and loss of ABS/traction control. Instrument cluster LCD displays also commonly fail, leading to unreadable information due to pixel loss.
2002 Audi S4 Mileage Danger Zones
The mileage windows when the 2002 Audi S4 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the S4 should still be relatively fresh. Focus on verifying basic maintenance has been performed, like oil changes and tire rotations. Any issues found here are likely manufacturing defects or early wear due to aggressiv…
Maintenance Zone
This mileage range is critical for the S4. The costly and essential timing belt service is due or overdue. Neglecting this maintenance is a recipe for catastrophic engine failure. Also, be aware of early signs of suspension wear.
Elevated Risk Zone
Now we're entering the primary danger zone for the K03 turbos. Start budgeting for their potential replacement. Electrical issues like the ABS module and instrument cluster pixel fade become more prevalent. Suspension components will lik…
High Risk Zone
At this mileage, an S4 has likely already had, or desperately needs, significant work. If turbos haven't been replaced, they're on borrowed time. Expect continuous maintenance and repair needs for various systems, making it suitable prim…
2002 Audi S4 Ownership Cost Outlook
What it typically costs to keep the 2002 Audi S4 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$1,000-2,000
Moderate Repairs
$1,000-3,000 occasionally (non-turbo related)
How Long Does the 2002 Audi S4 Last?
A low-mileage 2002 S4 doesn't necessarily mean low risk; critical maintenance items like timing belts and turbos are age-sensitive too. Higher mileage examples that have already had turbos replaced by a reputable shop might be less risky, assuming records exist.
What 2002 Audi S4 Owners Actually Say
What Owners Love
- Exceptional acceleration and power delivery, especially with modifications.
- Superb quattro all-wheel-drive traction in all weather conditions.
- Luxurious and well-appointed interior for its age.
- Understated 'sleeper' appearance that doesn't scream performance.
Common Frustrations
- Extremely high repair and maintenance costs, particularly for engine-out turbo service.
- Frequent small electrical gremlins and sensor failures.
- Parts can be expensive and sometimes require specialist sourcing.
- Fuel economy is poor for a car of its size and age.
Who Should Buy the 2002 Audi S4?
Best For
- Dedicated automotive enthusiasts with significant mechanical aptitude or a large budget for specialist labor.
- Individuals seeking a high-performance sleeper sedan with all-wheel-drive.
- DIY mechanics who enjoy working on complex German vehicles.
Not Ideal For
- Budget-conscious buyers seeking reliable, low-cost transportation.
- Anyone who relies on a single vehicle for daily commuting without backup.
How the 2002 Audi S4 Compares to Rivals
The B5 S4 offers a unique blend of understated performance and luxury that few competitors matched at its price point. However, its complex engineering translates to significantly higher ownership costs compared to most Japanese and even some other German rivals.
More Reliable Than
- BMW M3 (E46 - potentially higher running costs for certain issues)
- Subaru WRX STI (less refined interior)
- Mitsubishi Lancer Evolution (harsher ride, less luxury)
Comparable To
- Mercedes-Benz C32 AMG (similar performance/luxury balance, different set of common issues)
Safety Recalls on the 2002 Audi S4
1 recall on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2000-2001 Audi TT Coupe, TT Roadster, 2000-2002 A4, and S4 vehicles equipped with Non-Azide Driver Air Bag Inflators (NADI) that do not contain phase stabilized ammonium nitrate (PSAN) propellant. Due to a manufacturing issue, the NADI inflators may absorb moisture, possibly causing the air bag to deploy improperly in the event of a crash.
What breaks on the 2002 Audi S4?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Audi S4 — Year-by-Year Comparison
Compare KeepScores across nearby years of the Audi S4. Click any year for its full report.
Competing 2002s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2002 Audi S4
Parts and accessories matched to your 2002 Audi S4
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Frequently Asked Questions
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