2003 Audi S4 Problems: 1 Known Issue
2003 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated October 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2003 Audi S4 has 1 documented issue, with 1 rated critical. The most serious is Xenon Headlamp Reflector Coating Can Reduce Light Output (Recall 05V096). DIY maintenance guides at au7o.io.
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All 1 Known Issue
NHTSA Recalls1 recall
EXTERIOR LIGHTING:HEADLIGHTS
ON CERTAIN PASSENGER VEHICLES, THERE IS A POSSIBILITY OF XENON HEADLAMP COATING DEGRADATION OVER TIME. THE LUMINOUS TRANSMITTANCE OF THE HEADLAMP MAY DECREASE OVER A PERIOD OF TIME.
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Frequently Asked Questions
What are the most common Audi S4 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2003 Audi S4 has 1 documented issue. The documented issue is: Xenon Headlamp Reflector Coating Can Reduce Light Output (Recall 05V096). Of these, 1 is rated critical and should be addressed promptly.
Is the Audi S4 reliable?
The 2003 Audi S4 has 1 known issue compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Xenon Headlamp Reflector Coating Can Reduce Light Output (Recall 05V096). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
What is the 2003-2004 Audi S4 Xenon Headlamp Reflector Coating Can Reduce Light Output (Recall 05V096)?
Certain 2003-2004 S4 xenon headlamp reflectors can lose coating over time, reducing luminous transmittance and the driver’s field of view. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.