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Electrical systemPart report

2004 Audi S4 Electrical system Problems

Complaints
2about this part
Share
7%of 29 total for the year
Median mileage
79,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 2 complaints about the electrical system of the 2004 Audi S4, 7% of the 29 complaints for this model year. Where a mileage was given, the median is 79,000 miles. 1 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Xenon headlamps wiring all corroded and bare with no insulation left. Check with Audi and they said our vehicle and VIN is not part of any recall. Yet rcorrd-05v096-4498 in your database shows a mofification letter from vw to include our VIN. There is no record according to Audi service shops that show any recall work done to our headlights. I have attached a picture that shows the deteriation of the electrical wiring and headlamps to our 2004 Audi S4. Would appreciate some assistance to having our headlamps replaced for safety reasons.”

NHTSA complaint #10865507, filed 2016-05

“The contact owns a 2004 Audi S4. While driving at night, the low beam head lamps failed to illuminate without warning. While attempting to the head lamp bulbs, the contact noticed that the wiring was burned and damaged. The dealer and the manufacturer were notified of the failure, but the VIN was not included in any recalls. The approximate failure mileage was 79,000.”

NHTSA complaint #10747523, filed 2015-08, 79,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20201588%
201416%
201326%
2012314%
201128%
2010610%
2007215%
2006413%
2005512%
200427%
20021045%
20014754%
20004934%

Other parts of the 2004 Audi S4

Engine cooling
12 complaintsTransmission and drivetrain
5 complaintsEngine
3 complaintsExterior lighting
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsSteering
2 complaintsAir bags
1 complaintsBrakes
1 complaintsOther or unknown
1 complaintsSeat belts
1 complaintsBody and structure
1 complaintsTires
1 complaints

← All problems reported for the 2004 Audi S4

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology