2000 Audi S4: what breaks, and at what mileage

The failures owners actually file about

Owners have reported 26 named failure modes on the 2000 Audi S4, and the three most-reported carry 66% of everything filed, so the trouble here is concentrated rather than scattered.

Instrument cluster or gauge failure leads with 42 reports, about 5.4 per 1,000 vehicles and with the middle half of reports between 47k to 92,500 miles.

Other wheel or tire problem follows with 37 reports, median 80,000 miles.

ABS module or sensor failure follows with 34 reports, usually reported between 56k to 72,500 miles.

By system, the reports fall mostly into brakes (43), infotainment (42) and wheels (40).

How bad it is when it goes

Across the named modes, 7 mention a crash and 3 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.

The average severity weight across every report on this year is 4.09, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.

What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: instrument cluster or gauge failure at $350–$1,400, other wheel or tire problem at $200–$1,500, ABS module or sensor failure at $500–$2,400 and control module (ECM/PCM/BCM) failure at $700–$3,000. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.

6% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.

How often, against how many were built

Scaled by an estimate of how many of these cars exist, the 2000 Audi S4 draws about 22 per 1,000 vehicles, which puts it in the 92nd percentile of complaint rates among 2000 vehicles we can rate.

That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.

The working figure is 7,851 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2000 vehicles, which is what the risk score uses, is far more robust than the rate itself.

Recalls on the 2000 model year

NHTSA has issued 1 recall campaign covering the 2000 Audi S4, affecting an estimated 7,851 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.

The campaigns cover air bags:frontal:driver side:inflator module. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.

Recalls also distort complaint counts. Publicity about a campaign reminds owners that complaining is possible, so reports for a recalled component often spike after the recall rather than before it.

Better and worse years of the same car

High risk for a 2000 — 243rd riskiest of the 327 2000 vehicles we can rate. Because the ranking is against the same model year only, age cancels out of it.

Across the 13 model years of this car that carry enough reports to score, 2005 comes out best at 60 and 2011 worst at 75, with 2000 itself at 63.

No other year of this model scores meaningfully better than 2000, so if this generation is what you want, the year is not the lever.

Within the 2000–2002 generation specifically, 2002 is the strongest year at 63 and 2000 the weakest at 63.

What to look at before buying one

The mileages below are where the first quarter of reports for each mode had already been filed, which makes them the point at which a fault is worth looking for rather than the point at which it happens: instrument cluster or gauge failure from about 47k and ABS module or sensor failure from about 56k.

On a 2000 Audi S4 with more miles than that on it, the useful question to put to a seller or a mechanic is whether instrument cluster or gauge failure has been dealt with, and if so with what parts and at whose expense. A car that has already had the repair is in a different position from one that has not.

None of this is a diagnosis. It is a list of what other owners of the same model year reported, ordered by when they reported it, which is a good place to point an inspection and a poor place to stop.

The limits of complaint data

171 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.

Of those 171 reports, 78 carried an odometer reading, so the mileages here describe 46% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".

Named failure modes come from matching phrases in the complaint text, so a badly worded complaint can land in the wrong bucket. The effect washes out across hundreds of reports and does not wash out across five.

And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.