2004 Audi A6: Reliability Data

Source: NHTSA — 44 complaints
44
Total Complaints
72,000mi
Median Mileage
FUEL SYSTEM, GASOLINE
Top Issue
3
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

40,000 25th Percentile
72,000 Median Mileage
98,824 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

FUEL SYSTEM, GASOLINE
4
WHEELS:RIM
3
FUEL/PROPULSION SYSTEM
3
ELECTRICAL SYSTEM
3
AIR BAGS
2
ENGINE AND ENGINE COOLING
2
SERVICE BRAKES
2
ELECTRONIC STABILITY CONTROL (ESC)
2
SEATS
2
VEHICLE SPEED CONTROL
2

Severity Assessment

3
Crashes
2
Fires
3
Injuries
0
Deaths

Sample Complaint Reports

"OUR NEW AUDI A6 HAD THE P6 P235/R17 INSTALLED AS ORIGINAL EQUIPMENT. WITHIN THE FIRST 4,000 MILES, ALL UNDER NORMAL DRIVING CONDITIONS, A LARGE BULGE DEVELOPED ON THE SIDEWALL OF ONE OF THE REAR TIRES. THIS CREATED A VERY DANGEROUS DRIVING CONDITION. WHEN WE HAD REPORTED THIS ISSUE TO OUR DEALER,..."
"I WOULD LIKE TO BRING TO YOUR ATTENTION A VERY SERIOUS AND DANGEROUS ISSUE I AM HAVING WITH MY 2004 AUDI A6 2.7T S LINE. THE ISSUE IS THE 18 INCH RIMS AND TIRES DELIVERED WITH THE CAR. AFTER APPROXIMATELY 10,000 MILES, I NOTICED WHILE TRAVELING AT 35 MILES PER HOUR THE CAR SHAKES, VIBRATES AND D..."
"CONSUMER HAS EXPERIENCED 4 TIRE BLOW OUTS WITHT EH CONTINENTAL TIRE EQUIPMENT.***NO ANSWER REQUIRED***. *MR THE TIRE DEALER REPLACED THE CONSUMER'S FOUR CONTINENTAL TIRES WITH WITH THE SAME DEFECTIVE MODEL TIRE WHICH HAD BLOWNOUT. AFTER THE REPLACEMENT THE CONSUMER EXPERIENCED THE FOURTH BLOWOUT O..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28