"How reliable is the 2005 Audi A4?"

"Based on 266 NHTSA complaints, the 2005 Audi A4 has a median complaint mileage of 59000 miles. The most common issue is EXTERIOR LIGHTING."

"What are common problems with the 2005 Audi A4?"

"The most frequently reported component in NHTSA complaints for the 2005 Audi A4 is EXTERIOR LIGHTING, accounting for a significant portion of the 266 total complaints filed."

2005 Audi A4: Reliability Data

Source: NHTSA — 266 complaints

266

Total Complaints

59,000mi

Median Mileage

EXTERIOR LIGHTING

Top Issue

Crash Reports

When Do Complaints Happen?

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

47,170 25th Percentile

59,000 Median Mileage

89,334 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

EXTERIOR LIGHTING

AIR BAGS

ELECTRICAL SYSTEM

POWER TRAIN

ENGINE

VEHICLE SPEED CONTROL

FUEL SYSTEM, GASOLINE

ENGINE AND ENGINE COOLING

STEERING

POWER TRAIN:AUTOMATIC TRANSMISSION

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"AT 2,200 MILES, A HEADLIGHT WARNING LIGHT CAME ON, AND I TOOK MY CAR TO THE DEALERSHIP. I WAS TOLD THAT A MOUSE HAD CLIMBED INTO MY ENGINE, BUILT A NEST OUT OF THE HOOD INSULATION, AND CHEWED THROUGH WIRES. AUDI REFUSED TO COVER ANY DAMAGES. THIS INCIDENT COST ME $1,400. I HAVE PARKED IN THE SAM..."

"CONTACT STATES: BOUGHT A NEW 2005 AUDI, A4 AND IT HAS BEEN IN THE SHOP 3 TIMES FOR THE SAME PROBLEM. THE AIR BAG SENSOR LIGHT STAYS ON, AND AIR BAG MECHANISM WILL HAVE TO REPLACED. THIS IS AN AUDI A4, 2005.*AK"

"THE VEHICLE HESITATES FOR 2 TO 3 SECONDS WHEN TRYING TO ACCELERATE FROM A COMPLETE STOP. FROM JUNE 23RD, 2005, WHEN I TOOK DELIVERY OF THE CAR, UNTIL JULY 1,2005, I HAVE ALMOST BEEN T-BONED WHILE TRYING TO MAKE A LEFT HAND TURN, 3 TIMES. THE CAR IS DANGEROUS!! I TOOK IT IN TO THE DEALER ON JULY TH..."

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