2008 Audi A5 Owner Complaints

2008 Audi A5 3.2L S-Line Coupe experiencing severe water intrusion into trunk compartment causing progressive failure of multiple electronic modules. Water enters through a known design defect in the trunk seal and drainage pathway, pooling in the spare tire well where critical electronic control modules are mounted. Affected systems: (1) Complete audio and entertainment system failure due to amplifier module destroyed by water damage. (2) Electronic parking brake malfunction with brake failing to engage and disengage reliably, creating serious rollaway risk on inclines. (3) General electrical instability with intermittent warning lights and system malfunctions. (4) Severe parasitic battery drain with vehicle battery draining overnight due to water-damaged modules drawing constant current. This is a well-documented design flaw across the entire B8 A5 and S5 platform from 2008 to 2013. The manufacturer engineered a protective cover part for later production models, confirming awareness of the water intrusion defect, but never issued a recall or retrofit for earlier vehicles. Hundreds of owners have reported identical failures on major Audi enthusiast forums. The electronic parking brake failure is a serious safety hazard as the vehicle may roll uncontrolled on grades when parked.

NHTSA ID

11731285

Incident

Apr 15, 2026

THE AUDIO ENTERTAINMENT SYSTEM HAS STOPPED WORKING. THE AUDIO SYSTEM POWERS ON, POWERS OFF IMMEDIATELY AFTER ABOUT 5. SECONDS

NHTSA ID

11103665

Incident

Jun 24, 2018

Mileage

100,000 mi

TAKATA RECALL ON MAY 23, 2016, MY AUDI A5 WAS RECALLED. SAFETY RISK WAS CLAIMED TO BE "IF THE AIRBAG CONTROL UNIT FAILS, SAFETY SYSTEMS SUCH AS SEAT BELT PRETENSIONERS AND AIRBAGS MAY NOT DEPLOY IN THE EVENT OF A CRASH, INCREASING THE RISK OF OCCUPANT INJURY." 6 MONTHS LATER, THE RECALL IS "INCOMPLETE. REMEDY NOT YET AVAILABLE" I AM TRYING TO TRADE IN MY VEHICLE, BUT THE DEALER SAYS THE LACK OF RECALL FIX WILL NEGATIVELY IMPACT THE VALUE OF THE VEHICLE.

NHTSA ID

10918080

Incident

May 23, 2016

TL* THE CONTACT OWNS A 2008 AUDI A5. THE CONTACT STATED THAT THE DRIVER'S SIDE AIR BAG SENSOR AND THE PARKING BRAKE WARNING LIGHT WAS ILLUMINATED. IN ADDITION, THE HORN HAD FAILED. THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT MECHANIC, WHO DETERMINED THAT THE DEFECTS WERE ALL CAUSED BY A FAULTY STEERING WHEEL SPRING COLUMN. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 35,000.

NHTSA ID

10563988

Incident

Nov 1, 2013

Mileage

35,000 mi

MAIN BEAM/LEFT DIPPED HEADLIGHT WARNING CAME ON. SECOND TIME DEALING WITH THIS PROBLEM AND HAVE READ THAT AUDIS ARE NOTORIOUS FOR THE SAME ISSUE BUT NOTHING HAS BEEN DONE TO CORRECT IT. HAVING BULB REPLACED IS COSTING 360.00 AT THE AUDI SERVICE DEPARTMENT. SOMETHING MUST BE DONE TO RECTIFY THIS PROBLEM. A FACTORY RECALL SHOULD BE ORDERED. THANK YOU *TR

NHTSA ID

10546793

Incident

Sep 28, 2013

Mileage

46,300 mi