There are 2 stored owner reports matching the electrical system leading-label group for the 2008 Audi A5 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)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.
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.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.