There are 2 owner-reported suspension complaints for the 2014 Audi A4in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
DESCRIPTION OF THE SAFETY DEFECT On February 24, 2026, an Audi-certified technician at Audi of Milwaukee discovered substantial rust perforation of the rear subframe on my 2014 Audi A4 Allroad (Repair Order #[XXX]). The technician documented the condition as follows: “INSPECTED REAR SUBFRAME CORROSION. RECOMMEND TO REPLACE REAR SUBFRAME AND RELATED PARTS.” The quoted cost to replace the rear subframe, control arms, and related components is $11,583.00. The vehicle was otherwise inspected as being in excellent condition with no body panel corrosion. Root Cause: Manufacturer-Installed Plastic Shield Design Defect (B8/B8.5 and B9 Platforms) The corrosion is caused by a design defect present on the Audi B8/B8.5 and B9 platforms: plastic aerodynamic shields are installed by the manufacturer on both sides of the rear subframe. These plastic shields trap road salt, water, and debris directly against the bare steel subframe, preventing it from draining or drying. Even vehicle owners who regularly wash the undercarriage—as I did—cannot prevent salt accumulation behind these shields. This is not general road salt exposure. The plastic covers are an Audi-designed component that actively concentrates corrosive materials against the subframe. The corrosion therefore originates from a manufacturer design decision, not from owner neglect or normal environmental exposure. III. SAFETY RISK The rear subframe is a primary structural and suspension component. It mounts the rear suspension, differential, and drivetrain to the vehicle. Rust perforation of this component poses the following safety risks: •Structural failure of the subframe while driving, potentially causing sudden loss of vehicle control •Collapse of rear suspension leading to loss of steering stability •Separation of the rear drivetrain or differential from the vehicle under load •Increased risk of catastrophic failure when towing, carrying passengers, or during emergency maneuvers •No visible warning to the drive INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
TL* THE CONTACT OWNS A 2014 AUDI A4. WHILE DRIVING 45 MPH, THE VEHICLE BEGAN TO HESITATE AND AN ABNORMAL NOISE WAS HEARD. THE VEHICLE WAS TAKEN TO THREE DIFFERENT DEALERS. THE FIRST DEALER (AUDI MEMPHIS, LOCATED AT 1825 COVINGTON PIKE, MEMPHIS, TN 38128, (901) 388-8989) DIAGNOSED THAT THE CONTROL ARM BUSHING AND ALL FOUR TIRES NEEDED TO BE REPLACED. THE SECOND DEALER (AUDI WEST PALM BEACH, LOCATED AT 2101 OKEECHOBEE BLVD, WEST PALM BEACH, FL 33409, (561) 688-2000) DIAGNOSED THAT THE FRONT PASSENGER SIDE WHEEL BEARING NEEDED TO BE REPLACED. THE THIRD DEALER (AUDI FORT LAUDERDALE, LOCATED AT 1200 N FEDERAL HWY, FORT LAUDERDALE, FL 33304, (954) 876-4144) DIAGNOSED THAT ONE OF THE RIMS WAS BENT. THE VEHICLE WAS NOT COMPLETELY REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 55,000.
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.
Data synced from NHTSA on Apr 26, 2026