2018 Audi A4 recalls & problems

Recent owner complaints

• Oct 12, 2026Tires › Valve
  I am reporting a serious vehicle safety incident involving my 2018 Audi A4. On XXX, while traveling from [XXX] to [XXX] with my [XXX] son in the vehicle, all four tire valve stems failed during a single interstate journey. The first failure occurred on the front-left tire, causing nearly instantaneous tire deflation. After an emergency repair, I continued driving, but the remaining three valve stems subsequently failed in succession. Each failure created a potentially dangerous situation involving sudden tire-pressure loss. A tire technician observed significant cracking and deterioration of the rubber valve stems. The remaining stems were reportedly so deteriorated that touching them could…
• Apr 15, 2026Structure › Body
  A vehicle diagnostic scan dated 04/15/2026 showed electrical communication faults involving vehicle control modules. The scan showed U014100, described as “Lost Communication With Body Control Module ‘A’,” with status listed as passive/sporadic. The scan also showed U112100, described as “Data bus message missing,” with status listed as active/static. This is being reported as a safety concern because body-control module, gateway, and data-bus communication faults can affect vehicle electrical functions, warning systems, access/locking systems, lighting or body-control functions, driver information, and other vehicle systems that rely on module communication. The concern is…
• Apr 15, 2026Power train
  A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: P084100, described as “Transmission fluid pressure sensor/switch A range/performance,” with status listed as passive/sporadic. This indicates a transmission / powertrain control concern involving the transmission fluid pressure sensor, transmission electronics, wiring, control logic, pressure monitoring, or related powertrain components. The vehicle also has prior transmission/powertrain history, including a March 2023 transmission-pan-gasket concern documented in service records, so this later transmission electronics fault is being reported in that broader…
• Mar 23, 2023Structure › Body
  The vehicle has a recurring interior rattle / loose-trim concern involving interior panels, trim, speaker/subwoofer area, rear shelf, dashboard area, or related mounting components. The noise is not merely a comfort concern if it is caused by a loose component, fastener, grille, panel, or speaker housing that may move, worsen, detach, or distract the driver. This is being reported as a safety concern because loose interior trim or components can distract the driver, interfere with normal vehicle use, create uncertainty about whether a component is secured, and may indicate improper fastening, panel fitment, speaker/subwoofer mounting, or body/electrical component installation issues. If the…
• Jan 1, 2022Air bags
  The vehicle is subject to a Passenger Occupant Detection System / PODS safety recall involving the front passenger seat occupant-detection system and passenger airbag status. The concern is that the system may incorrectly detect whether a passenger is seated and may switch off or affect the front passenger airbag when the seat is occupied. This is being reported because the recall remedy was not completed, was delayed, was not properly resolved, or the concern remains unresolved. A malfunctioning passenger occupant detection system can affect whether the passenger airbag deploys as intended in a crash. The issue involves the airbag system, front passenger seat occupant detection, related…
• Aug 27, 2024Electrical system
  The short-term MPG / fuel-consumption display gives illogical and inconsistent readings. The display can show a significant drop in short-term fuel economy after the vehicle has been parked, locked, and not running, as if the system is incorrectly factoring parked/off time into the MPG calculation. This suggests a possible fault in the onboard computer, instrument cluster, fuel-consumption calculation, sensor input, software, ECU/module logic, or related electrical system. This is being reported as a safety concern because inaccurate fuel-consumption or range-related information can mislead the driver about fuel usage and remaining range, and it may indicate a broader vehicle…
• Aug 27, 2024Electrical system
  The vehicle intermittently gives a false proximity/collision warning while stationary or while maneuvering at low speed. The sensors beep and display a warning on the screen as if an object is about to hit the vehicle, even when nothing around the vehicle has changed and no object is present. This appears to involve the parking/proximity warning system, sensor system, control module, wiring, calibration, or broader electrical/driver-assistance system. This is being reported as a safety concern because false collision/proximity warnings can distract the driver, reduce trust in the vehicle’s warning systems, cause unnecessary braking or hesitation, and may indicate a malfunction in the…
• Aug 27, 2024Engine
  The engine oil level has been gradually dropping and has required monitoring and/or adding oil between normal service intervals. The exact source is unknown. It may involve abnormal oil consumption, an external oil leak, internal engine oil consumption, PCV/oil separator issue, turbo-related oil consumption, gasket/seal issue, or oil loss that is not leaving an obvious visible puddle. This is being reported as a safety concern because low engine oil or abnormal oil loss can lead to low oil pressure, warning messages, engine overheating or damage, smoke, oil contacting hot engine/exhaust components, limp mode, stalling, or loss of propulsion while driving. The issue should be inspected…

Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.