At a glance
What can fail
The rear axle alignment was not inspected after previous recall repairs were completed, which could result in improper wheel positioning and uneven tire wear.
This page covers 5 recalls, 25 owner complaints and EPA fuel economy for the 2020 Audi S5.
23 mpg combined
10.2 L/100km
Subcompact Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
The dominant pattern in 2020 Audi S5 complaints centers on the MMI infotainment system repeatedly rebooting while the car is in use. Owners across multiple reports describe the system cycling through restarts roughly every 30 to 90 seconds, both while parked and while driving. The practical consequence they flag most often is losing the backup camera mid-reverse along with the rear parking and proximity sensors, which fall under the back-over prevention system, the single most-reported category. The forward collision avoidance system and front camera feed are also described as going offline during these reboot cycles. The electrical system complaints appear closely tied to the same MMI behavior rather than representing a separate set of failures. Several owners note the issue started abruptly and then became constant, with the reboot loop reproducible every time the vehicle is running.
25
Total Complaints
By System
Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database.
The 2020 Audi S5 has 5 recalls, the most serious involving a rear axle lock nut that can break and knock the rear wheels out of alignment, reducing steering stability and raising the risk of losing control.
The rear axle issue also connects to a tire wear concern: when rear alignment shifts, tires can wear unevenly or prematurely, reducing grip over time. These two issues share the same underlying cause and together represent the most significant mechanical risk on this vehicle.
Two recalls involve rear wiring that runs near the spare wheel well. In a rear collision, the wiring harness in that area can sustain damage, which may prevent the doors from being opened from the outside and can disable the hazard lights, making the car harder to see by other drivers at the scene. Prior repair attempts did not fully resolve this issue, and the fix was extended to address it more completely.
There is also a concern with the front passenger airbag's occupant classification sensor. This sensor determines whether a passenger is present and what kind of person is seated, and a fault can cause the system to disable the passenger airbag entirely. If that happens in a crash, the front-seat passenger loses the protection the airbag would have provided.
At a glance
What can fail
The rear axle alignment was not inspected after previous recall repairs were completed, which could result in improper wheel positioning and uneven tire wear.
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What the fix does
Dealers will inspect rear axle alignment, adjust if needed, and replace any prematurely or unevenly worn tires at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A cable connecting the seat heater to the passenger air bag detection system may develop a contact fault, causing the system to incorrectly disable the passenger air bag.
What the fix does
Dealers will replace the connecting cable and either the heating mat or entire seat cover at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The lock nut securing the trailing arm on the rear axle can break due to stress corrosion, potentially affecting rear suspension stability.
What the fix does
Dealers will replace the lock nuts and associated bolts if needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The wiring harness for the rear lights may lack protective covering in the spare wheel well, risking damage from abrasion.
What the fix does
Dealers will apply protective covering to the wiring harness at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Protective tape may be missing from a wiring harness in the spare tire area. In a rear crash, the harness could get damaged, potentially disabling door locks and hazard lights.
What the fix does
A dealer will apply protective tape to the rear light wiring harness.
Summarized — see the official notice for exact wording, dates, and contacts.