This page covers 3 recalls and EPA fuel economy for the 2020 Audi S4.
23 mpg combined
10.2 L/100km
Compact 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 2020 Audi S4 has 3 recalls, the most serious involving a rear axle lock nut that can break and knock the rear wheels out of alignment, causing loss of vehicle control.
The second recall affects the front passenger airbag's occupant classification sensor, which detects whether the seat is occupied by an adult and adjusts airbag deployment accordingly. If the sensor fails, the passenger airbag can be disabled entirely, leaving a front-seat passenger without airbag protection in a crash. On the tire side, the same rear axle misalignment issue that can cause a loss of control can also produce premature or uneven tire wear over time, which raises its own crash risk as tread wears down unevenly across the rear tires.
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.
What the fix does
Dealers will inspect rear axle alignment, adjust if needed, and replace any prematurely or unevenly worn tires at no cost.
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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.
