The 2018 Audi A4 has 1 NHTSA recall campaign affecting an estimated 208,332 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 80 complaints with NHTSA, most often about the unknown or other. Last updated July 13, 2026.
Recall campaigns
AIR BAGS21V8740002021-11-10208,332 affected
Defect
Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant…
Consequence
A disabled passenger air bag increases the risk of injury in the event of a crash.
Remedy
Dealers will replace the connecting cable and either the heating mat or entire seat cover, free of charge. Owner notification letters were mailed January 7, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 74E3. This recall is an expansion of Recall 19V-547…
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“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,â€� with status listed as passive/sporadic. This indicates a transmission / powertrain…”
“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,â€� with status listed as passive/sporadic. This indicates a transmission / powertrain…”
“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,â€� with status listed as passive/sporadic. This indicates a transmission / powertrain…”
“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’,â€� with status listed as passive/sporadic. The scan also showed u112100, described as…”
“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’,â€� with status listed as passive/sporadic. The scan also showed u112100, described as…”
“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’,â€� with status listed as passive/sporadic. The scan also showed u112100, described as…”
“The contact owned a 2018 audi a4. The contact stated that while driving at an undisclosed speed, there was fluid leaking from the front of the vehicle. No warning lights were illuminated. The contact also stated that while the vehicle was parked, there was a puddle of fluid leaking from the front…”
“This problem is extremely sporadic, and often remedies itself after car shut down, and sometimes require that the car sit for a period of time. I estimate the following issue happens ~1 time a month, or estimated 5% of the time. Weather (temperature specifically) does not appear to impact…”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2018 Audi A4 as of
July 13, 2026. Complaint narratives are consumer-submitted and unverified. This page
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