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2018 Audi S4
Limited data: few reports on file, read the verdict loosely
Too few owner complaints are on file to affirm this car. Treat it as unproven, not endorsed, and lean hard on a professional pre-purchase inspection.
7 owner complaints · 2 recalls · data verified July 17, 2026 · source: NHTSA
What the record shows so far
Only 7 owner complaints on file for this exact model year, too few to judge long-term reliability. Treat this as unproven, not endorsed, and lean on a professional inspection.
The math, shown
Full methodology →Complaints filed per year
Fading = early teething worked out. Climbing = problems aging in.
How it crashes
NHTSA’s own crash tests, separate from the reliability score above.
NHTSA crash-tested this model year but didn’t publish an overall star rating for it.
Source: nhtsa.gov/ratings. Star ratings compare vehicles within the same class and size, not across every car on the road.
The road ahead
What breaks on a 2018 Audi S4, plotted where owners report it happening.
Engine
57%4 complaints · 2 in the last 2 years
“PCV housing and lines failed. Caused pressure to build up thus shooting off the oil cap shooting oil everywhere! in addition to that it is a huge fire hazard consideri…”
Suspension
14%1 complaints
“Audi Dealer inspection revealed Rear spring is broken and mounts are deteriorating. Dealer states not common and would result in accident if not repaired. Research ind…”
Brakes
14%1 complaints
“THE VEHICLE'S PRE SENSE AUTO-BRAKING AND BRAKING ALERT JOLT HAS BEEN ACTIVATING ERRONEOUSLY AND HAVE ALMOST CAUSED ACCIDENTS AT SPEED. THE SYSTEM CANNOT BE PERMANENTLY…”
Body & structure
14%1 complaints
“THERE ARE TWO LARGE "UNDERRIDE GUARD" PANELS ON THE UNDERSIDE OF THE VEHICLE THAT ARE FASTENED BY SMALL, LOOSE-FITTING PLASTIC CLIPS. THERE IS ALSO FELT SOUND-DEADENIN…”
Recalls (2)
Safety recall repairs are free at the brand’s franchised dealers. Before buying, run the VIN at nhtsa.gov/recalls and make the seller show the work was done.
Seats · 21V874000
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 Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.
Risk: A disabled passenger air bag increases the risk of injury in the event of a crash.
Fix: 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 (74D9). Vehicles previously repaired under 19V-547 will need to return for the new remedy.
Air Bags · 19V547000
Volkswagen Group of America, Inc. (Audi) is recalling certain 2018-2019 Audi RS5 Sportback, 2018 S5 Cabriolet, S5 Sportback, S5 Coupe, S4 Sedan, A5 Cabriolet, A5 Sportback, A5 Coupe, and 2017-2018 A4 Sedan and A4 Allroad vehicles. Oxidation on the Passenger Occupant Detection System (PODS) connecting cable may cause the software to misdiagnose a malfunction and disable the passenger air bag.
Risk: A disabled passenger air bag increases the risk of injury in the event of a crash.
Fix: Audi will notify owners, and dealers will install cable ties to the harness, free of charge. The recall began September 9, 2019. Owners may contact Volkswagen customer service at 1-800-893-5298. Audi's number for this recall is 74D9.
Before you hand over money
Verify the recall work was done
NHTSA’s free lookup shows whether this exact car had its recall remedies completed.
Free NHTSA VIN check ↗Get a pre-purchase inspection
A $150 to $250 independent inspection of this exact 2018 Audi S4 beats every score on the internet, including ours.
What to ask forNot set on the 2018? See how every S4 model year scores →
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What owners say
Real owners of this exact model-year, shown separately from the NHTSA score. If they disagree, that’s worth knowing.