The 2018 Audi S5 has 26 NHTSA owner complaints and 2 recalls on file (U.S. federal records, as of August 2026). The most-reported system is engine at 8 complaints (~$3,100 to repair). Source: NHTSA Office of Defects Investigation.
Solid reliability overall. Common issues are concentrated in a few systems.
0
Critical
2
Severe
0
Moderate
Should you avoid this 2018 S5?
Generally reliable
Buyable on the data — keep up the usual maintenance and inspect normally.
No systemic severe-failure pattern in the complaint record
Reliability score 8.0/10 — above the segment average
2 recall campaigns on file
Our read of the federal NHTSA complaint and recall record for this exact year and model —
not a substitute for a pre-purchase inspection. How we score.
Buying a used 2018 Audi S5? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or
make the seller fix it before you sign.
What to inspect on this specific car
engine — 8 owner reports
· ~$3,100 to fix
Recalls to confirm are done
Run the VIN from the listing — 2 active recalls on this model. Recall repairs are always free.
Verdict for buyers: 8.0/10 model. The priciest documented failure is
engine (~$3,100) — get the
seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report
tells you what this exact car has been through. Smart buyers get both.
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in
this vehicle's actual NHTSA record, not generic advice.
Dash light, leak, worn part — snap it and we'll read it against this car's record.
Photo attached — type a question or just hit Ask.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
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What owners are saying
recent NHTSA-filed complaints · verbatim
2018 S5· visibility
During a drive on an interstate highway in tennessee on12/27/19, the sunroof suddenly exploded. Speed was approximately 75-80 MPH on a cloudy day with the temperature in the low 60's f. Without any prior indications, there was a loud boom. A section of the sunroof approx 18' in…
An Audi dealer has just diagnosed my 2018 S5 Cabriolet Prestige with vacuum system contamination caused by water pump failure. I had requested the diagnostic due to small coolant leaks on the engine and loss of coolant in the expansion tank. No warning lights and no overheating…
Component/System: Passenger Occupant Detection System (PODS) / Airbag system — Recall 74E3 / NHTSA 21V874. What Happened: The passenger airbag may switch off even when the seat is occupied due to a faulty PODS wiring connection. The warning message “Passenger Airbag Off”…
I was returning home from visiting family. My drive was approx 140 miles home. The car was running/driving normally when I stopped at a gas station to get a snack. When I came back to my car and attempted to start it, it would not start and had camshaft and crankshaft sensor…
Had a problem with your 2018 Audi S5?
File a complaint with NHTSA → It's free and official — owner filings are what build the federal safety record behind this page.
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
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.
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.
Common questions
Is the 2018 Audi S5 reliable?
Mostly yes. With a reliability score of 8.0 out of 10 based on 26 owner complaints filed with NHTSA, the 2018 Audi S5 is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2018 Audi S5?
On the NHTSA data, the 2018 Audi S5 does not need avoiding. Buyable on the data — keep up the usual maintenance and inspect normally. The record behind that call: No systemic severe-failure pattern in the complaint record; Reliability score 8.0/10 — above the segment average; 2 recall campaigns on file. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2018 Audi S5?
Inspect the engine first — it's the most-reported issue on this model, with 8 owner complaints filed. Average repair cost runs about $3,100 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2018 Audi S5 a good used car to buy?
It scores 8.0 out of 10 on our NHTSA-based read of 26 owner complaints. The main thing to watch is engine. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2018 Audi S5?
Based on NHTSA records, the most-reported issue is engine, with 8 complaints filed. Average repair cost runs about $3,100 at an independent shop.
What's the most expensive thing that goes wrong?
The engine is one of the costlier repair items. Average repair cost runs about $3,100 at an independent shop. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Audi S5 has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2018 Audi S5?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 26 complaints on file and the costliest repair averaging $3,100, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.
Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database, last synced 3 days ago. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Audi/S5.
Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics.
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