2018 Audi S4 Reliability ReportB grade · moderate risk · system-by-system breakdown
Quick Facts · 2018 Audi S4
- The system most likely to surface first: electrical/infotainment system (moderate severity).
- Has 2 NHTSA recalls on record — the most notable involves the air bags:frontal:passenger side:inflator module.
- Outscores the 2016 Audi S4 by 15 points — one of the stronger nearby years to consider.
Is the 2018 Audi S4 Worth Buying?
The 2018 Audi S4 is a potent, sophisticated sport sedan that offers remarkable daily drivability with exhilarating performance. While its core mechanicals are generally solid, particularly the engine and transmission, buyers must anticipate higher-than-average luxury maintenance costs and be prepared for potential complex electrical system diagnostics as the vehicle ages.
Biggest Strengths
- Robust ZF 8-speed automatic transmission
- Excellent build quality and premium interior materials
- Powerful and generally reliable EA839 3.0L TFSI engine
What Tends to Fail First on the 2018 Audi S4
The systems that break first on the 2018 Audi S4. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.
2018 Audi S4 Recall History
2 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
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.
SEATS
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.
What breaks on the 2018 Audi S4?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
OwnerKeep Passport · $499 · one-time
Just bought a 2018 Audi S4? Keep it that way.
Snap a receipt — AI logs it. Build an OwnerScore. Sell with a buyer-ready Passport dossier.
Other Audi S4 Years to Consider
Compare KeepScores across nearby years of the Audi S4. Click any year for its full report.
2018 Audi S4 Alternatives
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2018 Audi S4
Parts and accessories matched to your 2018 Audi S4
As an Amazon Associate I earn from qualifying purchases.
Frequently Asked Questions
Just bought a 2018 Audi S4? Keep it that way.
OwnerKeep Passport turns your Audi S4's care history into a luxury digital vault — AI-logged receipts, an OwnerScore that pays at resale, and a buyer-ready dossier in one tap.
- AI receipt OCR — snap and log
- Fuel & mileage tracker
- Tri-Score OwnerScore
- One-tap resale dossier PDF
Recommended Reading for the Audi S4
Most Reliable Cars to Buy Used (Top 10 Ranked)
Get our expert-ranked list of the 10 most reliable used cars you can buy today, saving money and avoiding future headaches with smart choices.
Jeep Wrangler vs Toyota 4Runner: Which Lasts Longer?
Get the definitive answer: Which truly lasts longer, the Jeep Wrangler or Toyota 4Runner? Our comparison reveals their long-term durability.
Toyota Tacoma vs Chevy Colorado: Reliability Compared
Explore a head-to-head reliability comparison of the Toyota Tacoma vs. Chevy Colorado. Discover which truck truly stands out for long-term dependability.