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2018 Audi S5

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By Research the Car 3 min read

Here’s a comprehensive breakdown of common issues reported by owners of the 2018 Audi S5, organized by category and component. The 2018 Audi S5 is a performance-oriented coupe, sportback, or convertible that offers a blend of luxury and driving enjoyment. It’s powered by a 3.0-liter turbocharged V6 engine that produces 354 horsepower and 369 lb-ft of torque, paired with an 8-speed automatic transmission. Some owners praise the S5 for its stylish design, powerful engine, and comfortable interior. Common criticisms include infotainment system complexity, some reliability concerns, and higher maintenance costs compared to non-luxury vehicles.

Engine

3.0L Turbocharged V6

  • Coolant Leaks
    • Description/Symptoms: Coolant leaking from the thermostat housing or water pump area. This can cause the engine to overheat, potentially leading to serious damage. Visible coolant puddles under the car are common, along with a low coolant level warning on the dashboard.
    • Solution: Replacing the thermostat housing and/or water pump, including seals and gaskets. Pressure testing the cooling system after repair is recommended.
    • Estimated Cost to Fix: $500 - $1200+
    • Recalls: None Found
  • Oil Leaks
    • Description/Symptoms: Oil leaking from various locations, including valve cover gaskets, timing chain cover, or rear main seal. Burning oil smell, visible oil leaks on the engine or ground, and low oil level warnings are typical symptoms.
    • Solution: Replacing the leaking gaskets or seals. In more severe cases, the entire valve cover or timing chain cover may need to be replaced.
    • Estimated Cost to Fix: $200 - $1500+ depending on location and severity.
    • Recalls: None Found

Transmission

8-Speed Automatic Transmission

  • Rough or Delayed Shifting
    • Description/Symptoms: Harsh shifts, delayed engagement of gears, or a noticeable “clunk” when shifting. This can be more pronounced during cold starts or at lower speeds.
    • Solution: In some cases, a transmission fluid flush and adaptation reset can improve shifting. More severe cases may require valve body replacement or, in rare cases, a full transmission replacement.
    • Estimated Cost to Fix: $300 (fluid flush) - $4000+ (transmission replacement)
    • Recalls: None Found

Suspension

  • Adaptive Damper Malfunction (If Equipped)
    • Description/Symptoms: Error messages related to the suspension system, uneven ride quality, or a noticeable difference in handling between the left and right sides of the car.
    • Solution: Diagnosing the specific damper that is malfunctioning and replacing it. The control module might also need to be checked and reprogrammed.
    • Estimated Cost to Fix: $800 - $2000+ per damper depending on labor and parts costs.
    • Recalls: None Found

Electrical

  • Infotainment System Freezing/Crashing
    • Description/Symptoms: The MMI (Multi Media Interface) system freezing, becoming unresponsive, or restarting unexpectedly. This can affect navigation, audio, and other vehicle functions.
    • Solution: Software updates, resetting the MMI system, or replacing the MMI control unit.
    • Estimated Cost to Fix: $0 (software update) - $1500+ (MMI control unit replacement)
    • Recalls: None Found
  • Sensor Issues (Parking Sensors, Blind Spot Monitoring)
    • Description/Symptoms: False alarms, failure to detect obstacles, or error messages related to parking sensors or blind spot monitoring systems.
    • Solution: Cleaning or replacing the faulty sensor. Checking the wiring harness for damage or corrosion.
    • Estimated Cost to Fix: $200 - $600+ per sensor depending on location and complexity.
    • Recalls: None Found

Exterior

  • Sunroof Issues
    • Description/Symptoms: Sunroof not opening or closing properly, getting stuck, or making excessive noise. Water leaks can also occur.
    • Solution: Cleaning and lubricating the sunroof tracks. Replacing damaged components such as the motor or cables. Repairing any leaks.
    • Estimated Cost to Fix: $150 - $1000+
    • Recalls: None Found

Interior

  • Rattling or Squeaking Noises
    • Description/Symptoms: Various rattles and squeaks emanating from the dashboard, door panels, or rear deck.
    • Solution: Locating the source of the noise and tightening loose components, applying felt tape, or using sound-deadening materials.
    • Estimated Cost to Fix: $50 - $500+ depending on the complexity and labor required.
    • Recalls: None Found

Summary

The 2018 Audi S5 can be a rewarding car to own, but potential buyers should be aware of the common issues. Engine and electrical issues are the most frequently reported, followed by some transmission concerns. While not all S5s will experience these problems, understanding the potential risks can help you make a more informed purchase and budget accordingly. Costs can vary widely depending on the specific issue and repair shop, but some repairs can be relatively expensive, especially those involving the transmission or electrical systems.

Audi, S5
Audi S5 2018
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