2018 Audi RS3

The 2018 Audi RS3 is a high-performance compact sedan boasting a turbocharged 2.5-liter inline-5 engine, delivering 400 horsepower and 354 lb-ft of torque. The RS3 is lauded for its exhilarating acceleration, agile handling, and distinctive engine sound. However, some owners have reported experiencing certain issues. There is only one engine and transmission option available, so all issues listed under those sections apply to all 2018 Audi RS3 models. People like the RS3 for its performance, but some dislike the firm ride and the relatively small back seat.

Engine

2.5L Turbocharged Inline-5

• Turbocharger Failure
  • Description/Symptoms: Loss of power, whistling or grinding noises from the engine bay, check engine light. Premature failure of the turbocharger.
  • Solution: Replace the turbocharger.
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found
• Oil Consumption
  • Description/Symptoms: Excessive oil consumption requiring frequent top-ups. Blue smoke from the exhaust is also a symptom.
  • Solution: Some owners have reported success with using a heavier weight oil. In more severe cases, piston ring replacement or even engine replacement may be needed.
  • Estimated Cost to Fix: $100+ for oil change, $3,000+ for piston ring replacement, $10,000+ for engine replacement.
  • Recalls: None Found
• Carbon Buildup
  • Description/Symptoms: Rough idle, reduced power, misfires, poor fuel economy.
  • Solution: Carbon cleaning of the intake valves.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found

Transmission

7-Speed Dual-Clutch (S Tronic)

• Mechatronic Unit Failure
  • Description/Symptoms: Jerky shifting, delayed engagement, transmission slipping, error messages on the dash.
  • Solution: Replace or rebuild the mechatronic unit.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Clutch Wear
  • Description/Symptoms: Slipping during acceleration, especially in higher gears. Jerky engagement, shuddering.
  • Solution: Replace the clutch packs.
  • Estimated Cost to Fix: $2,500 - $4,500+
  • Recalls: None Found

Suspension

• Adaptive Damper Malfunction (If Equipped)
  • Description/Symptoms: Stiff ride, failure to adjust damping settings, error messages on the dash.
  • Solution: Replace the affected damper(s).
  • Estimated Cost to Fix: $800 - $1,500 per damper+
  • Recalls: None Found

Electrical

• Infotainment System Issues
  • Description/Symptoms: Freezing, Crashing, Bluetooth connectivity problems, unresponsive touchscreen.
  • Solution: Software updates, replacement of the infotainment unit.
  • Estimated Cost to Fix: $0 (Software update) - $2,000+ (Replacement)
  • Recalls: None Found
• Sensor Failures
  • Description/Symptoms: Faulty readings from sensors, leading to warning lights and potential performance issues. Commonly reported sensors include oxygen sensors, mass airflow sensors, and wheel speed sensors.
  • Solution: Replace the faulty sensor.
  • Estimated Cost to Fix: $200 - $500+ per sensor
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing smoothly, making excessive noise, or leaking.
  • Solution: Repair or replacement of the sunroof motor, track, or seals.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Summary

The 2018 Audi RS3 is a powerful and engaging sports sedan, but it’s not without its potential issues. Engine issues like turbocharger failure and carbon buildup can be costly, while transmission problems, particularly with the mechatronic unit or clutch packs, are also a concern. Electrical gremlins in the infotainment system and potential suspension issues with the adaptive dampers (if equipped) can add to the ownership costs. While some issues may be minor, others can be quite expensive to repair. Potential buyers should have a pre-purchase inspection done by a qualified Audi mechanic to identify any existing or potential problems.