2018 Audi A8 Quattro

The 2018 Audi A8 Quattro represented a significant step forward for the luxury sedan, boasting cutting-edge technology, a refined driving experience, and opulent comfort. The model year offered a 3.0L turbocharged V6 engine producing 335 horsepower and 369 lb-ft of torque. It also had a 4.0L twin-turbocharged V8 making 460 horsepower and 487 lb-ft of torque, but those will not be discussed here. Both engines were mated to an 8-speed automatic transmission. Owners generally praised the A8 for its smooth ride, luxurious interior, and advanced tech features. However, some have voiced concerns about the complexity of the electronics and the potential for costly repairs.

Engine

3.0L Turbocharged V6

• Coolant Leaks
  • Description/Symptoms: Coolant leaking from the water pump or thermostat housing. Can cause overheating and low coolant levels.
  • Solution: Replace the faulty water pump or thermostat housing and any damaged hoses.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil leaking from the valve cover gaskets or the rear main seal. Can cause burning oil smell and visible oil stains.
  • Solution: Replace the leaking gaskets or seals.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found

Transmission

8-Speed Automatic

• Harsh Shifting/Hesitation
  • Description/Symptoms: Rough or delayed shifts, particularly between lower gears. Hesitation when accelerating.
  • Solution: Fluid service with the correct fluid type. In some cases, a software update or valve body replacement might be necessary.
  • Estimated Cost to Fix: $300 (fluid service) - $2000+ (valve body)
  • Recalls: None Found
• Transmission Mounts
  • Description/Symptoms: Excessive Vibration, especially at low speeds or during acceleration. Noises from under the vehicle when shifting or going over bumps.
  • Solution: Replace faulty transmission mount.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions
  • Description/Symptoms: Vehicle leaning to one side, failure to raise or lower, error messages related to the air suspension system.
  • Solution: Diagnose and replace faulty air struts, air compressor, or air lines.
  • Estimated Cost to Fix: $1000 - $4000+ per corner
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MMI system freezes, reboots unexpectedly, or becomes unresponsive.
  • Solution: Software updates, replacement of the MMI control unit.
  • Estimated Cost to Fix: $300 - $2000+
  • Recalls: None Found
• Sensor Failures (Parking Sensors, Driver Assistance)
  • Description/Symptoms: False alarms, failure to detect obstacles, error messages related to driver assistance features (lane assist, adaptive cruise control).
  • Solution: Diagnose and replace faulty sensors.
  • Estimated Cost to Fix: $200 - $1000+ per sensor
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Battery drains quickly, especially when the car is not driven regularly. Can cause starting problems.
  • Solution: Diagnose and repair parasitic drains, replace the battery if it is faulty.
  • Estimated Cost to Fix: $150 - $500+
  • Recalls: None Found

Exterior

• Automatic Door Closers
  • Description/Symptoms: Failure of the doors to automatically soft close.
  • Solution: Repair or replacement of the actuator.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof will not open, close, or seal properly. Possible leaks
  • Solution: Repair or replace any broken rails and/or faulty motor.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found

Summary

The 2018 Audi A8 Quattro offers a luxurious and technologically advanced driving experience, but it is not without its potential problems. The most common issues revolve around the complex electrical system, the air suspension, and potential engine and transmission issues. The cost of repairs can be significant, particularly for the air suspension and infotainment system. Potential buyers should be aware of these potential issues and factor them into their purchasing decision. A thorough pre-purchase inspection by a qualified mechanic is highly recommended.