2018 Toyota Avalon

The 2018 Toyota Avalon is a full-size sedan known for its comfortable ride, spacious interior, and reliability. Most 2018 Avalons came equipped with a 3.5-liter V6 engine producing 268 horsepower and 248 lb-ft of torque, paired with an 8-speed automatic transmission. A hybrid version was also available, featuring a 2.5-liter inline-4 engine paired with an electric motor, producing a combined 200 horsepower, and an eCVT transmission. Owners generally appreciate the Avalon’s smooth ride, quiet cabin, and ample passenger space. However, some common complaints include the infotainment system’s interface and the somewhat uninspired driving dynamics.

Engine

3.5L V6

• Oil Leaks
  • Description/Symptoms: Oil leaks can develop from various points on the engine, including the valve cover gaskets and the timing cover. Symptoms include visible oil drips under the car, the smell of burning oil, and low oil levels.
  • Solution: Replacing the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $1000+, depending on the location of the leak.
  • Recalls: None Found
• Knocking Noises
  • Description/Symptoms: Some owners report hearing knocking noises from the engine, especially during cold starts. This could be due to worn bearings or piston slap.
  • Solution: Diagnosing the cause of the knocking noise and performing necessary repairs. This could range from replacing bearings to replacing the entire engine.
  • Estimated Cost to Fix: $500 - $5000+, depending on the severity.
  • Recalls: None Found

2.5L Inline-4 (Hybrid)

• Engine Misfires
  • Description/Symptoms: Reports of engine misfires, often accompanied by a check engine light and rough idling.
  • Solution: Could be caused by faulty ignition coils, spark plugs, or fuel injectors. Diagnosis is necessary to pinpoint the exact cause.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Transmission

8-Speed Automatic (3.5L V6)

• Harsh Shifting
  • Description/Symptoms: Some owners have reported harsh or erratic shifting, especially between certain gears. This can be caused by low transmission fluid, worn solenoids, or valve body issues.
  • Solution: Flushing and replacing the transmission fluid. If that does not resolve the issue, replacing the solenoids or valve body.
  • Estimated Cost to Fix: $150 - $1500+
  • Recalls: None Found

eCVT (2.5L Inline-4 Hybrid)

• No Issues Found

Suspension

• Strut/Shock Absorber Failure
  • Description/Symptoms: Premature failure of struts or shock absorbers, leading to a bouncy or unstable ride. This can also cause increased tire wear.
  • Solution: Replacing the faulty struts or shock absorbers.
  • Estimated Cost to Fix: $400 - $1000+ per axle.
  • Recalls: None Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: Freezing, lagging, or unresponsive touchscreen. Issues with Bluetooth connectivity and navigation.
  • Solution: Software updates, or replacement of the head unit.
  • Estimated Cost to Fix: $0 - $1500+, depending on whether a software update fixes the issue.
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Premature battery failure or excessive battery drain, leading to difficulty starting the car.
  • Solution: Diagnosing the cause of the battery drain (e.g., faulty alternator, parasitic drain) and replacing the battery if necessary.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Exterior

• Automatic High Beam Issues
  • Description/Symptoms: Automatic High Beams may fail to engage, disengage unexpectedly, or flicker.
  • Solution: Calibration of the sensors or replacement of the headlight assembly.
  • Estimated Cost to Fix: $100 - $800+
  • Recalls: None Found

Interior

• Dashboard Cracking
  • Description/Symptoms: Cracking on the dashboard surface, especially in areas exposed to direct sunlight.
  • Solution: Replacement of the dashboard.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found

Summary

The 2018 Toyota Avalon is generally a reliable vehicle, but owners have reported some issues. Engine oil leaks and transmission harsh shifting are common complaints, with repair costs ranging from moderate to potentially expensive. Electrical issues with the infotainment system and battery drain can also occur. While not all Avalons will experience these problems, potential buyers should be aware of these common issues during their inspection and pre-purchase research. The severity of these issues varies, but addressing them promptly can help prevent further damage and maintain the Avalon’s value.