2006 Toyota Highlander

The 2006 Toyota Highlander is a popular mid-size SUV known for its reliability and practicality. It offered a comfortable ride, ample cargo space, and an optional third-row seat. However, like any vehicle, it has its share of common problems. Engine options included a 2.4L inline-4 producing 155 horsepower and 163 lb-ft of torque, and a 3.3L V6 producing 215 horsepower and 222 lb-ft of torque. Both engines were paired with a 5-speed automatic transmission. People generally like the Highlander’s dependability and smooth ride, but some dislike its somewhat bland styling and occasional electronic issues.

Engine

2.4L Inline-4

• Excessive Oil Consumption
  • Description/Symptoms: Some owners reported excessive oil consumption, requiring frequent top-offs between oil changes. This can lead to engine damage if not monitored closely. Blue exhaust smoke may also be present.
  • Solution: Replacing piston rings is the most common solution.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

3.3L V6

• VVTi Oil Line Leak
  • Description/Symptoms: The VVTi (Variable Valve Timing intelligent) oil line can develop leaks, leading to oil loss and potential engine damage. Symptoms include oil spots under the vehicle and a burning oil smell.
  • Solution: Replacing the VVTi oil line.
  • Estimated Cost to Fix: $100 - $300
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: Leaking valve cover gaskets can lead to oil drips onto the exhaust manifold, causing a burning smell. Visible oil around the valve cover is also a common sign.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: None Found

Transmission

5-Speed Automatic (Both Engines)

• Harsh Shifting/Slipping
  • Description/Symptoms: Some owners have reported harsh shifting or slipping between gears, especially as the vehicle ages and accumulates mileage.
  • Solution: Fluid flush and/or transmission rebuild. In some cases, valve body replacement may be necessary.
  • Estimated Cost to Fix: $150 (fluid flush) - $3,000+ (rebuild)
  • Recalls: None Found

Suspension

• Rear Suspension Sag
  • Description/Symptoms: The rear suspension can sag over time, particularly on models with the optional third-row seat and/or frequent cargo hauling. This can affect ride quality and handling.
  • Solution: Replacing the rear shocks and/or springs. Air suspension, if equipped, may require repair or replacement of the air struts or compressor.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Front Strut Mount Noise
  • Description/Symptoms: Squeaking or clunking noises from the front suspension, especially when going over bumps, can indicate worn strut mounts.
  • Solution: Replacing the strut mounts.
  • Estimated Cost to Fix: $200 - $600
  • Recalls: None Found

Electrical

• Power Door Lock Actuator Failure
  • Description/Symptoms: One or more power door locks may stop working, requiring manual locking/unlocking.
  • Solution: Replacing the faulty door lock actuator(s).
  • Estimated Cost to Fix: $150 - $300+ per door.
  • Recalls: None Found
• Instrument Cluster Lighting Issues
  • Description/Symptoms: Dim or flickering lights in the instrument cluster, or complete failure of certain gauges.
  • Solution: Replacing bulbs or repairing the instrument cluster. In some cases, a replacement cluster may be necessary.
  • Estimated Cost to Fix: $50 - $500+
  • Recalls: None Found

Exterior

• Rear Hatch Strut Failure
  • Description/Symptoms: The rear hatch struts may weaken over time, causing the hatch to not stay open on its own.
  • Solution: Replacing the rear hatch struts.
  • Estimated Cost to Fix: $50 - $200
  • Recalls: None Found

Interior

• Dashboard Cracking
  • Description/Symptoms: The dashboard can develop cracks, particularly in warmer climates, due to sun exposure and age.
  • Solution: Dashboard replacement or cover.
  • Estimated Cost to Fix: $200 (cover) - $1,500+ (replacement)
  • Recalls: None Found
• Center Console Latch Failure
  • Description/Symptoms: The latch on the center console storage compartment can break, preventing the console from closing properly.
  • Solution: Replacing the latch or the entire center console lid.
  • Estimated Cost to Fix: $20 - $200
  • Recalls: None Found

Summary

The 2006 Toyota Highlander, while generally reliable, does have some common issues to be aware of. Engine problems like oil leaks and consumption, along with transmission issues, can be costly to repair. Electrical problems such as door lock failure are also fairly common. Suspension issues mainly consist of strut and strut mount failure. Dashboard cracking is also prevalent and could be costly to repair. It is important to inspect the vehicle thoroughly and check its maintenance history before purchasing.