2015 Lexus RX450h

The 2015 Lexus RX 450h is a luxury hybrid SUV known for its smooth ride, comfortable interior, and excellent fuel economy. It features a 3.5-liter V6 engine paired with an electric motor, producing a combined 295 horsepower and 247 lb-ft of torque. This model is available with only one transmission option: an electronically controlled continuously variable transmission (ECVT). Owners generally appreciate the vehicle’s reliability, quiet cabin, and luxurious features. However, some common dislikes include the somewhat detached driving experience, the infotainment system’s interface, and occasionally, the cost of hybrid-related repairs.

Electric Motor

• Electric Motor Failure
  • Description/Symptoms: The hybrid system may fail, resulting in a “Check Hybrid System” warning light on the dashboard. The vehicle may experience reduced power or be unable to start. In some cases, the electric motor itself can fail.
  • Solution: Replacement of the electric motor or hybrid system components.
  • Estimated Cost to Fix: $5,000 - $8,000+
  • Recalls: None Found

Transmission

• ECVT Failure
  • Description/Symptoms: The electronically controlled continuously variable transmission (ECVT) may fail, resulting in the vehicle being unable to start, loss of power, or unusual noises.
  • Solution: Replacement of the ECVT.
  • Estimated Cost to Fix: $4,000 - $6,000+
  • Recalls: None Found

Hybrid System

• Hybrid Battery Failure
  • Description/Symptoms: Reduced fuel economy, warning lights on the dashboard (e.g., “Check Hybrid System”), diminished electric motor assistance, and potentially the inability to start the vehicle.
  • Solution: Hybrid battery replacement.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found
• Inverter Failure
  • Description/Symptoms: The inverter controls the flow of power between the high-voltage battery and the electric motor. Symptoms of failure include a “Check Hybrid System” warning light, reduced power, and potential inability to start the vehicle.
  • Solution: Inverter replacement.
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found

Suspension

• Rear Suspension Noise
  • Description/Symptoms: Clunking or rattling noises from the rear suspension, particularly when driving over bumps.
  • Solution: Often requires replacement of rear stabilizer bar bushings or other worn suspension components.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Electrical

• Navigation/Infotainment System Issues
  • Description/Symptoms: Freezing, lagging, or complete failure of the navigation and infotainment system. Bluetooth connectivity issues.
  • Solution: Software updates may resolve some issues. In more severe cases, replacement of the head unit is required.
  • Estimated Cost to Fix: $100 (software update) - $2,000+ (replacement)
  • Recalls: None Found
• Backup Camera Failure
  • Description/Symptoms: The backup camera may fail to display an image, or the image may be distorted.
  • Solution: Replacement of the backup camera.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Interior

• Dashboard Cracking
  • Description/Symptoms: Cracking on the dashboard surface, especially in hot climates.
  • Solution: Replacement of the dashboard (expensive) or installation of a dashboard cover.
  • Estimated Cost to Fix: $1,500 - $3,000+ (replacement), $50 - $200+ (cover)
  • Recalls: None Found

Exterior

• Automatic Tailgate Issues
  • Description/Symptoms: The automatic tailgate may fail to open or close properly.
  • Solution: Replacement of the tailgate struts, motor, or sensors.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Summary: The 2015 Lexus RX 450h is generally a reliable vehicle, but owners should be aware of potential issues, particularly those related to the hybrid system. The most concerning and costly problems are the hybrid battery, inverter, or electric motor failures, and ECVT failure which can result in substantial repair bills. Other issues such as rear suspension noise, infotainment system glitches, and dashboard cracking are less severe but can still be frustrating. Pre-purchase inspections and service history reviews are highly recommended.