2012 Lexus RX450h

The 2012 Lexus RX 450h is a luxury hybrid SUV known for its smooth ride, comfortable interior, and excellent fuel economy. It’s powered by a 3.5-liter V6 engine paired with an electric motor, producing a combined 295 horsepower and 234 lb-ft of torque. It only came with an electronically controlled continuously variable transmission (ECVT). Owners generally appreciate the vehicle’s reliability, fuel efficiency, and quiet cabin. Common dislikes include the somewhat numb steering and limited cargo space compared to some competitors.

Electric Motor

3.5L V6 Hybrid (2GR-FXE) with Electric Motor

• Hybrid Battery Degradation/Failure
  • Description/Symptoms: Reduced fuel economy, decreased electric range, warning lights on the dashboard related to the hybrid system. In severe cases, the vehicle may not start or may experience a significant loss of power.
  • Solution: Replacement of the hybrid battery pack.
  • Estimated Cost to Fix: $3,000 - $8,000+
  • Recalls: None Found
• Inverter Failure
  • Description/Symptoms: The inverter converts DC power from the hybrid battery into AC power for the electric motor. Failure can result in loss of power, warning lights, and the vehicle potentially not starting or running.
  • Solution: Replacement of the inverter.
  • Estimated Cost to Fix: $2,000 - $5,000+
  • Recalls: None Found

Transmission

Electronically Controlled Continuously Variable Transmission (ECVT)

• Transmission Failure
  • Description/Symptoms: Slipping, hesitation, delayed engagement, rough shifting, and whining noises may present during the operation of the transmission.
  • Solution: Replacement of the transmission assembly
  • Estimated Cost to Fix: $3,500 - $6,000+
  • Recalls: None Found

Suspension

• Strut/Shock Absorber Failure
  • Description/Symptoms: Bumpy or bouncy ride, excessive body roll during cornering, clunking noises from the suspension, visible fluid leaks from the struts/shocks.
  • Solution: Replacement of the affected struts/shocks.
  • Estimated Cost to Fix: $300 - $1,000+ (per strut/shock)
  • Recalls: None Found

Electrical

• Navigation System Failure/Malfunction
  • Description/Symptoms: Freezing, slow response, inaccurate GPS location, complete system failure, or the screen going black.
  • Solution: Software update, or replacement of the navigation unit.
  • Estimated Cost to Fix: $200 - $2,000+
  • Recalls: None Found
• Power Door Lock Actuator Failure
  • Description/Symptoms: Door locks that don’t respond to the key fob or interior switch, intermittent locking/unlocking.
  • Solution: Replacement of the faulty door lock actuator.
  • Estimated Cost to Fix: $200-$500+ per door.
  • Recalls: None Found

Exterior

• Automatic Liftgate Failure
  • Description/Symptoms: Liftgate failing to open or close automatically, making grinding noises, or getting stuck.
  • Solution: Replacement of the liftgate motor, struts, or other associated components.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Interior

• Dashboard Cracking
  • Description/Symptoms: Cracking or warping of the dashboard, particularly in hot climates. This is a common cosmetic issue that may not affect functionality.
  • Solution: Replacement of the dashboard, or using a dashboard cover.
  • Estimated Cost to Fix: $1,500 - $3,000+ (dashboard replacement)
  • Recalls: None Found

Summary

The 2012 Lexus RX 450h is generally a reliable vehicle, but some specific issues can arise, particularly concerning the hybrid system (battery, inverter), and the ECVT. Repair costs can range from a few hundred dollars for suspension components or electrical issues to several thousand dollars for major repairs like hybrid battery replacement or transmission overhaul. While the RX450h does have issues, the Lexus brand’s reputation for reliability and build quality will mean that most of the problems can be addressed as they arise, however, due to high labor and replacement part costs, the repairs will be expensive.