2023 Lexus NX450h+

The 2023 Lexus NX450h+ is a plug-in hybrid electric vehicle (PHEV) that offers a blend of luxury, efficiency, and performance. It features a 2.5-liter inline-4 engine paired with electric motors, producing a combined 304 horsepower. Other engine options for the 2023 NX include the NX 250 with a 2.5-liter inline-4 (203 hp), the NX 350 with a 2.4-liter turbocharged inline-4 (275 hp), and the NX 350h hybrid with a 2.5-liter inline-4 and electric motors (240 hp). The NX450h+ utilizes a continuously variable transmission (CVT). Owners generally appreciate the NX450h+’s fuel efficiency, quiet cabin, comfortable ride, and luxurious interior. Common complaints revolve around the infotainment system’s learning curve, the relatively small cargo space, and some find the acceleration in hybrid mode to be less responsive than expected.

Electric Motor

NX450h+

• High Voltage Coolant Heater Failure
  • Description/Symptoms: Some owners have reported the high voltage coolant heater failing. This may cause the vehicle to not heat properly in cold weather, and can cause the vehicle to stop driving while displaying a warning on the infotainment screen.
  • Solution: Replacement of the high voltage coolant heater.
  • Estimated Cost to Fix: $1,500 - $2,500+
  • Recalls: None Found

Charging System

NX450h+

• Slow Charging Speed
  • Description/Symptoms: Owners have mentioned that the NX450h+ charges slower than expected on Level 2 chargers. While it’s rated for 3.3 kW charging, some owners find that it often charges at a lower rate, extending the charging time.
  • Solution: While there is no fix to improve this, it is important to make sure there is no issue with the charging unit, or the vehicles onboard charging system. Replacing the onboard charging system may improve the charging time.
  • Estimated Cost to Fix: $800-$2,000+
  • Recalls: None Found

Electrical

NX450h+

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The infotainment system, which controls navigation, audio, climate, and other vehicle functions, is reported to freeze or crash intermittently, requiring a restart.
  • Solution: Software updates have been released to address these issues. Dealers can perform the update.
  • Estimated Cost to Fix: $0 (covered under warranty or software update)
  • Recalls: None Found

Interior

NX450h+

• Rattling/Creaking Noises
  • Description/Symptoms: Some owners have noted rattling or creaking noises emanating from the dashboard or door panels, particularly on rough roads.
  • Solution: Dealerships can attempt to isolate and address the source of the noise by tightening fasteners, applying felt tape, or replacing defective components.
  • Estimated Cost to Fix: $50 - $500+ (depending on the severity and location of the noise)
  • Recalls: None Found

Exterior

NX450h+

• Automatic Liftgate Malfunction
  • Description/Symptoms: The automatic liftgate may fail to open or close properly, or may stop mid-operation. This can be caused by a faulty sensor or motor.
  • Solution: Replacement of the faulty sensor or motor, or recalibration of the liftgate system.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary: The 2023 Lexus NX450h+ presents a mix of minor and potentially more concerning issues. The infotainment system glitches and interior noises appear to be the most common, but tend to be relatively inexpensive to resolve. The high voltage coolant heater failure can be the most expensive and dangerous. Potential buyers should be aware of these potential issues and thoroughly inspect the vehicle during purchase.