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2007 Lexus RX400h

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By Research the Car 4 min read

The 2007 Lexus RX400h is a hybrid luxury crossover SUV that combines a gasoline engine with an electric motor to deliver both fuel efficiency and performance. It features a 3.3-liter V6 engine paired with a hybrid system, producing a combined 268 horsepower. There are no other engine or transmission options available for this vehicle. Owners often praise the RX400h for its comfortable ride, quiet cabin, and fuel economy. Common complaints include the higher cost of maintenance due to the hybrid system and the potential for battery degradation over time.

Hybrid System

3.3L V6 Hybrid System

  • Hybrid Battery Failure
    • Description/Symptoms: The hybrid battery, which stores energy for the electric motor, can degrade over time, leading to reduced fuel economy, decreased acceleration, and the “Check Hybrid System” warning light illuminating on the dashboard.
    • Solution: Replacement of the hybrid battery pack.
    • Estimated Cost to Fix: $2,000 - $6,000+
    • Recalls: None Found
  • Inverter Failure
    • Description/Symptoms: The inverter converts DC electricity from the battery to AC for the electric motor. Failure can result in a loss of power, the “Check Hybrid System” warning, and potentially the vehicle entering limp mode.
    • Solution: Replacement of the inverter.
    • Estimated Cost to Fix: $3,000 - $5,000
    • Recalls: None Found
  • Water Pump Failure
    • Description/Symptoms: Some models experience the water pump in the hybrid system failing, causing the hybrid system to overheat and shut down.
    • Solution: Replacement of the water pump.
    • Estimated Cost to Fix: $500 - $800
    • Recalls: None Found

Engine

3.3L 3MZ-FE V6

  • Oil Leaks
    • Description/Symptoms: Oil leaks can occur from various locations, including the valve cover gaskets and the oil pan gasket. This can lead to oil consumption, a burning smell, and potentially low oil levels causing engine damage.
    • Solution: Replacing the leaking gaskets or seals.
    • Estimated Cost to Fix: $200 - $800+ (depending on the location of the leak)
    • Recalls: None Found
  • VVTi System Issues
    • Description/Symptoms: Variable Valve Timing Intelligent (VVTi) system malfunctions can cause rough idling, decreased fuel economy, and a check engine light.
    • Solution: Diagnosis and repair of the VVTi system, which may involve replacing the VVTi actuator, solenoid, or performing an oil change.
    • Estimated Cost to Fix: $300 - $1,000+
    • Recalls: None Found

Transmission

ECVT

  • Transmission Slipping/Jerking
    • Description/Symptoms: The electronic continuously variable transmission (ECVT) can sometimes exhibit slipping or jerking during acceleration or deceleration. This can be due to internal wear and tear or issues with the transmission control module (TCM).
    • Solution: Transmission fluid change (initially), followed by inspection and potential repair or replacement of the ECVT if the fluid change doesn’t resolve the issue.
    • Estimated Cost to Fix: $150 - $500 (fluid change), $3,000 - $6,000+ (transmission replacement)
    • Recalls: None Found

Suspension

  • Air Suspension Issues (If Equipped)
    • Description/Symptoms: If the vehicle is equipped with air suspension, the air struts can leak over time, causing the vehicle to sag or ride unevenly. The air compressor may also fail.
    • Solution: Replacement of leaking air struts or the air compressor.
    • Estimated Cost to Fix: $500 - $1,500+ per strut, $500 - $1,000+ for the compressor.
    • Recalls: None Found
  • Strut and Shock Absorber Wear
    • Description/Symptoms: Standard struts and shock absorbers can wear out over time, leading to a bouncy or uncomfortable ride.
    • Solution: Replacement of the worn struts and shocks.
    • Estimated Cost to Fix: $400-$800 per axle
    • Recalls: None Found

Electrical

  • Navigation Screen Failure
    • Description/Symptoms: The navigation screen can fail or become unresponsive over time.
    • Solution: Replacement or repair of the navigation screen.
    • Estimated Cost to Fix: $300 - $1,000+
    • Recalls: None Found
  • Power Door Lock Actuator Failure
    • Description/Symptoms: The power door locks may stop working intermittently or fail completely due to a faulty door lock actuator.
    • Solution: Replacement of the faulty door lock actuator.
    • Estimated Cost to Fix: $200 - $400 per door
    • Recalls: None Found
  • HID Headlight Issues
    • Description/Symptoms: HID (High-Intensity Discharge) headlights may flicker, dim, or fail due to bulb failure or a faulty ballast.
    • Solution: Replacement of the HID bulbs or ballast.
    • Estimated Cost to Fix: $100-$400
    • Recalls: None Found

Exterior

  • Rear Hatch Lift Support Failure
    • Description/Symptoms: The rear hatch lift supports can weaken, causing the hatch to fall down unexpectedly.
    • Solution: Replacement of the lift supports.
    • Estimated Cost to Fix: $50 - $200
    • Recalls: None Found

Interior

  • Sunroof Issues
    • Description/Symptoms: The sunroof may become stuck or fail to open or close properly due to a malfunctioning motor or damaged tracks.
    • Solution: Repair or replacement of the sunroof motor or tracks.
    • Estimated Cost to Fix: $200 - $800+
    • Recalls: None Found

Summary

The 2007 Lexus RX400h, while generally reliable, does have some common issues, particularly related to its hybrid system, engine, and electrical components. The hybrid battery and inverter are potential high-cost repairs. Other issues, such as oil leaks and suspension wear, are more typical for vehicles of this age. Overall, potential buyers should be aware of the higher maintenance costs associated with the hybrid system and factor those into their purchasing decision. The severity of these issues can range from minor inconveniences to major mechanical failures, and the cost of repairs can vary widely.

Lexus, RX400h
Lexus RX400h 2007
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