Loading

Are RX400h reliable?

The Lexus RX400h, a hybrid SUV model, is generally considered a reliable vehicle. According to industry data and owner reviews, the RX400h has demonstrated above-average reliability compared to other luxury SUVs in its class. However, as with any vehicle, there are some potential issues to be aware of.


Reliability of the Lexus RX400h


The Lexus RX400h, which was produced from 2005 to 2009, has earned a reputation for being a reliable and durable hybrid SUV. Lexus, Toyota's luxury division, is known for its commitment to quality and reliability, and this is reflected in the RX400h's performance. According to data from sources like J.D. Power and Consumer Reports, the RX400h has scored well above average in terms of predicted reliability and owner satisfaction.


One of the key factors contributing to the RX400h's reliability is its hybrid powertrain. The hybrid system, which combines a gasoline engine with an electric motor, is generally considered to be more reliable than a traditional internal combustion engine. The electric components in the hybrid system, such as the battery pack and electric motor, are designed to be durable and long-lasting.


Potential Issues with the RX400h


While the RX400h is generally a reliable vehicle, there are a few potential issues that owners should be aware of:



  • Battery pack degradation: Over time, the hybrid battery pack can degrade, reducing the vehicle's electric-only range and fuel efficiency. Proper maintenance and replacement of the battery pack can help mitigate this issue.

  • Transmission problems: Some owners have reported issues with the RX400h's continuously variable transmission (CVT), which can be prone to premature wear and failure. Regular maintenance and monitoring of the transmission is recommended.

  • Electrical system glitches: Occasionally, owners have reported minor electrical issues, such as problems with the infotainment system or other electronic components. These issues are generally not widespread and can often be resolved through software updates or minor repairs.


Overall, the Lexus RX400h is considered a reliable and durable hybrid SUV, with a reputation for quality and longevity that is typical of the Lexus brand. While no vehicle is perfect, the RX400h's hybrid powertrain and Lexus' commitment to reliability make it a solid choice for those seeking a reliable and fuel-efficient luxury SUV.

How reliable is the Lexus RX 400h?


Now in 2023 it has 174,000 miles. It still runs like new, handles well, and is very comfortable. I have done maintenance and just did the Timing belt, spark plugs, and CVT fluid change. Toyota replaced the inverter under a recall so no issues there.



How long can a Lexus RX hybrid last?


250,000 miles
When properly cared for and driven, the Lexus RX can last for 250,000 miles or more. This longevity is thanks to the following: Performance: The Lexus RX has three engines from which to choose, all of which are highly dependable.



How much does it cost to replace a battery in a Lexus RX hybrid?


$2,000 to $8,000
While your typical auto battery costs around $100 to $200, a hybrid battery costs significantly more. In fact, hybrid battery replacement costs can vary anywhere from $2,000 to $8,000.



Can hybrid battery last 20 years?


As we mentioned, the battery life for most hybrid vehicles is around 10 to 20 years, if not longer. With proper maintenance, you can ensure that your hybrid is ready for any Westfield drive for thousands of miles.



What year of Lexus is most reliable?


According to various sources, the most reliable Lexus IS years include:

  • 2014 Lexus IS 300.
  • 2018 Lexus IS 350.
  • 2019 Lexus IS 350.
  • 2012 Lexus IS 250.
  • 2011 Lexus IS 250.



How many miles does a Lexus hybrid battery last?


150,000 miles
When to Do Hybrid Battery Replacement. Under normal driving conditions around Town 'N' Country or beyond, your car will require a hybrid car battery replacement approximately every 150,000 miles or after 15 years, whichever happens first.



Does Lexus RX 400h require premium gas?


You can put premium gas in your Lexus RX, and it can provide better performance, but it's not a requirement. Any gas that's put in your Lexus RX shouldn't be higher than 15% ethanol.



What is the most common problem with the Lexus RX400h?


Lexus RX400h Common Problems and Solutions

  • Rear seat rattle. Problem: Have you noticed a rattling noise coming from the rear seats?
  • Braking problems. Problem: There have been several reports of braking problems with the RX400h.
  • Leaking inverter. Problem: Have you noticed that the inverter is leaking on your RX400h?



How much does it cost to replace a battery in a Lexus RX400h?


The average cost for a Lexus RX400h Hybrid High Voltage Battery Replacement is between $6,462 and $6,531. Labor costs are estimated between $264 and $333 while parts are typically priced around $6,198. This range does not include taxes and fees, and does not factor in your unique location.



How long does a Lexus 400h hybrid battery last?


Under normal conditions, you can expect Lexus hybrid car batteries to last up to 150,000 miles or 15 years and sometimes even longer. Learn all about Lexus hybrid battery replacement costs and more today with Lexus of Cerritos!


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.