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What is the fuel capacity of the Lexus NX hybrid?

The Lexus NX hybrid has a fuel tank capacity of about 14.8 gallons (56 liters).


This article explains the official capacity across the NX350h and NX450h+ hybrids, notes any regional variations, and shows how you can confirm the exact figure for your specific vehicle.


Official capacity across the NX hybrid lineup


The published capacity for the NX hybrid family is commonly listed at 14.8 gallons (56 liters) in recent model years for both the hybrid and plug-in hybrid variants. Exact figures can vary slightly by market and year, so it’s wise to verify with official sources for your region.



  • NX 350h (gasoline-electric hybrid): 14.8 gallons (56 liters)

  • NX 450h+ (plug-in hybrid): 14.8 gallons (56 liters)


In practice, Lexus and many reviews point to a shared tank size for these variants, providing a similar refill interval and driving range under typical conditions. Always check the specific vehicle data plate or owner's manual for your exact configuration.


Why fuel capacity matters for the NX Hybrid


Fuel capacity directly affects how far you can travel between fill-ups, which in turn influences driving habits, refueling planning, and overall convenience. With the NX hybrid’s emphasis on efficiency, a roughly 14.8-gallon tank strikes a balance between range and the vehicle’s compact dimensions.


How to verify your exact capacity


To confirm your vehicle’s precise tank size, use these official sources and checks:



  1. Consult the owner’s manual for the official specification.

  2. Check the window sticker (the vehicle’s VIN plate on the door jamb) for tank size details.

  3. Review Lexus’s official model-year spec sheets for your region or market.

  4. Contact your local Lexus dealer if you need VIN-specific confirmation.


By using these sources, you’ll get the exact capacity for your NX hybrid, which can be especially important for plug-in variants or regional packaging differences.


Summary


Across recent NX hybrid models, the fuel tank capacity is generally listed as 14.8 gallons (56 liters), applicable to both the NX350h and NX450h+ in many markets. Exact capacity can vary by year and region, so verify with official documentation or your dealer for your specific vehicle. This capacity supports practical range while maintaining the NX’s efficient, compact design.

What is the range of the Lexus NX350h full tank?


The mild-hybrid Lexus NX 350h can travel a total of 566 miles on a full tank of gas and juice from the mild-hybrid battery. The plug-in hybrid Lexus NX 450h+ and Lexus NX 450h+ F SPORT Handling AWD can travel 37 miles6 using electric-only power.



What is the range of the Lexus NX 350h hybrid?


The Lexus NX 350h has a total driving range of approximately 566 miles on a full tank, based on its combined EPA-estimated fuel economy of 39 MPG and a 14.5-gallon fuel tank. Real-world range can vary based on driving conditions and style. 

  • Total Range: Around 566 miles.
  • Fuel Tank Capacity: 14.5 gallons.
  • Combined Fuel Economy: 39 MPG (EPA estimate).
  • City Fuel Economy: 41 MPG (EPA estimate).
  • Highway Fuel Economy: 37 MPG (EPA estimate).
  • Note: The range can fluctuate based on factors like driving habits, terrain, and whether the car is driven in city or highway conditions.



How big is the gas tank on a Lexus NX hybrid?


The Lexus NX hybrid has a gas tank size of 14.5 gallons across all models, including the NX 350h and the 450h+ plug-in hybrid. This capacity is consistent with the gas-only versions and is designed to offer a good balance of fuel efficiency and driving range. 

  • Consistent size: The 14.5-gallon tank is standard for all powertrain options, including the hybrid and plug-in hybrid models.
  • Driving range: The total driving range varies depending on the specific model's fuel economy, but the capacity is the same for all. For example, the NX 350h has an estimated range of up to 590 miles under ideal conditions.



What is the difference between Lexus NX 350h and 450h?


The main difference is that the Lexus NX 450h+ is a plug-in hybrid with more power (304 hp) and an electric-only range of about 37 miles, while the NX 350h is a traditional hybrid with less power (239 hp) but better overall fuel efficiency (39 mpg) and no need to plug in. The 450h+ is more expensive, has a larger battery, and offers features like exclusive 20-inch wheels and a unique grille design. The 350h is more affordable and has a longer driving range when not accounting for the electric charge.
 
This video compares the Lexus NX 350h and 450h+: 1mCar Help CornerYouTube · Mar 20, 2022
Lexus NX 350h

  • Powertrain: Traditional hybrid
  • Horsepower: 239 hp
  • Fuel Economy: 39 mpg combined
  • Range: 537 miles on a full tank
  • Price: Starts at a lower price point 

Lexus NX 450h+
  • Powertrain: Plug-in hybrid (PHEV)
  • Horsepower: 304 hp
  • Fuel Economy: 84 MPGe combined (electric + gas)
  • Range: ~37 miles of electric-only range, after which it operates as a regular hybrid
  • Price: Starts at a higher price point
  • Features: Includes features not available on the 350h, such as larger battery, standard all-wheel drive, and specific design elements 

This video explains the differences between the Lexus NX 350h and 450h+: 57sThe Novak ReportYouTube · Jul 16, 2022
Which one should you choose?
  • Choose the NX 350h if: You want better overall fuel efficiency without the need to plug in, a longer driving range on gasoline alone, and a lower initial purchase price. 
  • Choose the NX 450h+ if: You want more power, the ability to drive on electric-only power for short trips (like commuting), and you can charge it regularly. This is a good option if you have access to charging at home or work, and you're willing to pay a premium for the plug-in technology. 


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.