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2026 Lexus GX550

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2026 GX550.

Transmission Automatic (S10)

The 2026 Lexus GX550 is EPA-rated at 15/21/17 mpg city/highway/combined.

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

EPA fuel economy15/21/17 mpgEPA · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S10)

Ratings & economy EPA / vPIC

EPA city / highway / combined15 / 21 / 17 mpg
Drivetrain4-Wheel Drive
Recommended fuelPremium Gasoline

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific GX550. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Reference guides

Cross-vehicle references for the kinds of data on this page.

OBD-II trouble codesFluid capacities & specs

Frequently asked

What gas mileage does the GX550 get?

EPA figures are 15 city / 21 highway / 17 combined mpg.