What engine does Scion xB use?
The Scion xB was produced in two generations, each powered by a different engine. The first-generation xB used a 1.5-liter inline-four (Toyota 1NZ-FE), while the second-generation moved up to a 2.4-liter inline-four (Toyota 2AZ-FE).
Engine options by generation
The following list summarizes the engines that powered the Scion xB across its production life, including displacement, engine code, and approximate output.
- First generation (2004–2006): 1.5-liter inline-four, 1NZ-FE; around 108 horsepower and about 104 lb-ft of torque.
- Second generation (2007–2015): 2.4-liter inline-four, 2AZ-FE; around 158 horsepower and about 161 lb-ft of torque.
Concluding note: The two-generation engine progression reflects a shift from economical city driving to a more versatile, potentially stronger package while preserving a front-wheel-drive layout.
First-generation xB (2004–2006)
The first-generation xB relied on Toyota's 1NZ-FE 1.5-liter four-cylinder engine, a member of the NZ engine family used across several Toyota compact models. It delivered about 108 hp and roughly 104 lb-ft of torque, offering adequate power for urban use and highway merging in a compact, boxy design.
Second-generation xB (2007–2015)
The second-generation xB switched to a larger 2AZ-FE 2.4-liter four-cylinder, producing around 158 hp and 161 lb-ft of torque. This engine gave the xB noticeably stronger acceleration and highway capability, while remaining a practical, space-efficient hatchback.
Summary
In short, the Scion xB used two engines across its two generations: a 1.5-liter 1NZ-FE in the first-gen and a 2.4-liter 2AZ-FE in the second-gen. This evolution reflected Toyota’s broader design goals for a practical, compact vehicle with improved power and versatility.
