No. The Lexus GS400 does not use a 2JZ engine. It is powered by a 4.0-liter V8 called the 1UZ-FE.
The question matters for enthusiasts tracing engine lineage and model history. While the 2JZ family—best known for its inline-six layout and turbocharged GTE variants—defines performance for some Toyota and Lexus models, the GS400 belongs to a different engine lineage and era. This article breaks down the GS400’s powerplant and how it differs from the 2JZ family.
Engine powering the GS400
The GS400, produced in the late 1990s, relies on Toyota-Lexus's 1UZ-FE 4.0-liter V8. This engine is part of Lexus' UZ family and is noted for smooth power delivery and refined performance in front-line luxury sedans of the period. It does not share the inline-six configuration or turbocharged variants that define the 2JZ family.
Where the 2JZ engine family appears
The 2JZ engines are Toyota and Lexus' famous inline-six family. The most widely recognized variants are the 2JZ-GE (naturally aspirated) and the 2JZ-GTE (turbocharged). They power a range of performance models, most notably the Toyota Supra and the Lexus IS300. They are not used in the GS400.
Two commonly cited 2JZ-powered models include:
- IS300 (2JZ-GE) — a popular sport-locused Lexus sedan known for its tunability
- Toyota Supra (2JZ-GTE) — the iconic turbocharged sports car
These examples illustrate how the 2JZ family sits in other Toyota/Lexus vehicles, separate from the GS400’s 1UZ-FE engine.
Summary
The GS400 does not have a 2JZ. It uses the 1UZ-FE 4.0L V8. The 2JZ inline-six family appears in other models such as the IS300 and Supra, but not in the GS400.