It was also tested for over 1.67 million miles before it entered production to meet Toyota's stringent reliability standards. The 1UZ-FE was lightweight but also very sturdy and durable.

Toyota designed the 1UZFE for use in luxury ... Although it still used a UZ-family engine, it upgraded its 4.0-liter 1UZ-FE for a 4.3-liter 3UZ-FE mill. Lexus' tagline, Relentless Pursuit ...