TOYOTA 3UZ-FE 4.3L Engine

Toyota 3UZ-FE 4.3L Engine

The Toyota 3UZ-FE  4.3L Engine (4293 cc) V8 petrol engine developed for performance, refinement, and reliability. It’s part of Toyota’s renowned UZ engine family, succeeding the 1UZ and 2UZ series, and is widely known for powering high-end models such as the Lexus LS430, GS430, SC430, and Toyota Crown Majesta.

The engine features a 90° aluminum alloy V8 block with DOHC (Dual Overhead Camshafts) and 32 valves (4 per cylinder), coupled with VVT-i (Variable Valve Timing with intelligence) for improved efficiency and torque delivery.

Specifications & Overview

The Toyota 3UZ-FE  4.3L Engine (4293 cc) V8 petrol engine renowned for its refined power, smooth operation, and long-term reliability. Built with a 90-degree V8 aluminum block, this engine features DOHC (Dual Overhead Camshafts) and 32 valves, delivering excellent airflow and efficiency.

With a bore and stroke of 91.0 mm × 82.5 mm and a compression ratio of 10.5:1, the 3UZ-FE produces approximately 290 horsepower (216 kW) at 5,600 rpm and 441 Nm of torque at 3,500 rpm. It uses a sequential multi-point electronic fuel injection system and runs best on unleaded petrol (95 RON recommended). Designed for smooth yet strong performance, this engine maintains optimal temperatures through a liquid-cooled system with an electric fan and has an oil capacity of about 6.3 litres using SAE 5W-30.

Weighing around 220 kilograms (dry), the Toyota 3UZ-FE combines lightweight construction with robust power output, making it a top choice for models like the Lexus LS430, GS430, and Toyota Crown Majesta.

The 3UZ-FE is praised for its smooth power delivery, quiet operation, and long-lasting reliability, making it a favorite among tuners and engine importers. With an aluminum block and forged steel crankshaft, it achieves a strong balance between lightweight design and durability.

Common Maintenance Notes

Regular oil and filter changes are crucial to prevent VVT-i wear and oil sludge buildup. Timing belt replacement is recommended every 100,000 km, and using high-quality fuel ensures clean combustion and consistent performance. When properly maintained, the 3UZ-FE can easily exceed 400,000 km of reliable operation.

Every engine we sell is carefully tested and inspected prior to listing to ensure top quality.
This unit has no visible cracks or damage on the head or block and comes hand-picked from a clean, running vehicle in Japan, showing a verified mileage of around 50,000–80,000 miles.