The Lexus 3UZ-FE is a 4,293 cc, all-aluminium V8 petrol engine produced between 2000 and 2012. It features dual overhead camshafts (DOHC), 32 valves, and Toyota's VVT-i variable valve timing on the intake camshafts. This architecture delivers smooth, linear power delivery for effortless cruising and refined performance.
Fitted to flagship models like the LS 430, SC 430, and GS 430, the 3UZ-FE was engineered for supreme refinement, quiet operation, and robust reliability. Emissions compliance was achieved through precise electronic fuel injection and catalytic converters, meeting Euro 3 and later Euro 4 standards depending on the model year and market.
One documented engineering focus was eliminating timing belt failures. As highlighted in Toyota Service Bulletin EG-001-03, the 3UZ-FE uses a durable, maintenance-free timing chain. This design choice significantly enhanced long-term reliability compared to its belt-driven predecessors, contributing to the engine's legendary durability.
Production years 2000–2005 generally meet Euro 3 standards; 2006–2012 models typically comply with Euro 4 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Lexus 3UZ-FE is a 4,293 cc V8 petrol engine engineered for luxury sedans and coupes (2000-2012). It combines DOHC 32-valve architecture with VVT-i variable valve timing to deliver smooth, linear power and exceptional refinement. Designed to meet Euro 3 and Euro 4 standards, it prioritizes quiet operation and long-term durability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,293 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 90.0 mm × 84.0 mm | |
| Power output | 206–239 kW (280–325 PS) | |
| Torque | 412–441 Nm @ 3,400–4,400 rpm | |
| Fuel system | Sequential multi-port fuel injection (SFI) | |
| Emissions standard | Euro 3 / Euro 4 (depending on year/market) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven (maintenance-free) | |
| Oil type | API SL/SM, ILSAC GF-3/GF-4 (e.g., 5W-30) | |
| Dry weight | 205 kg |
The 3UZ-FE's naturally aspirated V8 provides effortless, linear power ideal for relaxed highway cruising but benefits from premium fuel for optimal performance and emissions. Its timing chain is designed for the engine's life, eliminating a major maintenance item. Regular oil changes with high-quality synthetic oil (5W-30) are critical to protect the VVT-i system and maintain hydraulic lifter quietness. The engine's robust design means common issues are often ancillary (e.g., coolant elbows, sensors) rather than core mechanical failures. Its legendary reliability is contingent on consistent, high-quality maintenance.
Oil Specs: Requires API SL/SM or ILSAC GF-3/GF-4 specification oil (e.g., 5W-30) (Toyota Owner's Manual).
Emissions: Euro 3 certification applies to early models (2000-2005); Euro 4 for later models (2006-2012) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Peak output varies by application and model year (Toyota Group PT-2008).
Toyota Technical Information System (TIS): Docs ENG-0452, SIB EG-001-03
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Lexus 3UZ-FE was used across Toyota's flagship UZ platform with longitudinal mounting and was exclusive to Lexus in most markets. This engine received minor platform-specific adaptations-unique intake manifolds and ECU calibrations for different models-and from 2003 the LS 430 facelift introduced revised VVT-i mapping, though core components remained interchangeable. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side cylinder block, just below the exhaust manifold (Toyota TIS ENG-0452). The 8th VIN digit typically indicates engine type ('U' for 3UZ-FE in Lexus applications). Visually, it features a large, smooth black plastic intake manifold covering the valley and prominent 'V8 4.3L' badges on the cam covers. Critical differentiation from 1UZ/2UZ: The 3UZ has a larger displacement (4.3L vs 4.0L) and VVT-i on the intake cams, identifiable by the oil control valve solenoid on the front timing cover. Service parts are generally interchangeable across model years, but ECU software and some sensors may vary.
The 3UZ-FE's primary reliability strength is its maintenance-free timing chain, a significant upgrade over belt-driven predecessors. Toyota's internal durability reports indicate a very low incidence of major mechanical failure, while common owner-reported issues typically involve ancillary components like coolant elbows or sensors. Consistent use of high-quality oil and coolant is critical to preserve the VVT-i system and prevent corrosion in the aluminum block.
Analysis derived from Toyota technical bulletins (2000-2012) and aggregated owner-reported data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LEXUS 3UZ-FE.
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Regulation (EC) No 715/2007
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