The Lexus 4GR — FSE is a 2,499 cc, naturally aspirated V6 petrol engine produced between 2005 and 2012. It features Toyota's D — 4S combined direct and port fuel injection system, dual VVT — i for intake and exhaust camshafts, and an aluminium block and heads. In standard form, it delivered approximately 153 kW (207 PS) and 252 Nm of torque, providing a smooth and linear power delivery characteristic of Lexus V6 engines.
Fitted primarily to the IS 250 (GSE20/25) and GS 250 (GRL10…
Production years 2005–2012 meet Euro 4 standards (EU Regulation (EC) No 715/2007).
The Lexus 4GR-FSE is a 2,499 cc V6 petrol engine engineered for mid-size luxury sedans (2005-2012). It combines D-4S dual injection with dual VVT-i variable valve timing to deliver smooth, linear power and refined operation. Designed to meet Euro 4 standards, it prioritizes drivability and quietness over ultimate economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,499 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 87.5 mm × 69.2 mm | |
Power output | 153 kW (207 PS) @ 6,400 rpm | |
Torque | 252 Nm @ 4,800 rpm | |
Fuel system | D-4S (Direct & Port Injection) | |
Emissions standard | Euro 4 | |
Compression ratio | 12.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 165 kg |
The Lexus 4GR-FSE was used across Lexus's GSE2x/GRL1x platforms with longitudinal mounting. This engine received platform-specific adaptations-tuned intake and exhaust for the GS 250 for a slightly different character-and no major facelift revisions affecting core compatibility within its production run. All applications are documented in OEM technical bulletins.
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The 4GR-FSE is generally robust, with its primary long-term consideration being intake valve carbon buildup. Toyota service data indicates this is a gradual process, rarely causing failure but potentially affecting drivability after 150,000 km. Extended oil change intervals or low-quality fuel can accelerate this, making adherence to maintenance schedules critical.
Analysis derived from Toyota technical bulletins (2005-2012) and EU type-approval documentation. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the 4GR-FSE is renowned for its durability and smooth operation. Its main long-term consideration is potential carbon buildup on intake valves, which is manageable with periodic cleaning. With regular maintenance using quality oil, these engines routinely exceed 200,000 km without major issues.
The most common issue is gradual carbon buildup on intake valves. Other potential concerns include minor oil consumption at very high mileage, VVT-i solenoid sticking, and coolant thermostat failure. These are generally not catastrophic and are well-documented in Toyota service information.
The 4GR-FSE was used exclusively in the Lexus IS 250 (GSE20/GSE25 chassis) and the Lexus GS 250 (GRL10/GRL15 chassis) from their introduction in 2005 until approximately 2012, across all global markets for these models.
Yes, but gains are modest due to its naturally aspirated design. ECU remaps can yield small increases. More significant power requires forced induction (turbo/supercharger kits), which is complex and costly. Most owners value its smooth, reliable nature over tuning potential.
Fuel economy is moderate. Expect around 11.5-13.0 L/100km (20-24 mpg UK) in combined city/highway driving for an IS 250. The GS 250, being larger, may be slightly thirstier. Real-world figures depend heavily on driving style.
Yes. The 4GR-FSE is an interference engine. If the timing chain were to fail (which is extremely rare), it could result in piston-to-valve contact and severe engine damage. However, the chain is designed to last the engine's lifetime.
Toyota recommends 5W-30 viscosity oil meeting ILSAC GF-4 or later/API SM or later specifications. Using a high-quality, low-ash synthetic oil is beneficial for reducing carbon buildup and protecting engine components over the long term.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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