Toyota 4GR

Toyota 4GR-FSE Engine

  1. Specifications
  2. Overview, problems
  3. Performance tuning

Toyota 4GR engine specs

Manufacturer Toyota Motor Manufacturing Kentucky
Also called Toyota 4GR
Production 2003-present
Cylinder block alloy Aluminum
Configuration V6
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 77 (3.03)
Cylinder bore, mm (inch) 83 (3.27)
Compression ratio 12.0
Displacement 2499 cc (152.5 cu in)
Power output 152 kW (207 HP) at 6,400 rpm
158 kW (215 HP) at 6,400 rpm
Torque output 250 Nm (184 lb·ft) at 3,800 rpm
260 Nm (192 lb·ft) at 3,800 rpm
HP per liter 82.8
Fuel type Gasoline
Weight, kg (lbs)
Fuel consumption, L/100 km (mpg)

for Lexus IS250
12.7 (18)
7.0 (33)

9.1 (26)
Turbocharger  Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 750 miles)
Recommended engine oil 0W-30
Engine oil capacity, L (qt.) 6.3 (6.6)
Oil change interval, km (miles) 5,000-10,000
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information

300,000+ (180,000)
Tuning, HP
-Max HP
-No life span loss


The engine is installed in Toyota Crown
Lexus IS250
Lexus GS250
Toyota Mark X

Toyota 4GR-FSE engine reliability, problems and repair

In 2003, Toyota GR series has been complemented by a new 2.5 liter 4GR engine. It has replaced the famous 1JZ-GE engine. This engine is the 3GR-FSE with a smaller capacity. The aluminum 60° V6 3GR engine block was complemented by forged crankshaft with a 77 mm stroke. The cylinders diameter has been reduced to 83 mm; the new pistons have been installed. As a result, V6 displacement has decreased from 3 to 2.5 liters.
4GR-FSE cylinder heads are the same as in the 3GR-FSE. They are DOHC heads equipped with variable valve timing system (Dual-VVTi) on intake and exhaust camshafts. This system works just like in 3GR. 4GR uses the same camshafts as 3GR. The intake system uses variable length intake manifold ACIS. This engine features direct fuel injection system, it may be recognized by FSE designation. The firing order for the 4GR-FSE engines is 1-2-3-4-5-6.
This engine was designed for Lexus vehicles with an index of 250, as well as for some Toyota models.
Together with 4GR, Toyota GR series included the following engines: 1GR, 2GR, 3GR, 5GR, and 6GR.

Toyota 4GR engine problems and malfunctions

Reliability of the 4GR is similar to other engines of GR series, such as 3GR, and 2GR. HERE you may read about its basic and common problems.

Toyota 4GR engine tuning

4GR Supercharger

This 2.5 liter 4GR engine has been designed for a leisurely drive; it is not intended to be a base for something powerful and fast.
Buy 1JZ-GTE, it is extraordinary good for fast driving. You can buy a cold air intake and aftermarket exhaust system;this will give some extra horsepower.
Do not buy aggressive cams, aftermarket intake manifold, and other performance parts for the high rev naturally aspirated 4GR construction, it is not reasonable.
The only reasonable way to increase the 4GR-FSE power is to buy a supercharger kit. These kits are manufactured by the ARMA Company. You may install it on the stock internals. Maximum boost pressure is 7 psi (0.5 bar). As a result, you will get about 310 HP and a torque of 380 N.m. Construction of something more powerful or 4GR-FSE turbo does not make sense, it is unreasonably expensive. You are better to buy a simply more powerful car.