FA20 Engine Review: Problems and Specs

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2.0L FA20 motor is a common venture of Subaru and Toyota (4U-GSE). FA20 was employed for Subaru BRZ coupe car while Toyota utilized 4U-GSE for Toyota 86 and Scion FR-S.

This motor is built on a framework of FB20. It features an absolutely restyled bottom. Fresh crankshaft, rods and pistons were employed. The motor has a square shape, having identical bore and stroke sizes and reaching 1:1 bore/stroke proportions. In comparison with FB20, the compression index is bigger and equals to 12.5:1. Intake and exhaust camshafts feature AVCS system.

Toyota contributed its direct fuel injection system D4S. Steel 4-2-1 exhaust manifold was utilized for the exhaust system. Besides, it is available in FA20D version, a 2.0L naturally aspirated non-turbo motor with an output of 200 hp at 7,000 rpm and a torque of 151 lb-ft.

FA20 engine specs

Manufacturer Gunma Oizumi Plant
Also called Subaru FA20
Production 2012-present
Cylinder block alloy Aluminum
Configuration Flat-4
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 86 (3.39)
Cylinder bore, mm (inch) 86 (3.39)
Compression ratio 10.6
Displacement 1998 cc (121.9 cu in)
Power output 147 kW (200 HP) at 7,000 rpm
186 kW (253 HP) at 5,600 rpm
200 kW (272 HP) at 5,600 rpm
221 kW (300 HP) at 5,600 rpm
Torque output 205 Nm (151 lb·ft) at 6,400-6,600 rpm
350 Nm (258 lb·ft) at 2,000-4,800 rpm
350 Nm (258 lb·ft) at 2,000-5,200 rpm
400 Nm (295 lb·ft) at 2,000-4,800 rpm
Redline 7,400 (N/A)
6,700 (Turbo)
HP per liter 100.1
Fuel type Gasoline
Weight, kg (lbs)
Fuel consumption, L/100 km (mpg)
Subaru BRZ
10.4 (22)
6.4 (37)
7.8 (30)
Turbocharger  Naturally aspirated
Garrett MGT2259S (FA20DIT)
Oil consumption, L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 600 miles)
Recommended engine oil 0W-20
5W-30 (FA20DIT)
5W-40 (FA20DIT)
Engine oil capacity, L (qt.) 6.3 (6.7)
5.1 (5.4)- FA20DIT
Oil change interval, km (miles) 5,000-10,000
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information

200,000+ (120,000)
Tuning, HP
-Max HP
-No life span loss

Engine Modifications

FA20DIT, FA20F and FA20E are turbo versions of FA20 used as alternatives to EJ205 and EJ207. These models have aluminum pistons with a lower compression index of 10.6:1, restyled heads, contributing to better airflow, and advanced combustion chambers.

Camshafts of these turbocharged motors have additional functions and contain a plastic intake manifold with tumbler generator valves. Twin Scroll turbocharger Garrett MGT2259S generates 1.1 bar pressure (1.5 bar in over-boost mode). Output is 272 hp at 5,600 rpm and a torque of 258 ft-lb.


  • 2017+ Subaru BRZ/Toyota GT86 (manual transmission)
  • 2012+ JDM Subaru Legacy 2.0GT DIT and 2014+ Subaru Levorg
  • 2014+ USDM Subaru Forester XT
  • 2014+ JDM Subaru Forester XT
  • 2015+ USDM Subaru WRX

FA20 Engine Problems and Reliability

  1. Rough idling. The most possible reason is a malfunction of engine control unit software. It’s advised to get fresh software for the control unit.
  2. Motor stops to function. You need to examine cam gear. Its improper functioning decreases the pressure of engine oil.

To increase the durability and efficiency of the FA20 motor, it’s necessary to use only high-quality fuel as it influences the engine’s lifespan. Besides, it’s advisable to buy only good quality engine oil and change it more often than Subaru recommends.

Last update on 2021-10-16 / Affiliate links / Images from Amazon Product Advertising API

Dan Hoffman

Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime.

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