FA20DIT Engine for Sale | OEM Used Subaru FA20DIT 2.0 Liter Direct-Injection

Description

About the Subaru FA20DIT Boxer-4 Direct-Injection Turbo Engine

Looking for a replacement Subaru FA20DIT engine? Part Nests stocks OEM used Subaru FA20DIT 2.0L direct-injection turbocharged horizontally-opposed boxer-4 engines. The FA20DIT is Subaru’s modern 2.0L direct-injection turbo boxer-4 from the FA engine family (per our FA20 listing from covering the broader FA20 family). The FA20DIT succeeded the EJ255 (per our listing) in US-market WRX applications starting 2015 model year (VA generation), bringing direct injection technology and timing chain architecture to the WRX platform. With 268 HP in WRX trim and 250 HP in Forester XT trim, the FA20DIT represents modern Subaru turbo engineering with substantial advantages over the EJ255 predecessor.

Engine Overview: FA20DIT Architecture

• Displacement: 2.0 liters (1,998 cc)
• Configuration: Horizontally-opposed boxer-4 (180-degree opposed cylinders)
• Bore x Stroke: 86 mm x 86 mm (square design)
• Power Output: 268 HP at 5,600 RPM (US WRX), 250 HP at 5,600 RPM (Forester XT)
• Peak Torque: 258 lb-ft at 2,000-5,200 RPM (broad flat torque curve – characteristic of modern direct-injection turbo)
• Cylinder Head: Aluminum, DOHC with DUAL AVCS (intake and exhaust variable valve timing)
• Block: Aluminum (open-deck)
• Compression Ratio: 10.6:1 (much higher than EJ255 8.4:1, possible because direct injection prevents detonation)
• Fuel System: Direct injection with high-pressure direct injection (HPDI) fuel pump and injectors
• Turbocharger: Twin-scroll turbocharger (modern design with improved spool characteristics vs EJ255 single-scroll IHI VF-series)
• Intercooler: Top-mount intercooler (preserved Subaru WRX hood scoop tradition)
• Timing chain driven (NO scheduled timing belt service like EJ255 every 105,000 miles)
• Production: 2015 plus US WRX (VA generation sedan), 2014-2018 US Forester XT

FA20DIT vs EJ255 Predecessor: Modern Architecture Advantages

The FA20DIT (this listing) represents substantial modernization vs the predecessor EJ255 (per our listing) which served US WRX 2006-2014:

• Direct injection vs port fuel injection: FA20DIT uses direct injection (HPDI) with fuel sprayed directly into cylinder; EJ255 uses port fuel injection (PFI) with fuel sprayed into intake manifold. Direct injection enables higher compression (10.6:1 vs 8.4:1) and better fuel atomization.
• Timing chain vs belt: FA20DIT uses timing chain (no scheduled replacement); EJ255 uses timing belt requiring replacement every 105,000 miles. This represents $1,600-4,500 maintenance savings over vehicle life.
• Twin-scroll vs single-scroll turbo: FA20DIT twin-scroll turbo improves spool characteristics and reduces lag; EJ255 single-scroll IHI VF-series has more pronounced turbo lag
• Broader torque curve: FA20DIT 258 lb-ft from 2,000-5,200 RPM (broad flat curve); EJ255 226-258 lb-ft at 2,800-4,400 RPM (narrower peak). FA20DIT is more responsive in everyday driving.
• Compression ratio: FA20DIT 10.6:1 vs EJ255 8.4:1 – direct injection enables much higher compression while still allowing turbocharging
• Dual AVCS: FA20DIT has dual AVCS (intake and exhaust); EJ255 typically had AVCS on intake only
• Modern design: FA20DIT represents Subaru’s modern turbo engineering for the VA-generation WRX

FA20DIT vs FA20D (BRZ): Different Fuel Systems

The FA20DIT (this listing) shares the FA20 base architecture (per our FA20 listing) with the FA20D used in the Subaru BRZ / Toyota 86 / Scion FR-S, but with critical differences:

• FA20DIT (this listing, WRX / Forester XT turbo): Direct injection (HPDI) only – “DIT” stands for Direct Injection Turbo; turbocharged; 268 HP US WRX trim
• FA20D (BRZ / 86 / FR-S BRZ listing): Toyota D-4S dual injection system (BOTH direct AND port injection); naturally aspirated; 200 HP US trim
• Architecture similarity: Both share the FA family 2.0L boxer-4 base architecture (86 mm bore x 86 mm stroke square design)
• Application difference: FA20DIT for WRX / Forester XT turbo applications; FA20D for BRZ / 86 NA sport coupe applications
• Why D-4S in BRZ: The BRZ NA application uses Toyota’s D-4S dual injection to reduce carbon buildup at part-throttle conditions; the FA20DIT turbo application uses direct injection only

FA20DIT Applications

• Subaru WRX (US market 2015 plus, VA generation sedan): Primary FA20DIT application; replaced EJ255 in US WRX starting 2015 model year
• Subaru Forester XT (US market 2014-2018): Turbo Forester application with FA20DIT producing 250 HP (slightly different tune than WRX)
• Some markets retained EJ255 longer: US WRX transitioned to FA20DIT in 2015 but some markets retained EJ255 in WRX-equivalent variants longer
• STI continued with EJ257: The WRX STI continued with the EJ257 (per our listing) through 2021 in US market; only the WRX (not STI) transitioned to FA20DIT
• Forester XT discontinued: The Forester XT was discontinued after 2018; the 2019 plus Forester eliminated the XT turbo trim

Common FA20DIT Failure Modes

• Carbon buildup on intake valves: Direct-injection engines have inherent intake valve carbon buildup pattern (since no port-injection fuel washing); requires walnut shell blasting service every 60,000-100,000 miles
• HPDI high-pressure fuel pump failure: Mechanical HPDI fuel pump can fail; expensive to replace
• Direct injector clogging: Injectors can clog at very high mileage; service with periodic injector cleaning
• Knock sensor failure: Common cause of check engine codes
• Carbon contamination in turbo: Direct-injection carbon contamination can affect turbocharger over time
• Engine oil consumption (some early FA20DIT examples): Some early FA20DIT examples exhibited elevated oil consumption (similar to early FB25 oil consumption pattern); Subaru service campaigns addressed affected VINs
• Timing chain wear: Rare but possible at very high mileage; chain is generally robust

Subaru Boxer Engine Family Context

The Subaru FA20DIT (this listing) is the modern FA family 2.0L direct-injection turbo engine. For broader Subaru boxer engine context across our catalog and prior batches, the Subaru FA20 engine (our listing) covers the broader FA20 family with both FA20D NA and FA20DIT turbo variants. The Subaru EJ255 engine (our listing) is the EJ family 2.5L turbo predecessor that FA20DIT replaced in 2015 US WRX. The Subaru EJ205 engine (our listing) is the EJ family 2.0L turbo for early US WRX (2002-2005); the FA20DIT represents the modern 2.0L turbo evolution from the EJ205 era through EJ255 era to FA20DIT era. The Subaru EJ257 engine (our listing) is the STI Turbo variant that continued with EJ family through 2021 (STI did NOT transition to FA20DIT). The Subaru BRZ engine (our listing) uses the FA20D NA variant of the FA family. The Subaru WRX engines (our listing) provides WRX engine overview context. The Subaru FB25 engine (our listing) is the modern FB family NA successor to EJ25 family in mainstream 2.5L applications. The FA20DIT represents the modern WRX engine from 2015 plus.

Vehicle Compatibility

FA20DIT Architecture Specifications

Common Failure Modes and Maintenance Reference

Why Buy From Part Nests

• Engine verified as Subaru FA20DIT (modern FA family 2.0L direct-injection turbo succeeding EJ255 in US WRX)
• Year confirmed (FA20DIT US production approximately 2015 plus for WRX VA generation, 2014-2018 for Forester XT)
• Application confirmed (Subaru WRX 2015 plus VA generation sedan, Forester XT 2014-2018)
• Horsepower rating documented (268 HP at 5,600 RPM US WRX, 250 HP at 5,600 RPM Forester XT)
• Compression and leak-down tested all 4 cylinders
• Both cylinder heads condition documented (DOHC dual AVCS)
• Direct injection HPDI fuel pump and injector condition documented
• Turbocharger condition assessed (twin-scroll modern design)
• Timing chain condition assessed (FA family uses chain NOT belt)
• Free shipping to all 50 states via heavy freight
• 15 day replacement warranty on internal defects
• Subaru-experienced support team familiar with FA20DIT / FA20D / EJ255 distinctions and WRX applications
• Call (855) 634-4447 to verify the right part for your vehicle before ordering.