Subaru BRZ Engine for Sale | OEM Used Subaru BRZ FA20D Naturally-Aspirated 2.0

Description

About the Subaru BRZ FA20D Engine

Looking for a replacement Subaru BRZ engine? Part Nests stocks OEM used Subaru BRZ FA20D 2.0L naturally-aspirated horizontally-opposed boxer-4 engines. The FA20D is the BRZ-specific naturally-aspirated variant of the FA20 engine family (per our FA20 listing from covering the broader FA20 family). The FA20D was co-developed by Subaru and Toyota for the Subaru BRZ / Toyota 86 / Scion FR-S sport coupe platform, combining Subaru’s signature horizontally-opposed boxer architecture with Toyota’s D-4S dual injection technology. The result is a high-revving naturally-aspirated boxer engine producing 200 HP at 7,000 RPM with excellent power-to-weight characteristics ideal for the lightweight rear-wheel-drive sport coupe application.

Engine Overview: FA20D Architecture

• Displacement: 2.0 liters (1,998 cc)
• Configuration: Horizontally-opposed boxer-4 (180-degree opposed cylinders, Subaru signature design)
• Bore x Stroke: 86 mm x 86 mm (square design)
• Power Output: 200 HP at 7,000 RPM (US-market trim)
• Peak Torque: 151 lb-ft at 6,400-6,600 RPM (high-revving torque peak)
• Redline: Approximately 7,400 RPM (high-revving for a NA boxer)
• Cylinder Head: Aluminum, DOHC with dual AVCS (intake and exhaust)
• Block: Aluminum (open-deck design)
• Compression Ratio: 12.5:1 (high compression possible with D-4S dual injection)
• Fuel System: Toyota D-4S DUAL injection (BOTH direct injection AND port injection)
• Naturally aspirated: NO turbocharger (distinct from FA20DIT turbo
• Timing chain driven (NO scheduled timing belt service)
• Co-developed: Joint Subaru / Toyota project; Subaru manufactures the engine

Toyota D-4S Dual Injection System

The FA20D’s defining technical feature is the Toyota D-4S dual injection fuel system, which is distinct from both pure-port-injection EJ-family engines and pure-direct-injection FA20DIT:

• D-4S meaning: Toyota’s “Direct injection 4 stroke Superior” dual injection system
• Two fuel systems in one engine: Both direct injectors (spraying fuel directly into combustion chamber) AND port injectors (spraying fuel into intake manifold)
• Why two systems: Direct injection enables high compression ratio (12.5:1) for power; port injection prevents the intake valve carbon buildup pattern inherent to direct-injection-only engines
• System cooperation: ECU controls when to use direct injection, port injection, or both, based on engine load, RPM, temperature, and emissions requirements
• At low RPM / light load: Predominantly port injection (washing intake valves to prevent carbon buildup)
• At high RPM / heavy load: Predominantly direct injection (maximum power and efficient combustion)
• At cold start: Both systems may operate together for emissions
• Maintenance advantage: Eliminates the walnut shell blasting carbon cleaning requirement that direct-injection-only engines need every 60,000-100,000 miles

FA20D vs FA20DIT: Critical Distinction

The FA20D (this listing) and FA20DIT (per our listing) share the FA20 base architecture but are NOT interchangeable:

• FA20D (this listing, BRZ NA): Toyota D-4S DUAL injection (direct AND port), naturally aspirated, 200 HP US trim, 12.5:1 compression, 7,400 RPM redline, BRZ / 86 / FR-S sport coupe applications
• FA20DIT: Direct injection HPDI only (NO port injection), turbocharged, 268 HP US WRX trim, 10.6:1 compression, lower redline, WRX / Forester XT turbo applications
• Architecture shared: Same FA family base (86 mm x 86 mm bore x stroke, boxer-4, DOHC dual AVCS)
• Key differences: FA20D has port injectors that FA20DIT lacks; FA20DIT has turbocharger that FA20D lacks; ECU calibration is substantially different; fuel system pressure and pump are different
• Cross-application: The FA20D and FA20DIT are NOT directly interchangeable; cross-application requires substantial ECU, fuel system, and turbocharger work

BRZ / 86 / FR-S Application Context

• Subaru BRZ (US market 2013-2020 first generation): Subaru’s lightweight rear-wheel-drive sport coupe; FA20D from 2013 model year
• Toyota 86 (US market 2017-2020): Toyota’s version of the same platform; renamed from Scion FR-S in 2017 when Scion brand was discontinued
• Scion FR-S (US market 2013-2016): Original Scion-branded version of the platform; became Toyota 86 in 2017
• Manufacturing: All three variants are manufactured by Subaru at the Gunma plant; Toyota / Scion variants have minor cosmetic differences but share the FA20D engine and platform
• Second-generation BRZ / GR86 (2022 plus): Uses larger FA24 2.4L NA engine (not the FA20D); not covered in this listing
• Rear-wheel drive: The BRZ / 86 / FR-S platform is rear-wheel drive (unique among Subaru products which are otherwise all symmetrical AWD)

Common FA20D Failure Modes

• Oil consumption (some examples): Some FA20D examples exhibit elevated oil consumption; Subaru / Toyota issued service campaigns and TSBs addressing piston ring designs in some production years
• Valve spring recall: Subaru issued a valve spring recall affecting some FA20D examples; verify recall completion before purchase
• Knock sensor failure: Common cause of check engine codes
• Timing chain wear: Rare but possible at very high mileage; chain is generally robust
• Carbon buildup substantially reduced: D-4S dual injection substantially reduces (does NOT eliminate) intake valve carbon buildup vs pure-DI engines; some carbon buildup possible at very high mileage but not requiring walnut shell blasting
• HPDI direct fuel pump failure (rare): The D-4S direct fuel system can experience HPDI pump failure but less common than pure-DI engines due to reduced direct injection duty cycle
• Spark plug access: Spark plug access on horizontally-opposed boxer is more difficult than inline engines

Subaru Boxer Engine Family Context

The Subaru BRZ FA20D (this listing) is the BRZ-specific NA variant of the FA20 engine family. For broader Subaru boxer engine context across our catalog and prior batches: the Subaru FA20 engine covers the broader FA20 family with both FA20D NA and FA20DIT turbo variants. The Subaru FA20DIT engine (is the WRX turbo variant of the FA20 family. The Subaru WRX engines (covers the WRX engine family including FA20DIT. The Subaru FB25 engine (is the modern FB family 2.5L NA. For EJ family context: EJ25 covers broader EJ25 family; EJ255, EJ257, EJ205, EJ251, EJ25 Turbo, and Cosworth EJ257 are EJ family variants. The FA20D BRZ engine represents the unique Subaru / Toyota collaboration; it shares architectural lineage with FA20DIT but is purpose-built for the NA sport coupe application.

Vehicle Compatibility

FA20D Architecture Specifications

D-4S Dual Injection System Reference

FA20D vs FA20DIT Comparison Reference

Application Year Reference (BRZ / 86 / FR-S)

Common Failure Modes and Maintenance Reference

Why Buy From Part Nests

• Engine verified as Subaru FA20D (BRZ-specific naturally-aspirated variant of FA20 family)
• Year confirmed (FA20D production approximately 2013-2020 for first-generation BRZ / 86 / FR-S applications)
• Application confirmed (Subaru BRZ 2013-2020, Toyota 86 2017-2020, Scion FR-S 2013-2016)
• Horsepower rating documented (200 HP at 7,000 RPM, 151 lb-ft at 6,400-6,600 RPM)
• Toyota D-4S dual injection system documented (BOTH direct AND port injection)
• Compression and leak-down tested all 4 cylinders
• Both cylinder heads condition documented (DOHC dual AVCS)
• HPDI direct fuel system condition documented (D-4S dual system)
• Timing chain condition assessed (FA family uses chain, NO scheduled belt replacement)
• Free shipping to all 50 states via heavy freight
• 15 day replacement warranty on internal defects
• Subaru-experienced support team familiar with FA20D / FA20DIT distinction and BRZ / 86 / FR-S applications
• Call (855) 634-4447 to verify application against your VIN before you order.