The Subaru EJ202 is a 1,994 cc, flat-four petrol engine produced between 1996 and 2001. It features a DOHC 16-valve configuration with multi-point fuel injection (MPFI) and delivers 118 kW (160 PS) in standard applications. Part of Subaru's renowned EJ series, it was engineered for compact all-wheel-drive platforms, offering smooth operation, balanced weight distribution, and proven durability across various global markets.
Fitted to models such as the Impreza GC/GM series, Legacy BC/BD, and Forester SF, the EJ202 was designed for drivers seeking reliable everyday performance with Subaru’s signature AWD capability. Emissions compliance was achieved through oxygen sensor feedback control and catalytic converters, allowing most units to meet Euro 2 standards, with later builds achieving Euro 3 depending on market and model year.
One documented reliability concern is head gasket degradation under prolonged thermal stress, highlighted in Subaru Service Information Bulletin SSB-97-021. This issue is often associated with coolant system neglect or extended service intervals. In 1997, Subaru revised the cylinder head bolt torque sequence and introduced updated gasket materials to improve sealing integrity.
Production years 1996–1999 meet Euro 2 standards; 2000–2001 models comply with Euro 3 (VCA UK Type Approval #VCA/EMS/1815).
The Subaru EJ202 is a 1,994 cc flat-four naturally aspirated engine engineered for compact and mid-size applications (1996–2001). It combines Subaru's horizontally-opposed layout with MPFI to deliver balanced power delivery and mechanical refinement. Designed to meet Euro 2–3 emissions, it balances drivability with longevity in diverse operating conditions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,994 cc | |
| Fuel type | Petrol | |
| Configuration | Flat-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 118 kW (160 PS) @ 6,400 rpm | |
| Torque | 186 Nm @ 5,200 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 2 (pre-2000); Euro 3 (2000-2001) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Belt-driven (front-mounted) | |
| Oil type | SAE 10W-30 (API SH) | |
| Dry weight | 130 kg |
The flat-four layout provides excellent balance and low center of gravity ideal for all-wheel-drive dynamics but requires adherence to maintenance schedules to sustain longevity. SAE 10W-30 oil meeting API SH specifications is recommended for optimal lifter and camshaft lubrication. Oil changes should occur every 10,000 km or annually to prevent sludge buildup and timing belt wear. The non-interference design reduces risk of valve damage during belt failure, but regular inspection remains critical due to age-related degradation. Valve clearance adjustments are required every 30,000 km using feeler gauges per factory procedure.
Oil Specs: Requires API SH-rated 10W-30 oil (Subaru SIB SSB-97-021). Compatible with ILSAC GF-2 requirements.
Emissions: Euro 3 certification applies to post-2000 models only (VCA Type Approval #VCA/EMS/1815). Pre-2000 variants meet Euro 2.
Power Ratings: Measured under JIS D 1001 standards. Output achieved with 91 RON fuel and optimal ignition timing (Subaru TIS Doc. A20PERF).
Subaru Technical Information System (TIS): Docs A20EJ, A20FUEL, A20TIMING
VCA Type Approval Database (VCA/EMS/1815)
JIS D 1001: Internal combustion engine — Test code
The Subaru EJ202 was used across Subaru's Impreza, Legacy, and Forester platforms with longitudinal mounting and symmetrical all-wheel drive. This engine received platform-specific adaptations-reinforced mounts in the Legacy BD and revised intake manifolds in the Forester SF-and from 1997 the updated Impreza GC8 models adopted revised head gasket materials and torque procedures, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-left cylinder block near the exhaust manifold (Subaru TIS A20ID01). The 4th digit of the VIN indicates engine family ('E' for EJ series). Pre-1997 models have silver valve covers with ribbed rocker housings; post-1997 units use black valve covers with revised fastener layouts. Critical differentiation from EJ18E: EJ202 has larger bore and different crankshaft. Service parts require production date verification - head gaskets and timing belts for pre-1997 models are incompatible with later revisions due to sealing surface updates (Subaru SIB SSB-97-021).
The EJ202's primary reliability risk is head gasket failure on high-mileage engines, with elevated incidence in vehicles with inconsistent cooling system maintenance. Internal Subaru engineering reports noted increased gasket blowout rates beyond 150,000 km, while UK DVSA field data shows a notable share of coolant contamination failures linked to degraded seals. Extended overheating cycles and delayed maintenance increase thermal stress, making coolant quality and flush intervals critical.
Analysis derived from Subaru technical bulletins (1996-2001) and UK DVSA failure statistics (1995-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SUBARU EJ202.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with SUBARU or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
SUBARU Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialSUBARU documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
