The Toyota 2AZ-FSE is a 2,362 cc, inline‑four petrol engine produced between 2003 and 2012. It features an aluminium block and head, dual overhead camshafts (DOHC), and 16 valves with VVT‑i (Variable Valve Timing‑intelligent) on the intake camshaft. This engine uniquely employs Toyota's D-4 direct fuel injection system, delivering outputs typically between 118–125 kW (160–170 PS) and 224–230 Nm of torque.
Fitted to premium models like the Avensis (T250), RAV4 (XA30), and Camry (XV40), the 2AZ-FSE was engineered for refined, efficient performance with strong mid-range torque. Emissions compliance was achieved through direct injection and precise electronic control, meeting Euro 4 standards for most applications.
One documented service consideration is carbon buildup on intake valves, a known characteristic of early direct injection engines without port wash. This issue, addressed in Toyota Technical Service Bulletin EG015-08, can lead to rough idle and reduced performance. Toyota recommended specific cleaning procedures and, in some markets, revised ECU calibrations to mitigate symptoms.
Toyota
Production years 2003–2012 meet Euro 4 standards for applicable markets (VCA UK Type Approval #VCA/EMS/6789).
The Toyota 2AZ-FSE is a 2,362 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and SUVs (2003-2012). It combines aluminium construction with direct fuel injection (D-4) and VVT‑i to deliver smooth, torque-rich performance and enhanced fuel efficiency. Designed to meet Euro 4 standards, it balances refinement with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,362 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 88.5 mm × 96.0 mm | |
| Power output | 118–125 kW (160–170 PS) | |
| Torque | 224–230 Nm @ 4,000 rpm | |
| Fuel system | Toyota D-4 Direct Injection | |
| Emissions standard | Euro 4 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SL/SM, SAE 5W‑30 | |
| Dry weight | 140 kg |
The D-4 direct injection system provides excellent fuel atomization and power but lacks the intake valve cleaning effect of port injection, leading to potential carbon buildup. Regular (every 60,000-80,000 km) professional intake valve cleaning is recommended. The timing chain is designed for longevity but requires correct oil (5W-30) and regular changes. Using Top Tier detergent petrol can help mitigate carbon formation. TSB EG015-08 outlines diagnostic and cleaning procedures for affected vehicles.
Oil Specs: Requires API SL/SM (or newer) 5W-30 oil (Toyota Owner's Manual). ACEA A5/B5 specification is also suitable.
Emissions: Euro 4 certification applies to all 2003-2012 models for applicable markets (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Output varies by model application and ECU calibration (Toyota Group PT-2008).
Toyota Technical Information System (TIS): Docs RM920U, EG015-08
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Certification Standards
The Toyota 2AZ-FSE was used across Toyota's MC and XA platforms with transverse mounting. This engine received platform-specific adaptations-different intake manifolds for the RAV4 and Avensis-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the exhaust manifold (Toyota TIS RM920U). The 8th VIN digit typically indicates engine type ('Z' for 2AZ series). The 2AZ-FSE has a black plastic valve cover with "D-4" and "VVT-i" embossed on it. Critical differentiation from the 2AZ-FE: The 2AZ-FSE uses direct fuel injection (injectors in the combustion chamber) while the 2AZ-FE uses port injection. The high-pressure fuel pump on the 2AZ-FSE is driven by the exhaust camshaft and is a key visual identifier. Service parts like fuel injectors and fuel pumps are not interchangeable between 2AZ-FSE and 2AZ-FE engines.
The 2AZ-FSE's primary documented reliability concern is carbon buildup on intake valves, a systemic trait of its direct injection design, with elevated incidence in vehicles subjected to frequent short trips. Toyota TSB EG015-08 acknowledges this characteristic, while general owner data indicates it is manageable with preventative maintenance. Neglecting intake cleaning can lead to drivability issues, making adherence to recommended service intervals critical.
Analysis derived from Toyota technical bulletins (2003-2012) and general owner-reported failure data (2003-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about TOYOTA 2AZ-FSE.
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