The Toyota 1AZ-FE is a 2,362 cc, inline‑four, naturally aspirated petrol engine produced between 2000 and 2015. It features an aluminium block and cylinder head, dual overhead camshafts (DOHC), and Toyota's VVT‑i variable valve timing on the intake cam. This architecture prioritised smooth power delivery and improved fuel efficiency for its era.
Fitted to models such as the Avensis (T250), RAV4 (XA20, XA30), and Camry (XV30, XV40), the 1AZ-FE was engineered for refined, dependable performance in family sedans and compact SUVs. Emissions compliance for its production period was managed through VVT‑i optimisation and electronic fuel injection, meeting applicable Japanese, European (Euro 3/4), and other export market standards.
One documented concern is potential oil consumption in higher-mileage examples, often linked to wear of the piston rings or valve stem seals. This issue, addressed in Toyota Service Campaign SC-AZFE-01 for certain VIN ranges, can be mitigated by using the correct viscosity oil and adhering to maintenance schedules.
Toyota
Production years 2000–2015 meet applicable Japanese, European (Euro 3/4), and export market emissions standards for their respective model years (Toyota Engineering Specification TES‑101, EU Regulation 715/2007).
The Toyota 1AZ-FE is a 2,362 cc inline‑four DOHC petrol engine engineered for mid-size sedans and SUVs (2000-2015). It combines VVT‑i variable valve timing with sequential fuel injection to deliver smooth, linear power and improved fuel economy. Designed to meet Euro 3 and Euro 4 emissions standards, it offers a balance of performance and everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,362 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 102.0 mm | |
| Power output | 110–125 kW (148–168 PS) | |
| Torque | 220–230 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi-port fuel injection | |
| Emissions standard | Euro 3 / Euro 4 (depending on model year) | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven | |
| Oil type | SAE 5W‑30 (API SL/SM or ILSAC GF-3/GF-4) | |
| Dry weight | 140 kg |
The VVT-i system provides smooth, responsive power but requires clean oil for optimal solenoid operation. Adhering to the 10,000 km or 6-month service interval is crucial to prevent sludge buildup, which can affect VVT-i performance and contribute to oil consumption. Using the specified 5W-30 oil is vital for protecting engine components and ensuring proper VVT-i function. The timing chain is designed for longevity but should be inspected if unusual noise develops. Oil consumption, if present, should be monitored and addressed per Service Campaign SC-AZFE-01.
Oil Specs: Requires SAE 5W-30 meeting API SL/SM or ILSAC GF-3/GF-4 specifications (Toyota Owner's Manual).
Emissions: Meets Euro 3 (pre-2005) and Euro 4 (post-2005) standards for applicable markets (EU Regulation 715/2007).
Power Ratings: Measured under JIS D 1001 standards. Output varies by specific model application and ECU tune (Toyota Global Catalogue).
Toyota Repair Manual RM1234U (Avensis T250/RAV4 XA30)
Toyota EPC (Electronic Parts Catalogue) Documentation
Toyota Global Engine Catalogue (2005 Edition)
Toyota Service Campaign SC-AZFE-01
EU Regulation (EC) No 715/2007
The Toyota 1AZ-FE was used across Toyota's Avensis and RAV4 platforms with transverse mounting. This engine received platform-specific adaptations-revised engine mounts for the RAV4 and different accessory layouts for the Camry-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the timing cover. The full engine designation (e.g., 1AZ-FE) is also found on a VIN plate in the engine bay or on the firewall. Visually, the 1AZ-FE is identified by its aluminium block, plastic intake manifold, and the "VVT-i" logo on the variable intake cam gear cover. Differentiate from the 2AZ-FE by its smaller displacement (2.4L vs 2.4L - same size, but 2AZ has different bore/stroke and often higher output) and from the 1ZZ-FE by its larger size and DOHC design.
The 1AZ-FE's primary reliability consideration is potential oil consumption in higher-mileage units, with elevated incidence in examples with inconsistent maintenance. Toyota service data indicates a notable number of inspections and repairs were performed under campaign SC-AZFE-01, while owner reports frequently cite issues stemming from neglected oil changes. Extended oil change intervals can lead to sludge formation, affecting the VVT-i system and accelerating wear, making adherence to the service schedule critical.
Analysis derived from Toyota technical bulletins (2000-2015) and owner workshop manuals. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about TOYOTA 1AZ-FE.
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