Toyota 2AZ engine

The Toyota 2AZ engine, part of the AZ engine series, is a 2.4-liter (2,362 cc) inline-4 gasoline engine designed for durability, fuel efficiency, and smooth performance. Launched in 2000 as a replacement for the 5S-FE engine, it incorporates advanced technologies such as an aluminum engine block and cylinder head, dual overhead camshafts (DOHC) with 16 valves, and Toyota’s Variable Valve Timing with intelligence (VVT-i) system. This allows for optimized power delivery and improved fuel economy across a range of driving conditions. The 2AZ-FE, the most common variant, uses multi-port fuel injection and delivers a power output typically ranging from 149 to 170 horsepower, depending on the application and tuning. It has a bore of 88.5 mm and a stroke of 96.0 mm, giving it a slightly oversquare design for better low-end torque. Widely used in Toyota models like the Camry, RAV4, Highlander, and Corolla XRS, as well as some Scion vehicles, the 2AZ engine is praised for its reliability but has been noted for occasional oil consumption issues in certain production years, often linked to piston ring design. Its lightweight construction and efficient design make it a versatile powerplant for both front-wheel-drive and all-wheel-drive configurations.

• Displacement: 2.4L (2,362 cc)
• Configuration: Inline-4
• Block/Head Material: Aluminum
• Valvetrain: DOHC, 16 valves with VVT-i
• Fuel System: Multi-port fuel injection (2AZ-FE variant)
• Power Output: 149–170 hp (model-dependent)
• Torque: Approximately 160–165 lb-ft (217–224 Nm)
• Bore x Stroke: 88.5 mm x 96.0 mm
• Compression Ratio: 9.6:1 to 9.8:1 (varies by model)
• Applications: Toyota Camry, RAV4, Highlander, Corolla XRS, Scion tC, Scion xB, etc.
• Production Years: 2000–present (various iterations)
• Notable Features: Lightweight design, VVT-i for efficiency, durable construction
• Common Issues: Oil consumption in some early 2000s models due to piston ring wear