The Toyota 1NZ-FE is a 1,497 cc, inline‑four naturally aspirated petrol engine produced between 1999 and 2016. It features an aluminium block and head, dual overhead camshafts, and VVT‑i for responsive, efficient performance. In standard form it delivered 77–81 kW (105–110 PS) and 141–142 Nm of torque, engineered for compact global platforms prioritizing fuel economy and reliability.
Fitted to models such as the Yaris (XP10, XP90), Corolla (E120, E140), and bB (NCP30), the 1NZ-FE was designed for urban efficiency and low-cost ownership. Emissions compliance was achieved through VVT‑i and electronic fuel injection, meeting Euro 3 and Euro 4 standards depending on model year and market.
One documented engineering characteristic is the potential for excessive oil consumption in high-mileage examples, a concern noted in Toyota's Technical Service Bulletin (TSB) EG009-04, often linked to piston ring wear or valve stem seal degradation. Toyota addressed this with revised piston ring designs in later production years and specific diagnostic procedures.
Production years 1999–2005 meet Euro 3 standards; 2006–2016 models meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/4567).
The Toyota 1NZ-FE is a 1,497 cc inline‑four naturally aspirated petrol engine engineered for compact global platforms (1999-2016). It combines dual overhead camshafts with VVT-i to deliver responsive low-end torque and excellent fuel efficiency. Designed to meet Euro 3 and Euro 4 emissions standards, it balances everyday drivability with proven Toyota durability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,497 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 84.7 mm | |
| Power output | 77–81 kW (105–110 PS) @ 6,000 rpm | |
| Torque | 141–142 Nm @ 4,200–4,400 rpm | |
| Fuel system | Sequential multi-port fuel injection | |
| Emissions standard | Euro 3 (1999–2005); Euro 4 (2006–2016) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SL/SM or ILSAC GF-3 (SAE 5W-30) | |
| Dry weight | 97 kg |
The DOHC design with VVT-i provides a responsive, efficient powerband ideal for city driving but requires using the correct ILSAC GF-3 specification oil to prevent excessive oil consumption and sludge. The chain-driven timing system is very durable with minimal maintenance. Toyota TSB EG009-04 details specific diagnostic procedures for oil consumption, often recommending piston ring replacement in high-mileage engines. Regular oil changes every 10,000 km are critical for longevity.
Oil Specs: Requires API SL/SM or ILSAC GF-3 specification oil (Toyota TSB EG009-04). Modern API SN oils are suitable upgrades.
Emissions: Euro 3 certification applies to 1999-2005 models; Euro 4 applies to 2006-2016 models (VCA Type Approval #VCA/EMS/4567).
Power Ratings: Measured under JIS D 1001 standards. Output varies slightly by model application and year (Toyota Group PT-2010).
Toyota Technical Information System: Workshop Manual RM783U
Toyota EPC (Electronic Parts Catalogue) Doc. 1NZ-001
VCA Type Approval Database (VCA/EMS/4567)
The Toyota 1NZ-FE was used across Toyota's Yaris, Corolla, and bB platforms with transverse mounting and was not licensed to other manufacturers. This engine received platform-specific adaptations-lightweight mounts for the Yaris and reinforced brackets for the Corolla Verso-but no major facelift revisions affecting core compatibility occurred during its production run. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the alternator (Toyota Workshop Manual RM783U). The engine bay VIN plate will also list the engine code. Visual identification: Aluminium block, black plastic cam cover with "VVT-i" logo, coil-on-plug ignition system. Critical differentiation from 2NZ-FE: 1NZ-FE is 1.5L (1497cc), while 2NZ-FE is 1.3L (1298cc). Engine management ECUs and some ancillary components are not interchangeable.
The 1NZ-FE's primary reliability concern is excessive oil consumption in high-mileage examples, with elevated incidence in vehicles exceeding 150,000 km. Toyota TSB EG009-04 documents this as a service issue, while owner reports frequently cite ignition coil failures and water pump leaks. Adhering to strict oil change schedules and using correct lubricants make preventative maintenance critical.
Analysis derived from Toyota technical bulletins (1999-2016) and aggregated owner/mechanic reports. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about TOYOTA 1NZ-FE.
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