The Toyota 1WW is a 4,461 cc, inline‑six, turbo‑diesel engine produced between 2007 and 2015. It features a cast iron block, an aluminium alloy cylinder head, and dual overhead camshafts (DOHC) with 24 valves. This heavy — duty design prioritised maximum torque and exceptional durability for commercial and off — road applications.
Fitted primarily to the Land Cruiser 70 Series (J70) in select markets, the 1WW was engineered for extreme reliability under harsh condition…
Production years 2007–2015 meet Euro 4 emissions standards .
The Toyota 1WW is a 4,461 cc inline‑six turbo‑diesel engineered for heavy-duty SUVs and commercial vehicles (2007-2015). It combines a robust cast iron block with common rail direct injection to deliver immense, sustained torque and legendary off-road durability. Designed to meet Euro 4 emissions standards, it prioritizes mechanical strength and serviceability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,461 cc | |
Fuel type | Diesel | |
Configuration | Inline‑6, DOHC, 24‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 94.0 mm × 107.0 mm | |
Power output | 151 kW (205 PS) | |
Torque | 430 Nm @ 1,200–3,200 rpm | |
Fuel system | Common rail direct injection (Denso) | |
Emissions standard | Euro 4 | |
Compression ratio | 17.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed geometry turbo | |
Timing system | Gear-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 365 kg |
The Toyota 1WW was used exclusively in Toyota's J70 platform with longitudinal mounting for heavy-duty applications. This engine was fitted specifically to the Land Cruiser 70 Series in select global markets (not Europe or North America), creating significant regional interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
The 1WW's primary reliability risk is high-pressure fuel pump drive gear failure, with elevated incidence in high-mileage or heavily loaded engines. Toyota service data indicated this was most prevalent in vehicles used for constant heavy towing or off-road work, while owner reports frequently cite injector failure as a secondary concern. Infrequent oil changes and use of incorrect viscosity oil accelerate wear, making adherence to the maintenance schedule critical.
Analysis derived from Toyota technical bulletins (2007-2015) and owner-reported failure statistics (compiled 2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the 1WW is renowned for its extreme long-term reliability and durability when properly maintained. Its gear-driven design is virtually indestructible. The main concern is the fuel pump drive gear on heavily worked examples, which Toyota addressed. With regular oil changes and using the correct heavy-duty oil (15W-40), these engines routinely exceed 500,000 km in commercial use.
The most common issues are high-pressure fuel pump drive gear failure (causing sudden power loss), fuel injector failure (causing misfires), turbocharger failure (due to oil starvation), and glow plug system issues (causing hard starting). These are well-documented, and most have definitive OEM repair procedures.
The 1WW was used exclusively in the Toyota Land Cruiser 70 Series (J76, J78, J79) from 2007 to 2015. It was never officially sold in Europe or North America, being reserved for markets like Australia, Africa, the Middle East, and parts of Asia where extreme durability is paramount.
Aftermarket ECU tuning is common on the 1WW platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is poor by modern standards, as expected for a large, heavy-duty diesel. Expect around 14.0–16.0 L/100km (17–20 mpg UK) in mixed driving for a Land Cruiser 70 Series. Highway cruising can yield figures closer to 12.0–14.0 L/100km (20–24 mpg UK). Economy is heavily dependent on vehicle load and terrain.
No. The Toyota 1WW is a non-interference engine. This means if the timing gears were to somehow fail (an extremely rare event), the pistons would not contact the valves. This is a major safety feature for an engine designed for remote-area travel.
Toyota specifies SAE 15W-40 engine oil meeting API CI-4 (or newer) standards. A good quality heavy-duty diesel oil (API CK-4) is recommended, especially for vehicles used for towing or off-road work. Change intervals should not exceed 10,000 km or 6 months under severe conditions.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.