The Renault L7X 727 is a 2,946 cc, V6 turbo‑diesel engine produced between 1998 and 2002. It features a dual overhead camshaft (DOHC) design, common rail direct injection, and a fixed‑geometry turbocharger. In its primary 120 kW (163 PS) tune, it delivers 310 Nm of torque, engineered for executive sedans and large MPVs. The DOHC layout prioritised refinement and power delivery for premium applications.
Fitted exclusively to the Laguna II and Espace III, the L7X 727 was eng…
All production years (1998–2002) meet Euro 3 standards .
The Renault L7X 727 is a 2,946 cc V6 turbo‑diesel engineered for executive and large MPV platforms (1998-2002). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver smooth, linear power and strong towing capability. Designed to meet Euro 3 standards, it balances premium refinement with diesel efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,946 cc | |
Fuel type | Diesel | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 120 kW (163 PS) | |
Torque | 310 Nm @ 1,500–3,000 rpm | |
Fuel system | Bosch VP44 rotary injection pump (pre-common rail) | |
Emissions standard | Euro 3 | |
Compression ratio | 18.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed‑geometry turbo (Garrett) | |
Timing system | Chain‑driven | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 225 kg |
The Renault L7X 727 was used across Renault's executive platforms with transverse mounting. This engine received no significant platform-specific adaptations during its production run, maintaining consistent specifications across the Laguna II and Espace III. No licensing partnerships were documented for this engine family. All applications 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.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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
The L7X 727 is a robust and smooth engine when maintained properly. Its main weakness is the Bosch VP44 fuel pump, which is sensitive to poor fuel quality. With strict adherence to oil change intervals, use of high-quality diesel, and avoiding prolonged inactivity, these engines can reliably exceed 250,000 km. The timing chains are very durable.
The most frequent and critical issue is failure of the Bosch VP44 high-pressure fuel pump, often caused by bad fuel. Other common problems include EGR system clogging, turbo oil seal leaks causing blue smoke, and valve cover gasket leaks. These are well-documented in Renault service bulletins.
This 2.9L dCi V6 engine was used exclusively in the Renault Laguna II (1998–2002) and Espace III (1998–2002). It was Renault's first V6 diesel and was not shared with any other manufacturers. It was replaced by the 3.0L dCi (ZD3) engine in 2002.
Yes, but with caution. The VP44 pump can be recalibrated for modest power gains (up to ~180 PS), but pushing beyond this significantly increases the risk of pump failure. The engine internals are strong, but the stock turbo and intercooler become limiting factors. Any tuning should be accompanied by upgraded cooling and strict fuel quality control.
As expected for a 3.0L V6 diesel of its era, economy is moderate. In a Renault Laguna II, expect real-world figures of ~8.5 L/100km (33 mpg UK) on a mixed run and ~7.0 L/100km (40 mpg UK) on a steady motorway cruise. City driving will be higher, around 10.0–11.0 L/100km (28–25 mpg UK), depending on traffic.
Yes. The L7X 727 is an interference engine. If the timing chain were to fail (which is very rare) or jump timing, the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the dual chain system is extremely durable and rarely fails if oil is changed regularly.
Renault mandates oil meeting the RN0700 specification, typically a 10W-40 mineral or semi-synthetic. Using the correct oil is vital for protecting the VP44 fuel pump and timing chains. Always change the oil at or before the 15,000 km service interval to maintain engine health.
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.