The Renault L7X 731 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2000 and 2006. It features a cast‑iron block, aluminium head, indirect injection via pre — chambers, and a fixed‑geometry turbocharger. In its 85 kW (115 PS) form, it delivers peak torque of 270 Nm, providing strong pulling power suited to larger vehicles and light towing.
Fitted to models like the Laguna II and Espace III, the L7X 731 was engineered for comfortable, torque — rich performanc…
All production years (2000–2006) meet Euro 3 standards .
The Renault L7X 731 is a 2,188 cc inline‑four turbo‑diesel engineered for D-segment sedans and MPVs (2000-2006). It combines indirect injection with a fixed‑geometry turbocharger to deliver strong low-to-mid range torque for relaxed cruising and light load carrying. Designed to meet Euro 3 standards, it prioritizes durability and torque over ultimate refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 94.0 mm | |
Power output | 85 kW (115 PS) | |
Torque | 270 Nm @ 2,000 rpm | |
Fuel system | Indirect injection (Bosch VP44 rotary pump) | |
Emissions standard | Euro 3 | |
Compression ratio | 18.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed‑geometry turbo (Garrett) | |
Timing system | Belt‑driven | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 185 kg |
The Renault L7X 731 was used across Renault's D-segment platforms with transverse mounting. This engine received platform-specific adaptations-different engine mounts and accessory brackets for the Laguna II versus the Espace III-but no major revisions occurred during its production run. All adaptations are documented in OEM technical bulletins.
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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.
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The L7X 731 is a robust, torquey engine known for its durability when properly maintained. Its main Achilles' heel is the potential for injector seal and pre-chamber liner failure, which can be expensive to fix. With strict adherence to the timing belt replacement schedule and regular oil changes, it can reliably reach high mileages.
The most frequent and serious issue is injector seal and pre-chamber liner failure, leading to coolant in the cylinders. Other common problems include timing belt failure if not replaced on schedule, turbocharger oil seal leaks, and glow plug wear. These are well-documented in Renault service bulletins.
This 2.2L dCi engine was used in Renault's larger vehicles. Key models include the Laguna II (2000-2005) and the Espace III (2000-2006). It was not shared with Nissan or other alliance partners, being a unique design for Renault's D-segment at the time.
Aftermarket ECU tuning is common on the L7X-731 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.
Respectable for its size and era. In a Laguna II, expect around 7.0 L/100km (40 mpg UK) on a combined cycle. Real-world figures: 8.5-9.5 L/100km (33-30 mpg UK) in city driving and 6.0-6.5 L/100km (47-43 mpg UK) on the highway. The heavier Espace will return slightly higher consumption.
Yes. The L7X 731 is an interference engine. If the timing belt fails or jumps, the pistons will collide with the open valves, causing severe internal engine damage. This is why adhering to the 120,000 km or 5-year replacement interval is absolutely critical.
Renault specifies RN0700 specification oil, typically a 10W-40 mineral or semi-synthetic for this pre-common-rail engine. This is crucial for protecting the Bosch VP44 injection pump and the turbocharger. Using the correct oil helps prevent premature wear and ensures the longevity of critical components.
Comprehensive technical documentation and regulatory references
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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
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