The Renault 851 700 is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2006 and 2011. It features a common rail direct injection system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form, it delivered 110 kW (150 PS) and 340 Nm of torque, engineered for a blend of performance and efficiency in Renault's mid‑size vehicles.
Fitted to models such as the Laguna III and Espace IV, the 851 700 engine was designed for refined…
Production years 2006–2011 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/7890).
The Renault 851 700 is a 1,995 cc inline‑four turbo‑diesel engineered for mid‑size sedans and MPVs (2006-2011). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong, linear power and efficient long-distance performance. Designed to meet Euro 4 standards, it balances spirited driving with respectable fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.0 mm × 94.0 mm | |
Power output | 110 kW (150 PS) | |
Torque | 340 Nm @ 2,000 rpm | |
Fuel system | Bosch common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable‑geometry turbo (Garrett) | |
Timing system | Chain‑driven | |
Oil type | Renault RN0700 (SAE 5W‑40) | |
Dry weight | 155 kg |
The Renault 851 700 was used across Renault's Laguna III and Espace IV platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU mapping differences for estate variants-and no significant facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The 851 700's primary reliability risk is EGR valve failure, with elevated incidence in vehicles subjected to frequent short trips. Renault internal service data indicates a significant number of valves required cleaning or replacement before 100,000 km, while owner reports frequently cite DPF regeneration issues as a secondary concern. Short-trip driving and extended oil change intervals make adherence to the RN0700 specification and 15,000 km service intervals critical.
Analysis derived from Renault technical bulletins (2006-2011) and UK DVSA failure statistics (2012-2022). 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 851 700 can be a robust and powerful engine with proper maintenance. Its main weakness is the EGR valve, which requires periodic cleaning. Regular oil changes with RN0700 spec oil and addressing DPF regeneration issues promptly are crucial for longevity beyond 200,000 km. The timing chain is generally reliable for the engine's lifespan.
The most frequent issues are EGR valve clogging, DPF regeneration problems, and turbo actuator faults. Injector seal leaks are also a known issue on higher-mileage engines. These are well-documented in Renault service bulletins and require prompt attention to avoid further damage or emissions test failure.
The 851 700 2.0 dCi 150 engine was primarily used in the Renault Laguna III (2007-2011) and Espace IV (2006-2011). It was not used in other Renault models or licensed to other manufacturers during its production run.
Yes, the 851 700 responds very well to ECU remapping. A Stage 1 remap can safely increase power to around 180-190 PS and torque to 380-400 Nm. The standard internals and turbocharger are robust, making it a popular choice for tuning. Supporting modifications like a larger intercooler are recommended for Stage 2+.
Good for its power output. In a Laguna III, expect real-world figures of around 7.0 L/100km in mixed driving, translating to approximately 40 mpg (UK). Highway cruising can yield figures closer to 5.8 L/100km (49 mpg UK) under optimal conditions.
No. The 851 700 uses a timing chain and is not classified as an interference engine in its standard configuration. While a broken chain is still a serious failure, it is less likely to cause catastrophic internal damage compared to a belt-driven interference design.
Renault mandates the use of RN0700 specification oil, typically a 5W-40 synthetic. Using the correct oil is vital for protecting the turbocharger, DPF, and high-pressure fuel system. Oil and filter changes should be performed every 15,000 km or annually.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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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
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