The Renault M9R 808 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2006 and 2018. Developed jointly with Nissan, it features a DOHC 16‑valve layout, common rail direct injection, and a variable geometry turbocharger (VGT). Output ranges from 110 kW (150 PS) to 130 kW (177 PS), with torque figures between 340–380 Nm, providing strong pulling power for larger vehicles.
Fitted to models like the Espace IV, Laguna III, and Master van, the M9R 808 was engineere…
Production years 2006–2010 meet Euro 4 standards; 2011–2018 models meet Euro 5 compliance (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 808 is a 2,188 cc inline‑four turbo‑diesel engineered for MPVs, estates, and light commercial vehicles (2006-2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑end torque and smooth cruising. Designed to meet Euro 4 and Euro 5 standards, it balances load-carrying performance with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.0 mm × 90.0 mm | |
Power output | 110–130 kW (150–177 PS) | |
Torque | 340–380 Nm @ 1,500–2,750 rpm | |
Fuel system | Bosch CP1/CP4 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2006-2010); Euro 5 (2011-2018) | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 185 kg |
The Renault M9R 808 was used across Renault's MPV and LCV platforms with longitudinal mounting and co-developed with Nissan for shared applications. This engine received platform-specific adaptations-reinforced sump in the Master for commercial use and specific ECU mappings for the Espace-and from 2011 received updates for Euro 5 compliance, including revised EGR coolers. All adaptations are documented in OEM technical bulletins.
The M9R 808's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles subjected to extended service intervals or incorrect oil. Renault Technical Note 6014A highlights this as a critical failure point, while UK DVSA data correlates neglected maintenance with increased DPF-related faults. Urban driving and infrequent long runs make adherence to the RN0710 oil specification and service schedule critical.
Analysis derived from Renault technical bulletins (2008-2016) and UK DVSA failure statistics (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
The M9R 808 is generally robust with strong torque, but its long-term reliability hinges on strict maintenance. The high-pressure fuel pump is a known weak point if incorrect oil (non-RN0710) or extended intervals are used. Adhering to the 20,000 km service schedule with the correct 5W-30 oil significantly improves longevity and prevents major failures.
The most frequent issues are high-pressure fuel pump failures (linked to oil/service neglect), EGR valve and cooler clogging (causing rough running), DPF regeneration problems (leading to limp mode), and turbo actuator faults (resulting in boost issues). These are well-documented in Renault service bulletins like TN 6014A.
The M9R 808 was primarily used in the Renault Espace IV (dCi 150/175), Laguna III (dCi 150/175), and Master van (dCi 150) from 2006 to 2018. It was also shared with Nissan, powering the Navara D40 pickup (2.5 dCi) from 2007 to 2014, showcasing its joint development.
Yes, the M9R 808 responds well to ECU remapping. Stage 1 tunes can safely increase power by 20-30 kW and torque by 50-70 Nm, as the engine and turbo have good headroom. Popular on Espace and Laguna models for improved towing. Ensure supporting modifications like a performance intercooler and use high-quality fuel and oil to maintain reliability.
Fuel economy is respectable for its size. In an Espace IV dCi 150, expect around 7.5 L/100km (38 mpg UK) in mixed driving. The heavier Master van will be closer to 8.5-9.0 L/100km (33-31 mpg UK). Highway cruising can yield figures as low as 6.0 L/100km (47 mpg UK). Real-world economy depends heavily on load and driving style.
Yes. The M9R 808 is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the front-mounted timing chain is generally very durable with proper oil changes.
Renault mandates the use of 5W-30 synthetic oil meeting the RN0710 specification. This is non-negotiable for protecting the high-pressure fuel pump and turbocharger. Using the correct oil and changing it every 20,000 km (or 12 months) is the single most important factor in ensuring the engine's long-term health.
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Regulation (EC) No 715/2007
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