The Renault M9R 816 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2007 and 2011. It features a double overhead camshaft (DOHC) layout, common rail direct injection, and a variable geometry turbocharger (VGT). This configuration delivers strong low — end torque for effortless everyday drivability, with outputs typically around 110 kW (150 PS) and 340 Nm.
Fitted to models such as the Laguna III and Espace IV, the M9R 816 was engineered for refined cruisin…
Production years 2007–2009 meet Euro 4 standards; 2010–2011 models may have Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 816 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and large vehicles (2007-2011). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong low‑end torque and smooth highway performance. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances power with efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.3 mm × 89.0 mm | |
Power output | 110 kW (150 PS) | |
Torque | 340 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre‑2010); Euro 5 depending on market | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain-driven | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 185 kg |
The Renault M9R 816 was used across Renault's Laguna III and Espace IV platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Espace for its heavier chassis-and no significant facelift revisions during its production run, ensuring broad parts interchangeability within the 2007-2011 model years. All adaptations are documented in OEM technical bulletins.
The M9R 816's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Renault Technical Note MEC 0078 documents this issue, while UK DVSA records show a correlation between DPF-related faults and urban driving patterns. Extended short trips and low-quality diesel make adherence to fuel and oil specifications critical.
Analysis derived from Renault technical bulletins (2008-2012) 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 816 is generally robust with strong torque, but its longevity heavily depends on maintenance. The primary concern is the high-pressure fuel pump, which can fail with poor fuel quality. Using the correct RN0710 oil and EN 590 diesel, along with regular DPF regeneration cycles, significantly improves long-term reliability.
The most frequent issues are high-pressure fuel pump failure, DPF clogging (especially with urban driving), EGR valve/cooler carbon buildup, and turbo actuator sticking. These are well-documented in Renault service notes and owner reports, with the fuel pump being the most critical failure point.
The M9R 816 2.2 dCi 150 engine was primarily used in the Renault Laguna III (2007-2011) and the Renault Espace IV (2007-2010). It was the standard 150 PS diesel option for these models during their respective production runs, meeting Euro 4 and some Euro 5 standards.
Yes, the M9R 816 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 180-190 PS and torque to 400+ Nm. The stock internals are generally strong enough for this level of increase. Further power gains require supporting modifications like a larger intercooler or hybrid turbo.
Fuel economy is very good for its size. In a Laguna III, expect around 6.5 L/100km (43 mpg UK) in mixed driving and up to 5.5 L/100km (51 mpg UK) on the highway. Real-world figures depend heavily on driving style and ensuring the DPF regenerates properly to avoid efficiency penalties.
Yes. The M9R 816 is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. While chain failure is rare, it underscores the importance of using the correct engine oil.
Renault mandates the use of 5W-30 engine oil meeting the RN0710 specification. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is crucial for protecting the DPF and catalytic converter from clogging and for ensuring proper lubrication of the turbocharger and timing chain.
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)
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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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