The Renault M9R 854 is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2013 and 2018. Developed jointly with Nissan under the Renault–Nissan Alliance, it features a common‑rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivered 130 kW (177 PS), with torque peaking at 380 Nm for responsive performance across the rev range.
Fitted to models such as the Mégane III, Scénic III, and Espace IV—in…
Production years 2013–2018 meet Euro 6 standards across all markets (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 854 is a 1,995 cc inline‑four turbo‑diesel engineered for performance-oriented passenger and MPV platforms (2013–2018). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver high torque and brisk acceleration. Designed to meet Euro 6 emissions from launch, it integrates SCR/AdBlue technology alongside EGR and DPF systems.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 130 kW (177 PS) | |
Torque | 380 Nm @ 2,000–2,750 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0720 (ACEA C3, SAE 5W‑30) | |
Dry weight | 172 kg |
The Renault M9R 854 was used across Renault's Mégane III and Scénic III platforms with transverse mounting and shared with Nissan for select high-output applications. This engine received platform-specific adaptations—reinforced engine mounts in the Espace IV and enhanced cooling in the Mégane R.S. dCi—and from 2016 the introduction of the M9R Gen 3 with updated AdBlue dosing created minor interchange limits. Partnerships enabled Nissan's dCi 180 variant in the Qashqai+2. All adaptations are documented in OEM technical bulletins.
The M9R 854's primary reliability risk is CP4.2 high-pressure fuel pump wear, with elevated incidence in vehicles using marginal-quality diesel or exceeding service intervals. Renault internal field reports from 2016 noted a significant share of dCi 180 vehicles requiring pump replacement before 120,000 km in certain markets, while UK DVSA MOT data links hard-start and limp-mode complaints to fuel system faults in high-output M9R variants. Extended short-trip driving and AdBlue system neglect further accelerate emissions component degradation, making strict maintenance adherence critical.
Analysis derived from Renault technical bulletins (2013–2018) 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 854 offers strong performance and Euro 6 compliance, but is sensitive to fuel and oil quality. The CP4.2 pump is a known weak point if maintenance is deferred or low-quality diesel is used. With strict 20,000 km service intervals and EN 590 diesel, it can be durable beyond 200,000 km.
Top issues include CP4.2 high-pressure fuel pump wear, AdBlue/SCR system faults (often from incorrect fluid), EGR cooler leaks, and turbo bearing wear. These are documented in Renault service bulletins NTM 07‑045 and NTM 08‑112, particularly in high-mileage or poorly maintained examples.
The M9R 854 powered the Mégane III, Scénic III, and Espace IV (2013–2016) in dCi 180 form. It was also used by Nissan in the Qashqai+2 (J10) from 2014–2017 under joint-engineering agreements, always paired with Euro 6 emissions hardware including AdBlue.
Yes, but with caution. Stage 1 ECU remaps typically yield +25–35 kW, but the CP4.2 pump and turbo are already near design limits. Supporting upgrades (oil cooler, fuel system enhancements) and strict adherence to high-quality diesel are essential to avoid premature failure.
Good for its output. In a Mégane III dCi 180, expect ~6.8 L/100km city and ~5.0 L/100km highway, or ~42 mpg UK combined. Real-world mixed driving typically returns 38–45 mpg (UK), assuming good maintenance and EN 590 diesel.
Yes. The M9R series is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. While chain issues are rare, any timing-related fault codes or unusual noises warrant immediate inspection.
Renault specifies SAE 5W-30 oil meeting RN0720 (ACEA C3) standard. Always use a low-SAPS synthetic oil and change every 20,000 km or annually to protect the DPF, SCR catalyst, turbo, and high-pressure fuel system.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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