The Renault M9R 865 is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2015 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 120 kW (163 PS), with torque peaking at 380 Nm for responsive performance across the rev range.
Fitted to models such as the Mégane IV, Scénic IV, and Espace V—inclu…
Production years 2015–2018 meet Euro 6b standards across all markets .
The Renault M9R 865 is a 1,995 cc inline‑four turbo‑diesel engineered for compact and mid‑size platforms (2015–2018). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver smooth torque and responsive acceleration. Designed to meet Euro 6b 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 | 120 kW (163 PS) | |
Torque | 380 Nm @ 1,750–2,750 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 172 kg |
The Renault M9R 865 was used across Renault's Mégane IV and Scénic IV platforms with transverse mounting and shared with Nissan for select Euro 6 applications. This engine received platform-specific adaptations—enhanced cooling in the Espace V and revised engine mounts in the Kadjar—and from 2017 the introduction of updated AdBlue control modules created minor interchange limits. Partnerships enabled Nissan's dCi 160 variant in the X-Trail (T32). 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M9R 865 offers refined performance and full Euro 6b compliance, but is highly sensitive to AdBlue and diesel quality. With regular use, ISO 22241 AdBlue, EN 590 diesel, and 20,000 km oil changes, it can be durable beyond 200,000 km. Infrequent use significantly increases AdBlue system risks.
Top issues include AdBlue injector crystallisation (from poor fluid or inactivity), CP4.2 fuel pump wear, NOx sensor drift, and EGR valve sticking. These are documented in Renault service bulletins NTM 10‑089 and NTM 07‑045, especially in vehicles with irregular usage patterns.
The M9R 865 powered the Mégane IV, Scénic IV, Espace V, and Kadjar (2015–2018) in dCi 160 form. It was also used by Nissan in the X-Trail (T32) from 2016–2018 under joint-engineering agreements, always paired with Euro 6b emissions hardware including AdBlue.
Aftermarket ECU tuning is common on the M9R-865 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.
Efficient for its output. In a Mégane IV dCi 160, expect ~6.2 L/100km city and ~4.6 L/100km highway, or ~46 mpg UK combined. Real-world mixed driving typically returns 42–48 mpg (UK), assuming good maintenance, EN 590 diesel, and regular AdBlue top-ups.
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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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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