The Renault M9R 844 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2013 and 2018. It features a DOHC 16‑valve layout, Bosch common‑rail direct injection, and a variable geometry turbocharger (VGT). In standard form it delivered 147 kW (200 PS) and 450 Nm of torque, with strong mid‑range pull suited to performance‑oriented applications.
Fitted to models such as the Laguna III GT, Espace IV Initiale Paris, and Talisman—specifically the dCi 200 variants—the M9R 844 was engineered for brisk acceleration and refined highway cruising. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), meeting Euro 5b and later Euro 6 standards in select markets.
One documented concern is high-pressure fuel pump (HPFP) wear linked to insufficient lubrication from degraded oil, highlighted in Renault Service Information Bulletin NTM‑11‑2015. From mid‑2015, revised HPFP components and updated ECU calibration were introduced to improve durability and reduce injector coking.
Production years 2013–2014 meet Euro 5b standards; 2015–2018 models comply with Euro 6 in EU markets (VCA UK Type Approval #VCA/EMS/2014/9123).
The Renault M9R 844 is a 2,188 cc inline‑four turbo‑diesel engineered for executive sedans and premium MPVs (2013–2018). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver high torque and responsive performance. Designed to meet Euro 5b and Euro 6 emissions standards, it balances power output with regulatory compliance and fuel efficiency.
| 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 | 147 kW (200 PS) | |
| Torque | 450 Nm @ 2,000 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 5b (2013–2014); Euro 6 (2015–2018) | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Renault RN0710 / ACEA C2 (SAE 5W‑30) | |
| Dry weight | 187 kg |
The M9R 844 delivers brisk acceleration and smooth torque delivery but requires strict adherence to 15,000 km oil change intervals using RN0710/ACEA C2 oil to protect the CP4.2 high-pressure fuel pump. Extended oil life increases risk of camshaft lobe wear and HPFP seizure. The Bosch CP4.2 system is sensitive to fuel contamination and low-sulfur diesel quality per EN 590. Post-2015 units feature updated injector calibration and ECU logic to reduce coking. DPF regeneration must complete uninterrupted; frequent short trips may trigger limp mode.
Oil Specs: Requires Renault RN0710 or ACEA C2 (5W-30) specification (Renault SIB NTM‑11‑2015). Not backward-compatible with RN0700.
Emissions: Euro 5b applies to 2013–2014 builds; Euro 6 compliance confirmed for 2015–2018 EU-market engines (VCA Type Approval #VCA/EMS/2014/9123).
Power Ratings: Measured under ISO 1585 standards. Output consistent across all markets (Renault PT‑2016).
Renault Technical Information System (TIS): Docs M9R‑ENG‑01, M9R‑TURBO‑04, NTM‑11‑2015
VCA Type Approval Database (VCA/EMS/2014/9123)
ISO 1585: Road vehicles — Engine test code
The Renault M9R 844 was used across Renault's Laguna III GT, Espace IV, and Talisman platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced transmission mounts in the Talisman and revised exhaust manifolds in the Espace—and from 2015 the ECU/HPFP upgrade improved emissions and reliability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side engine block near the cylinder head flange (Renault TIS M9R‑ID‑01). The 7th VIN digit for Renault vehicles is '9' for M9R 844 applications. Pre-2015 units use Bosch EDC17C74 ECU; post-2015 Euro 6 variants use EDC17C84 with additional NOx sensors. Critical differentiation from M9R 830: M9R 844 has higher boost pressure (2.3 bar vs 2.1 bar), unique cam profile, and RN0710 oil requirement.
The M9R 844's primary reliability risk is high-pressure fuel pump (HPFP) wear, with elevated incidence in vehicles subjected to extended oil intervals or poor-quality diesel. Renault internal field data from 2016 indicated over 12% of pre-2015 engines required HPFP replacement before 100,000 km, while UK DVSA MOT records show DPF-related failures rising after 130,000 km in urban fleets. Aggressive driving and infrequent highway use accelerate both issues, making oil discipline and fuel quality critical.
Analysis derived from Renault technical bulletins (2013–2017) and UK DVSA failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-844.
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