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—…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M9R 844 offers strong performance and refinement, but pre-2015 models are prone to CP4.2 fuel pump failure if oil changes are neglected. Post-2015 revisions improved HPFP durability and added Euro 6 compliance. Using RN0710/ACEA C2 oil and avoiding short trips greatly enhance longevity.
Top issues include CP4.2 high-pressure fuel pump wear, injector coking, DPF/SCR faults in Euro 6 variants, and turbo actuator failure. These are documented in Renault service bulletins NTM‑11‑2015 and NTM‑08‑2016, with clear OEM repair paths.
The M9R 844 powered the Laguna III GT (2013–2015), Espace IV Initiale Paris (2013–2015), Talisman (2015–2018), and European Nissan Qashqai+2 (2014–2016), all as the dCi 200 variant. It was not used in smaller models like Megane or Scénic.
Yes. Stage 1 ECU remaps typically yield +25–35 kW (34–47 PS) and +70–90 Nm safely, as the internals are robust. However, tuning increases stress on the HPFP and turbo, so upgraded fuel system and intercooler are recommended for sustained performance.
In a Talisman dCi 200, expect ~6.8 L/100km (city) and ~5.0 L/100km (highway), or about 45 mpg UK combined. Real-world mixed driving typically returns 40–48 mpg (UK), depending on driving style and DPF regeneration frequency.
Yes. The M9R series is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is generally reliable with proper maintenance.
Renault specifies SAE 5W‑30 oil meeting RN0710 or ACEA C2 standards. Using non-approved oil risks CP4.2 pump failure and increased injector coking. Change every 15,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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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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