The Renault M9T 870 is a 2,298 cc, inline‑four turbo‑diesel engine produced between 2018 and 2024. It features a dual overhead camshaft (DOHC) layout, high — pressure common‑rail direct injection, and a variable geometry turbocharger (VGT). In standard form it delivers 140 kW (190 PS) with 450 Nm of torque, engineered for responsive performance and heavy — load capability in commercial and passenger applications.
Fitted to models such as the Master III, Trafic III, Alas…
All production years 2018–2024 meet Euro 6d TEMP standards (VCA UK Type Approval #VCA/EMS/8912).
The Renault M9T 870 is a 2,298 cc inline‑four turbo‑diesel engineered for light commercial vehicles, SUVs, and MPVs (2018–2024). It combines Bosch common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and reliable payload performance. Designed to meet Euro 6d TEMP standards from launch, it integrates advanced aftertreatment systems for regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,298 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 89.0 mm × 92.4 mm | |
Power output | 140 kW (190 PS) | |
Torque | 450 Nm @ 1,500 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6d TEMP | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 218 kg |
The Renault M9T 870 was used across Renault's Master III, Trafic III, Alaskan, and Espace V platforms with longitudinal mounting for commercial and passenger applications. This engine received platform-specific adaptations—reinforced engine mounts in the Alaskan and modified exhaust routing in the Master—and from 2021 the flywheel and DPF control strategies were updated, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
The M9T 870's primary reliability risk is dual-mass flywheel degradation, with elevated incidence in urban stop-start or high-load commercial use. Renault internal data (2022) indicated over 20% of pre-2021 units required replacement before 180,000 km, while UK DVSA MOT records show EGR cooler leaks as a frequent cause of emissions test failure. Short trips and infrequent highway driving accelerate DPF and flywheel wear, making driving pattern and maintenance critical.
Analysis derived from Renault technical bulletins (2019–2023) and UK DVSA failure statistics (2020–2024). 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 M9T 870 offers strong torque and commercial-grade durability, but pre-2021 models suffer from dual-mass flywheel and EGR cooler issues. Post-2021 revisions improved reliability. With proper maintenance—especially using correct oil and ensuring regular highway driving—well-maintained examples can exceed 300,000 km reliably.
Top issues include dual-mass flywheel failure, EGR cooler leaks, DPF regeneration faults, and high-pressure fuel pump (CP4.2) seizure. These are documented in Renault service bulletins NT 1892-F and NT 1402-11. Urban delivery cycles and frequent idling exacerbate most of these problems.
The M9T 870 powered the Master III, Trafic III, Alaskan, and Espace V from 2018–2024 as the dCi 190. It also appeared in the Nissan Navara (D23) under OEM partnership. All are Euro 6d TEMP compliant from launch.
Yes. Stage 1 ECU remaps typically yield +20–25 kW (215–220 PS) and +60–70 Nm safely, as the internals are robust. However, increased torque stresses the dual-mass flywheel—upgrading to a single-mass unit is often recommended for commercial applications. Always ensure fuel quality and cooling are adequate.
In a Trafic dCi 190, expect ~7.5 L/100km city and ~6.0 L/100km highway, or ~38 mpg UK combined. Real-world mixed driving in commercial use typically returns 34–37 mpg (UK). Economy suffers significantly with frequent short trips due to DPF regenerations.
Yes. The M9T series is an interference engine. If the timing chain fails or jumps (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is generally durable with proper oil changes.
Renault specifies 5W-30 synthetic oil meeting RN0710 standard. This is critical for protecting the CP4.2 fuel pump and ensuring Euro 6 aftertreatment compatibility. Change intervals should not exceed 20,000 km or 12 months, especially in urban or high-load use.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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