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, Alaskan, and Espace V, including variants like the dCi 190, the M9T 870 was designed for operators requiring brisk acceleration, refined motorway cruising, and robust towing performance. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), enabling Euro 6d TEMP compliance from launch.
One documented concern is premature wear of the dual-mass flywheel under frequent stop-start or high-torque load conditions, which can manifest as driveline shudder or clunking during gear engagement. This issue, highlighted in Renault Technical Note NT 1892‑F, stems from thermal and torsional stress on the original flywheel design. From 2021, Renault introduced a reinforced flywheel with improved damping and heat shielding.
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 M9T 870 delivers high torque ideal for commercial and towing applications but requires strict adherence to 20,000 km oil change intervals using Renault RN0710 (5W-30) to protect the Bosch CP4.2 high-pressure fuel pump and aftertreatment systems. Urban delivery cycles with frequent short trips accelerate dual-mass flywheel wear and DPF clogging. Ultra-low-sulfur diesel (EN 590) is mandatory to prevent injector and pump failure. Post-2021 engines feature an upgraded flywheel per Renault NT 1892-F; pre-2021 units should be inspected for driveline vibration. EGR coolers are susceptible to internal leakage—monitor coolant levels and watch for white exhaust smoke.
Oil Specs: Requires Renault RN0710 (5W-30) specification (Renault SIB NT 1892-F). Equivalent to ACEA C2/C3 but with OEM-specific additive package for Euro 6 compatibility.
Emissions: Euro 6d TEMP certification applies to all 2018–2024 models (VCA Type Approval #VCA/EMS/8912). No earlier emissions variants exist for M9T 870.
Power Ratings: Measured under ISO 1585 standards. Output consistent across all markets (Renault TIS Doc. M9T-B201).
Renault Technical Information System (TIS): Docs M9T-B102, M9T-B105, NT 1892-F, NT 1402-11
VCA Type Approval Database (VCA/EMS/8912)
ISO 1585: Road vehicles — Engine test code
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.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Renault TIS M9T-B110). The 7th VIN digit for Renault models is 'U' for M9T 870 applications. Pre-2021 engines use a black dual-mass flywheel with single heat shield; post-2021 units feature a silver flywheel with dual shielding. Critical differentiation from M9T 672: M9T 870 uses Bosch EDC17C74 ECU with Euro 6d TEMP calibration and produces 190 PS. Service parts for flywheel, DPF, and EGR require production date verification—units before 01/2021 use different part numbers (Renault NT 1892-F).
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.
Find answers to most commonly asked questions about RENAULT M9T-870.
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