The Renault M9T 670 is a 2,298 cc, inline‑four turbo‑diesel engine produced between 2011 and 2023. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivered 120 kW (163 PS), with higher-output variants reaching 147 kW (200 PS) and torque figures between 360–450 Nm.
Fitted to models such as the Master III, Trafic III, and Alaskan, the M9T 670 was engineered for commercial durability, high low-end torque, and compliance with tightening emissions standards. Emissions control was achieved through cooled exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection from 2016 onward, enabling Euro 5 and Euro 6 compliance.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, highlighted in Renault Service Bulletin RSB‑15‑022. This issue is often linked to insufficient lubrication during cold starts and extended oil change intervals. From 2017, Renault introduced revised camshaft drive components and updated oil specifications to mitigate failure rates.
Production years 2011–2015 meet Euro 5 standards; 2016–2023 variants meet Euro 6 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9T 670 is a 2,298 cc inline‑four turbo‑diesel engineered for light commercial and utility platforms (2011–2023). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver high low‑rpm torque and robust load-carrying capability. Designed to meet Euro 5 through Euro 6 standards (depending on model year), it balances commercial utility with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,298 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 89.5 mm × 91.4 mm | |
| Power output | 120–147 kW (163–200 PS) | |
| Torque | 360–450 Nm @ 1,500–2,000 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 5 (2011–2015); Euro 6 (2016–2023) | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett or BorgWarner) | |
| Timing system | Chain (front‑mounted; durable design) | |
| Oil type | Renault RN0720 (ACEA C3, SAE 5W‑30) | |
| Dry weight | 215 kg |
The M9T 670 delivers high torque at low RPMs, ideal for heavy-load and stop-start commercial use, but requires strict adherence to 15,000 km oil change intervals using Renault RN0720 (5W‑30 ACEA C3) to protect the camshaft-driven high-pressure fuel pump. The Bosch CP4.2 pump is highly sensitive to fuel contamination—only ultra-low-sulfur diesel (EN 590) should be used. Euro 6 variants (2016+) require AdBlue fluid meeting ISO 22241 standards; low levels disable restart. Fuel pump drive wear is common after 150,000 km; post-2017 models use improved camshaft lobes per RSB‑15‑022.
Oil Specs: Requires Renault RN0720 (5W‑30, ACEA C3) specification (Renault SIB RSB‑11‑033). Not interchangeable with non-C3 oils.
Emissions: Euro 5 certification applies to 2011–2015 models only (VCA Type Approval #VCA/EMS/5678). Euro 6 (2016–2023) variants certified per market.
Power Ratings: Measured under ISO 1585 standards. 147 kW output requires EN 590 diesel with sulfur <10 ppm (Renault TIS M9T‑A210).
Renault Technical Information System (TIS): Docs M9T‑A201, M9T‑A205, RSB‑15‑022, RSB‑11‑033
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code
The Renault M9T 670 was used across Renault's Master III and Trafic III platforms with longitudinal mounting and co-developed with Nissan for shared LCV applications. This engine received platform-specific adaptations—reinforced oil pans in the Master and revised cooling in the Alaskan—and from 2016 the Euro 6 variants adopted SCR aftertreatment with AdBlue, creating interchange limits. Partnerships enabled Nissan's dCi 165/170/200 engines to share core architecture. 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‑A105). The 7th and 8th VIN digits indicate engine variant ('67' for M9T 670). Pre-2016 units have silver cam covers; Euro 6 models (2016+) feature black covers and AdBlue tank. Critical differentiation from M9T 650: M9T 670 uses Bosch EDC17C74 ECU with CP4.2 pump and SCR system. Fuel pump drive components differ before/after 2017—verify via production date (RSB‑15‑022).
The M9T 670's primary reliability risk is camshaft-driven high-pressure fuel pump wear, with elevated incidence in cold-climate commercial use and extended oil intervals. Renault internal data from 2018 indicated over 20% of pre-2017 engines required camshaft or pump replacement before 160,000 km, while UK DVSA MOT records show AdBlue/SCR system faults rising in high-mileage fleet examples. Extended oil intervals and low-quality diesel accelerate CP4.2 pump wear, making fuel quality and service adherence critical.
Analysis derived from Renault technical bulletins (2011–2023) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9T-670.
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