The Renault M9R 859 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2016 and 2021. It features common‑rail direct injection, a variable geometry turbocharger (VGT), dual overhead camshafts (DOHC), and a wall‑flow diesel particulate filter (DPF). Power output is rated at 130 kW (177 PS) with peak torque of 380 Nm, delivered via a Bosch EDC17C74 engine control unit.
Fitted to models such as the Talisman, Mégane IV, and Koleos II, the M9R 859 was engineered fo…
Production years 2016–2017 meet Euro 6b standards; 2018–2021 models comply with Euro 6d‑TEMP (VCA UK Type Approval #VCA/EMS/9012).
The Renault M9R 859 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and SUV platforms (2016–2021). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and smooth highway performance. Designed to meet Euro 6b and Euro 6d‑TEMP emissions, it integrates advanced aftertreatment for compliance.
| 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 | 130 kW (177 PS) | |
Torque | 380 Nm @ 2,000 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 6b (2016–2017); Euro 6d‑TEMP (2018–2021) | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0720 (SAE 5W‑30) | |
Dry weight | 180 kg |
The Renault M9R 859 was used across Renault's CMF‑CD platform with transverse mounting and shared with Nissan for European applications. This engine received platform-specific adaptations—reinforced engine mounts in the Koleos II and revised exhaust manifolding in the Talisman—and from 2018 the updated Mégane IV retained the same engine code but with refined ECU calibration for RDE compliance, creating minor software interchange limits. Partnerships allowed Nissan's dCi 180 units to leverage Renault's common-rail architecture. All adaptations are documented in OEM technical bulletins.
The M9R 859's primary reliability risk is high-pressure fuel pump (HPFP) drive gear wear, with elevated incidence in short-trip urban use. Renault internal quality reports from 2019 indicated a notable share of pre-early-2018 engines requiring HPFP replacement before 100,000 km, while UK DVSA MOT data links DPF regeneration failures to frequent stop-start driving. Cold starts and infrequent oil changes accelerate wear, making oil spec and interval adherence critical.
Analysis derived from Renault technical bulletins (2016–2021) and UK DVSA failure statistics (2015–2023). 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 859 offers strong torque and smooth operation, but early models (2016–early 2018) are prone to HPFP drive gear wear. Later revisions (post-early 2018) improved oiling and durability. With strict adherence to 15,000 km oil changes using RN0720 oil, well-maintained examples can exceed 200,000 km reliably.
Top issues include HPFP drive gear failure, DPF clogging from short trips, EGR valve/cooler fouling, and turbo actuator sticking. These are documented in Renault SIB 6057C and TIS bulletins. Regular oil changes and proper driving cycles mitigate most risks.
The M9R 859 powered the Talisman (2016–2021), Mégane IV (2016–2021), and Koleos II (2016–2021) in dCi 160/180 variants. Nissan also used it in the X-Trail (2016–2021) as the dCi 180. Early models meet Euro 6b; 2018+ units comply with Euro 6d‑TEMP.
Yes. Stage 1 ECU remaps typically yield +20–30 kW safely, as the internals handle torque well. Supporting upgrades (intercooler, DPF delete in off-road use) can enable higher outputs. However, HPFP reliability must be addressed—especially on pre-early-2018 units—before aggressive tuning.
In a Mégane IV dCi 180, expect ~6.3 L/100km city and ~4.6 L/100km highway, or ~46 mpg UK combined. Real-world mixed driving typically yields 43–49 mpg (UK). Economy suffers significantly with frequent short trips due to DPF regeneration demands.
Yes. The M9R series is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. While chain life is generally robust, any unusual noise warrants immediate inspection.
Renault specifies 5W-30 synthetic oil meeting RN0720 standard. This is critical for HPFP lubrication and chain longevity. Always use OEM-approved oil and change every 15,000 km or annually—whichever comes first.
Comprehensive technical documentation and regulatory references
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