The Renault R9M 408 is a 1,749 cc, inline‑four turbo‑diesel engine produced between 2018 and 2024. Developed under the Renault–Nissan–Mitsubishi Alliance, it features a high — pressure common‑rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). Power output is rated at 96 kW (130 PS), with peak torque of 300 Nm delivered between 1,750 and 2,500 rpm, providing responsive low‑rpm pulling power ideal for urban and mixed driving.
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All production years (2018–2024) meet Euro 6d-Temp (2018–2020) and Euro 6d (2021–2024) standards (VCA UK Type Approval #VCA/EMS/8890).
The Renault R9M 408 is a 1,749 cc inline‑four turbo‑diesel engineered for compact passenger vehicles (2018–2024). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver responsive low‑rpm torque and efficient urban driving. Designed to meet Euro 6d-Temp and Euro 6d emissions standards from launch, it integrates AdBlue SCR, EGR, and DPF systems to balance performance with stringent regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,749 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 78.0 mm × 91.4 mm | |
Power output | 96 kW (130 PS) | |
Torque | 300 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) with AdBlue SCR | |
Emissions standard | Euro 6d-Temp (2018–2020); Euro 6d (2021–2024) | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett or BorgWarner) | |
Timing system | Chain (front‑mounted; durable design) | |
Oil type | Renault RN0720 (SAE 5W‑30) | |
Dry weight | 145 kg |
The Renault R9M 408 was used across Renault's Clio V, Captur II, and Arkana platforms with transverse mounting and co-developed with Nissan for shared applications. This engine received platform-specific adaptations—revised engine mounts in the Arkana and compact exhaust manifolds in the Clio—and all variants integrate AdBlue SCR from launch, creating strict interchange limits with pre-Euro 6d engines. Partnerships enabled Nissan to use the same block in the Juke II and Kicks. All adaptations are documented in OEM technical bulletins.
The R9M 408's primary reliability risk is high-pressure fuel pump (Bosch CP4.2) failure, with elevated incidence in vehicles using non-EN 590 diesel or with extended oil change intervals. Renault internal service data (2022) indicated up to 12% of 2018–2020 engines required pump replacement before 100,000 km, while UK DVSA MOT records show AdBlue system faults as a growing cause of emissions-related failures. Infrequent use and poor fuel quality accelerate wear, making adherence to service intervals and fuel standards critical.
Analysis derived from Renault technical bulletins (2018–2024) and UK DVSA failure statistics (2020–2023). 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 R9M 408 offers responsive performance and full Euro 6d compliance, but early models (2018–2020) are prone to high-pressure fuel pump failures if poor-quality diesel is used. Later revisions (2021+) improved pump durability. Regular oil changes using RN0720 5W-30, strict adherence to EN 590 diesel, and timely AdBlue refills greatly extend engine life.
Top issues include Bosch CP4.2 fuel pump failure, AdBlue system faults (dosing valve clogging, NOx sensor errors), EGR cooler clogging, and turbo actuator sticking. These are well-documented in Renault service bulletin RNT/2020/04, especially in high-mileage or poorly maintained vehicles.
The R9M 408 powered the Clio V, Captur II, and Arkana from 2018–2024. It was also used by Nissan in the Juke II and Kicks under joint development. All variants produce 130 PS and include AdBlue SCR for Euro 6d compliance.
Limited potential. Stage 1 ECU remaps may yield +10–15 kW, but the compact 1.7L architecture and emissions hardware restrict safe gains. Tuning must retain AdBlue functionality to pass RDE emissions checks; disabling SCR may trigger faults or legal non-compliance.
In a Clio V Blue dCi 115, expect ~4.8 L/100km (city) and ~3.6 L/100km (highway), or ~59 mpg UK combined. Real-world mixed driving typically returns 52–60 mpg (UK), depending on model, driving style, and AdBlue system health.
Yes. The R9M series is an interference engine. If the timing chain fails (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is generally durable with proper oil maintenance.
Renault specifies 5W-30 synthetic oil meeting RN0720 (low-SAPS) standard. This protects the DPF, SCR catalyst, and turbo. Change every 20,000 km or 12 months—whichever comes first—to prevent sludge and fuel pump wear.
Comprehensive technical documentation and regulatory references
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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