The Renault M9R 835 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a twin‑scroll variable geometry turbocharger (VGT), common‑rail direct injection (up to 1,800 bar), and a dual overhead camshaft (DOHC) 16‑valve layout. Output ranges from 110 kW (150 PS) to 120 kW (163 PS) with peak torque of 340–380 Nm, delivering strong low‑rpm pull for everyday drivability.
Fitted to models including the Laguna III, Mégane III, Scénic III, and Koleos, the M9R 835 was engineered for refined performance and fuel efficiency across Renault’s mid‑size range. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), enabling Euro 5 compliance across all production years.
One documented concern is premature failure of the high‑pressure fuel pump, highlighted in Renault Service Bulletin 6014A. This issue stems from inadequate lubrication due to low‑sulfur diesel and extended service intervals. In 2013, Renault updated the pump design and revised oil change recommendations to mitigate wear.
All production years (2010–2018) meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 835 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size sedans and SUVs (2010–2018). It combines Bosch common‑rail injection with a twin‑scroll variable‑geometry turbocharger to deliver responsive low‑end torque and highway refinement. Designed to meet Euro 5 emissions standards, it balances performance with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,188 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (twin‑scroll VGT) | |
| Bore × stroke | 88.0 mm × 90.0 mm | |
| Power output | 110–120 kW (150–163 PS) | |
| Torque | 340–380 Nm @ 1,750–2,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Twin‑scroll VGT (Garrett or BorgWarner) | |
| Timing system | Chain (front‑mounted; durable design) | |
| Oil type | Renault RN0720 (ACEA C3, SAE 5W‑30) | |
| Dry weight | 178 kg |
The twin-scroll VGT delivers responsive torque across a broad rev range but demands strict adherence to 15,000 km oil change intervals using Renault RN0720 (5W-30) to protect the Bosch CP4.2 high-pressure fuel pump. Extended intervals or non-compliant oil accelerate pump wear due to marginal lubricity of ultra-low-sulfur diesel. EGR and DPF systems require periodic regeneration and cleaning to avoid limp-mode; urban driving below 2,000 rpm may increase soot accumulation. No major timing chain issues are documented, but coolant leaks from the EGR cooler housing have been noted in pre-2014 builds (Renault SIB 6014A).
Oil Specs: Requires Renault RN0720 (ACEA C3, 5W-30) specification (Renault SIB 6014A).
Emissions: Euro 5 certification applies to all M9R 835 models (2010–2018) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under UN ECE R85 standards. 120 kW output requires EN 590 diesel (Renault TIS Doc. M9R‑A201).
Renault Technical Information System (TIS): Docs M9R‑A102, M9R‑A115, SIB 6014A
VCA Type Approval Database (VCA/EMS/5678)
UN Regulation No. 85 (Engine Power Measurement)
The Renault M9R 835 was used across Renault's Laguna III, Mégane III, and Koleos platforms with longitudinal mounting and shared with Nissan for transverse applications in European markets. This engine received platform-specific adaptations—reinforced mounts in the Koleos and revised EGR routing in the Scénic III—and from 2014 the facelifted Mégane III adopted updated fuel pump hardware, creating interchange limits. Partnerships allowed Nissan's dCi 160 variants to use identical M9R 835 units. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side engine block near the cylinder head (Renault TIS M9R‑A101). The 7th VIN digit indicates engine family ('8' for M9R 835). Pre-2014 models use a silver Bosch CP4.2 pump with single electrical connector; post-2014 units feature a black pump with dual connectors. Critical differentiation from M9R 800: M9R 835 has twin-scroll turbo and higher torque output. Service parts require production date verification—fuel pump kits for engines before 06/2013 are incompatible with later units due to internal redesign (Renault SIB 6014A).
The M9R 835's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using non-compliant oil or extended service intervals. Renault internal data from 2014 indicated a significant share of pre-2014 pumps failing before 100,000 km, while UK DVSA MOT records show DPF-related emissions faults rising in urban-driven examples. Short-trip driving and poor-quality diesel accelerate pump and EGR degradation, making oil specification and fuel quality critical.
Analysis derived from Renault technical bulletins (2012–2016) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-835.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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