The Renault M9R 834 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features common‑rail direct injection, a variable geometry turbocharger (VGT), dual overhead camshafts (DOHC), and a diesel particulate filter (DPF). Power output ranges from 110 kW (150 PS) to 120 kW (163 PS) with torque figures of 340–380 Nm.
Fitted to models such as the Laguna III, Mégane III, Scénic III, and Koleos, the M9R 834 was engineered for refined cruising, strong low‑end torque, and compliance with Euro 5 emissions. Emissions control is achieved through exhaust gas recirculation (EGR), a DPF, and oxidation catalysts.
One documented concern is premature wear of the high‑pressure fuel pump drive gear, highlighted in Renault Service Bulletin 6057A. This issue stems from insufficient lubrication under frequent short‑trip operation. From 2013 onward, Renault introduced a reinforced pump drive and updated camshaft oiling passages.
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models may have Euro 6 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 834 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and SUV platforms (2010–2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and smooth highway performance. Designed to meet Euro 5 (and select Euro 6) standards, it balances drivability with emissions 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 | 110–120 kW (150–163 PS) | |
| Torque | 340–380 Nm @ 2,000 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 (pre‑2015); Euro 6 depending on market | |
| 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 | 178 kg |
The M9R 834 delivers smooth, torque‑rich performance ideal for motorway cruising but requires strict adherence to 15,000 km oil change intervals using RN0720‑spec oil to protect the high‑pressure fuel pump and timing chain. Ultra‑low‑sulfur diesel (EN 590) is mandatory to prevent CP4.2 pump seizure. Frequent short trips increase carbon buildup in the EGR and DPF, necessitating periodic regeneration or cleaning. Post‑2013 engines include an updated camshaft oil feed to the fuel pump drive gear per Renault SIB 6057A.
Oil Specs: Requires Renault RN0720 (5W-30) specification (Renault SIB 6057A). Equivalent to ACEA C4 but with OEM-specific additives.
Emissions: Euro 5 certification applies to pre-2015 models only (VCA Type Approval #VCA/EMS/5678). Some 2015–2018 models meet Euro 6 depending on market.
Power Ratings: Measured under SAE J1349 standards. 120 kW output requires EN 590 diesel with sulfur <10 ppm (Renault TIS Doc. R89015).
Renault Technical Information System (TIS): Docs R88210, R88305, SIB 6057A
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Renault M9R 834 was used across Renault's Laguna III/Mégane III 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 exhaust routing in the Scénic III—and from 2015 the facelifted Mégane IV adopted the M9R Gen 3 with dual-loop EGR, creating interchange limits. Partnerships allowed Nissan's dCi 160 units to leverage Renault's common-rail 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 R88220). The 7th VIN digit indicates engine family ('8' for M9R 834). Pre-2013 units have a silver cam cover with a single oil feed to the HPFP; post-2013 models use a black cam cover with dual oil feeds. Critical differentiation from M9R 846: M9R 834 uses Bosch EDC17C74 ECU with rectangular diagnostic port under bonnet, while M9R 846 uses Continental ECU. Service parts require production date verification—fuel pump drive gears before 06/2013 are incompatible with later camshafts due to oiling redesign (Renault SIB 6057A).
The M9R 834'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 2014 indicated a notable share of pre-2013 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 (2012–2017) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-834.
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