The Renault M9R 750 is a 2,299 cc, inline‑four turbo‑diesel engine produced between 2015 and 2020. It features a dual overhead camshaft (DOHC) 16-valve design with a twin-scroll turbocharger and common rail direct injection. This configuration delivers 140 kW (190 PS) and 400 Nm of torque, with the twin-scroll turbo minimizing lag for strong, immediate throttle response.
Fitted to premium models like the Talisman and Espace V, the M9R 750 was engineered for refined, effortless performance and long-distance comfort. Emissions compliance was achieved through a diesel particulate filter (DPF), selective catalytic reduction (SCR) with AdBlue, and exhaust gas recirculation (EGR), meeting Euro 6 standards from launch.
One documented concern is AdBlue system crystallization and injector clogging, referenced in Renault Technical Note 7713C, often linked to infrequent use or low-quality AdBlue fluid causing deposits in the injector nozzle and supply lines. In 2017, Renault issued a software update and revised injector design to improve system robustness and reduce crystallization risk.
All production years (2015–2020) meet Euro 6b/c standards depending on model year (VCA UK Type Approval #VCA/EMS/5680).
The Renault M9R 750 is a 2,299 cc inline‑four turbo‑diesel engineered for executive sedans and MPVs (2015-2020). It combines common‑rail direct injection with a twin‑scroll turbocharger to deliver strong, immediate torque and refined cruising. Designed to meet Euro 6 standards, it balances high performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,299 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 94.6 mm | |
| Power output | 140 kW (190 PS) @ 3,750 rpm | |
| Torque | 400 Nm @ 2,000 rpm | |
| Fuel system | Denso HP4 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b/c | |
| Compression ratio | 14.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single twin‑scroll turbo (Garrett) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN0720 (SAE 5W‑30) | |
| Dry weight | 190 kg |
The twin-scroll turbo provides strong, immediate throttle response ideal for overtaking but requires strict adherence to 20,000 km oil change intervals to protect the turbo and timing chain. Renault RN0720 (5W-30) oil is critical due to its low-ash formulation protecting the DPF and SCR systems. Extended oil life can lead to turbo bearing wear and emissions system faults. The AdBlue system demands high-quality fluid (ISO 22241) and regular use to prevent crystallization; vehicles driven infrequently are at higher risk. Post-2017 models feature a revised injector; pre-2017 units should have the software update per Renault SIB 7713C.
Oil Specs: Requires Renault RN0720 (5W-30) specification (Renault SIB 7713C). Compatible with ACEA C4 standards.
Emissions: Euro 6b certification applies to 2015-2017 models; Euro 6c applies to 2018-2020 models (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across specified fuel grades (Renault TIS Doc. M9R-010).
Renault Technical Information System (TIS): Docs M9R-001, M9R-005, M9R-010
Renault Service Information Bulletin (SIB) 7713C
VCA Type Approval Database (VCA/EMS/5680)
The Renault M9R 750 was used across Renault's Talisman and Espace platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Espace for NVH refinement-and featured consistent ECU and emissions hardware for Euro 6 compliance. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Renault TIS M9R-002). The 8th VIN digit typically corresponds to the engine type ('R' for M9R series). Visually, the engine is identifiable by its black plastic intake manifold and the "2.3 dCi" badge on the engine cover. Critical differentiation from earlier M9R engines: The 750 variant features a twin-scroll turbocharger and an AdBlue injector mounted on the exhaust manifold. Service parts, particularly for the emissions system, require verification against the vehicle's production date and ECU software version (Renault SIB 7713C).
The M9R 750's primary reliability risk is AdBlue system crystallization and injector clogging, with elevated incidence in vehicles with infrequent use or low-quality fluid. Renault internal service data indicates this is a leading cause of emissions-related fault codes for this engine, while owner feedback frequently cites associated limp-mode activation. Adherence to fluid quality standards and preventative maintenance is critical.
Analysis derived from Renault technical bulletins (2016-2020) and aggregated owner-reported failure data (2018-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-750.
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