The Renault M9R 748 is a 2,148 cc, inline‑four turbo‑diesel engine produced between 2012 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and a single variable geometry turbocharger (VGT) for responsive low — end torque. In its primary 120 kW (163 PS) tune, it produces 380 Nm, positioning it as the higher — output variant within the M9R family for performance — oriented applications.
Fitted to premium variants of the Laguna III, Latitude, and Talisman, the M…
Production years 2012–2014 meet Euro 5 standards; 2015–2018 models meet Euro 6 compliance depending on market .
The Renault M9R 748 is a 2,148 cc inline‑four turbo‑diesel engineered for premium sedans and executive vehicles (2012-2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong, accessible torque and confident highway performance. Designed to meet Euro 5 and Euro 6 standards, it balances elevated power output with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,148 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 95.0 mm | |
Power output | 120 kW (163 PS) @ 4,000 rpm | |
Torque | 380 Nm @ 1,750 rpm | |
Fuel system | Denso HP4 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (2012–2014); Euro 6 (2015–2018) | |
Compression ratio | 15.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain-driven | |
Oil type | Renault RN0720 (SAE 5W‑30) | |
Dry weight | 168 kg |
The Renault M9R 748 was used across Renault's Laguna III and Talisman platforms with transverse mounting. This engine received platform-specific adaptations-slightly different exhaust routing for the Latitude-but no major facelift revisions affecting core compatibility occurred during its production run. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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Aftermarket ECU tuning is common on the M9R-748 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
The most frequent issues are turbocharger VGT actuator failure (causing loss of power), EGR valve/carbon buildup, DPF regeneration problems (often from short trips), and high-pressure fuel pump failure. These are well-documented in Renault service bulletins and are common across many modern diesel engines.
The M9R 748 2.1L dCi 163 engine was used in the Renault Laguna III (2012-2015), Latitude (2012-2015), and Talisman (2015-2018). It was typically the top-tier diesel option in these models, positioned above the 150 PS variants, and found in higher trim levels like Initiale and GT Line.
Aftermarket ECU tuning is common on the M9R-748 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Real-world fuel economy is good considering its power output. Expect around 7.5 L/100km (38 mpg UK) in combined driving for a Talisman or Latitude. Highway cruising can see figures closer to 6.0 L/100km (47 mpg UK), while city driving may be 9.5 L/100km (30 mpg UK) or higher, depending on traffic and driving style.
Yes. The M9R 748 is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the timing chain is very robust and rarely fails if the engine is properly maintained.
Renault specifies RN0720 specification oil, typically SAE 5W-30 viscosity. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is crucial for protecting the DPF and ensuring the longevity of the turbocharger and fuel system. Oil should be changed every 20,000 km or annually.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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