The Renault M9R 746 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2012 and 2018. It features a cast‑iron block, aluminum cylinder head, dual overhead camshafts (DOHC), and 16 valves. Power output is typically 130 kW (177 PS) with 380 Nm of torque, delivered via a common rail direct injection system and a variable‑geometry turbocharger.
Fitted to models like the Laguna III, Espace V, and Talisman, the M9R 746 was engineered for strong, refined performance and improved fuel efficiency, suiting executive and family vehicles. Emissions compliance for its production run was Euro 5, achieved through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) using AdBlue.
One documented reliability concern involves the high-pressure fuel pump, which can fail prematurely and lead to a no-start condition. This issue, referenced in Renault Technical Note MEC 0256, is often linked to fuel contamination or extended service intervals affecting pump lubrication.
Production years 2012–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/7890).
The Renault M9R 746 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and large vehicles (2012-2018). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong, linear torque and improved efficiency. Designed to meet Euro 5 standards, it balances performance with stricter 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 | 130 kW (177 PS) | |
| Torque | 380 Nm @ 1,750 rpm | |
| Fuel system | Common rail direct injection (Bosch) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable‑geometry turbo (Garrett) | |
| Timing system | Chain‑driven | |
| Oil type | Renault RN0710 (SAE 5W‑30) | |
| Dry weight | 198 kg |
The variable-geometry turbo provides strong, responsive torque across a wide rev range but requires strict adherence to 20,000 km oil change intervals using RN0710 (5W-30) to protect the high-pressure fuel pump and turbo bearings. Ultra-low sulfur diesel (ULSD) is mandatory to prevent injector and pump wear. The AdBlue system requires periodic refilling; neglect can trigger a torque reduction or no-start condition. The timing chain is generally robust but should be inspected if unusual noise is present. The EGR valve requires cleaning every 80,000-100,000 km to maintain performance.
Oil Specs: Requires Renault RN0710 (5W-30) specification (Renault Technical Note MEC 0256). Compatible with ACEA C4.
Emissions: Euro 5 certification applies to all 2012–2018 models (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under ECE R85 standards. Output is consistent across model range (Renault Group PT-2015).
Renault Technical Information System: Manuals 60R, Notes MEC 0256
VCA Type Approval Database (VCA/EMS/7890)
ECE Regulation No. 85 - Engine Power Measurement
The Renault M9R 746 was used across Renault's Laguna/Espace platforms with transverse mounting. This engine received platform-specific adaptations-different engine mounts for the Talisman-and featured minor ECU updates for emissions compliance, though core mechanicals remained unchanged. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the gearbox flange (Renault Technical Manual 60R). The 8th digit of the VIN typically corresponds to the engine code ('M' for M9R series). Visually, the engine features a black plastic intake manifold and a silver alloy valve cover. Critical differentiation from the earlier M9R 615: The M9R 746 has a higher power output (177 PS vs 150 PS) and incorporates an AdBlue dosing system with a urea tank and injector in the exhaust. Service parts like the high-pressure fuel pump are specific to the M9R 746.
The M9R 746's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles with poor fuel quality or extended service intervals. Renault internal data indicates pump replacement is a documented workshop procedure, while UK DVSA records show SCR/AdBlue system faults are a common cause of emissions-related failures. Using correct fuel and adhering to the RN0710 oil specification are critical to mitigate these risks.
Analysis derived from Renault technical bulletins (2012-2018) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-746.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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