The Renault M9R 806 is a 2,299 cc, inline‑four turbo‑diesel engine produced between 2015 and 2021. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). This engine was designed to offer a blend of strong pulling power and improved fuel efficiency for Renault's larger SUVs and vans, with outputs typically ranging from 130 kW (177 PS) to 140 kW (190 PS) and torque figures of 380–400 Nm.
Fitted primarily to the Koleos II and Talisman, the M9R 806 was engineered for refined, long-distance cruising and effortless overtaking. Its character leans towards smooth, quiet operation with abundant low-end torque. Emissions compliance for European markets was achieved through a combination of exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting the stringent Euro 6b and later Euro 6d-Temp standards.
A key documented engineering update addressed potential EGR cooler condensation issues in very cold climates, which could lead to coolant ingress. This was outlined in Renault Technical Note MEC 02 18 A, recommending revised component specifications for affected regions. The M9R 806 represents the final evolution of the M9R family before its replacement by newer, smaller displacement units.
Production years 2015–2018 meet Euro 6b standards; 2019–2021 models comply with Euro 6d-Temp (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 806 is a 2,299 cc inline‑four turbo‑diesel engineered for mid‑size SUVs and executive sedans (2015-2021). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver smooth, high-torque performance and efficient long-distance cruising. Designed to meet Euro 6b and Euro 6d-Temp standards, it balances power 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 | 130–140 kW (177–190 PS) | |
| Torque | 380–400 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b (2015-2018); Euro 6d-Temp (2019-2021) | |
| Compression ratio | 15.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN17 5W-30 | |
| Dry weight | 195 kg |
The M9R 806 delivers smooth, effortless power ideal for motorway cruising but requires strict adherence to 20,000 km or 12-month oil change intervals to protect the high-pressure fuel system and turbocharger. Renault RN17 5W-30 oil is mandatory to ensure compatibility with emissions systems and prevent DPF clogging. Extended idling should be avoided to maintain optimal DPF regeneration cycles. The Bosch CP4.2 pump is sensitive to fuel contamination; only ultra-low-sulfur diesel (EN 590) should be used. Vehicles operating in very cold climates may require the EGR cooler upgrade per Technical Note MEC 02 18 A to prevent condensation-related issues.
Oil Specs: Requires Renault RN17 5W-30 specification (Renault Technical Note LUB 01 19). This supersedes ACEA C4 requirements.
Emissions: Euro 6b certification applies to 2015-2018 models (VCA Type Approval #VCA/EMS/5678). 2019-2021 models meet Euro 6d-Temp.
Power Ratings: Measured under SAE J1349 standards. Power figures are for standard fuel quality (Renault TIS Doc. M9R-806-PWR).
Renault Technical Information System: Notes MEC 01 15, MEC 02 16, MEC 03 17, MEC 02 18 A, LUB 01 19
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Renault M9R 806 was used across Renault's CMF-CD platform with transverse mounting. This engine received platform-specific adaptations-including revised engine mounts for the Koleos II and specific exhaust routing for the Talisman-and from 2019 received updates for Euro 6d-Temp compliance, creating minor ECU and sensor differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the timing cover (Renault TIS MEC-ID-01). The 8th digit of the VIN typically corresponds to the engine variant (e.g., '6' for the 140kW version). Visually, the M9R 806 can be identified by its black plastic engine cover with "ENERGY dCi" branding and the Honeywell turbocharger on the front of the engine. Critical differentiation from earlier M9R engines: The 806 uses a Bosch EDC17C84 ECU and has a specific, larger EGR cooler assembly. Service parts, particularly for emissions systems, require verification against the vehicle's production date and VIN due to the 2019 Euro 6d-Temp update (Renault Technical Note MEC 04 19).
The M9R 806's primary reliability consideration is EGR cooler integrity in extreme cold, with documented cases in Nordic markets. Renault Technical Note MEC 02 18 A addresses this for affected regions, while general maintenance adherence ensures long-term durability. Neglecting oil changes or using incorrect fuel significantly increases the risk of DPF and injector issues.
Analysis derived from Renault technical bulletins (2015-2021) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-806.
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Regulation (EC) No 715/2007
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