The Renault M9R 814 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a cast‑iron block, aluminum cylinder head, dual overhead camshafts (DOHC), and 16 valves. Power output is typically 150 kW (204 PS) with 400 Nm of torque, delivered via a common rail direct injection system and a variable‑geometry turbocharger.
Fitted to models like the Espace V, Talisman, and Koleos II, the M9R 814 was engineered for strong, refined performance…
Production years 2018–2023 meet Euro 6d standards .
The Renault M9R 814 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and large vehicles (2018-2023). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong, linear torque and improved efficiency. Designed to meet Euro 6d standards, it balances performance with the strictest 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 | 150 kW (204 PS) | |
Torque | 400 Nm @ 1,750 rpm | |
Fuel system | Common rail direct injection (Bosch) | |
Emissions standard | Euro 6d | |
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 | 202 kg |
The Renault M9R 814 was used across Renault's Espace/Talisman platforms with transverse mounting. This engine received platform-specific adaptations-different engine mounts for the Koleos-and featured minor ECU updates for emissions compliance, though core mechanicals remained unchanged. 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M9R 814 is a powerful and efficient Euro 6d engine. Its main documented issues are with the exhaust gas temperature sensor and the AdBlue system. With strict adherence to maintenance schedules, using RN0710 (5W-30) oil and high-quality diesel, the engine can be very reliable. Proactive cleaning of the EGR system and timely AdBlue refills are crucial for long-term trouble-free operation.
The most frequent issues are exhaust gas temperature sensor failure, AdBlue system faults (clogged injectors, sensor failures), EGR valve clogging, and turbocharger actuator failure. These are well-documented in Renault service bulletins and are common repair items for diesel specialists working on Euro 6d vehicles.
The M9R 814 was the high-output 2.2 dCi diesel engine for the later models of the Renault Espace V (2018-2023), Talisman (2018-2023), and Koleos II (2018-2023). It represented the final evolution of the M9R engine family, meeting the stringent Euro 6d emissions standards.
Aftermarket ECU tuning is common on the M9R-814 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.
Fuel economy is very good for its power output. Expect around 6.8 L/100km (42 mpg UK) in mixed driving in a Talisman, and up to 4.8 L/100km (59 mpg UK) on a steady highway run. Combined figures typically range from 44-49 mpg UK, depending on the vehicle, driving style, and condition of the emissions systems.
Yes. The M9R 814 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 engine damage. This highlights the importance of using the correct oil and addressing any timing chain noise immediately.
Renault mandates the use of RN0710 specification oil, typically a 5W-30 low-SAPS (low ash) synthetic. This specific oil is crucial for protecting the emissions systems (DPF, SCR) and the turbocharger. Always change the oil and filter at the recommended intervals (typically 20,000 km or annually) to prevent sludge and component wear.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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