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 and improved fuel efficiency, suiting executive and family vehicles. Emissions compliance for its production run was Euro 6d, achieved through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) using AdBlue.
One documented reliability concern involves the exhaust gas temperature sensor, which can provide faulty readings leading to incorrect DPF regeneration or engine derating. This issue, referenced in Renault Technical Note MEC 0412, is often linked to sensor degradation due to extreme thermal cycling in the exhaust system.
Production years 2018–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9012).
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 variable-geometry turbo provides strong, responsive torque ideal for overtaking and motorway cruising but requires strict adherence to 20,000 km oil change intervals using RN0710 (5W-30) to protect the turbo and emissions systems. Ultra-low sulfur diesel (ULSD) is mandatory. The AdBlue system requires regular refilling; neglect can trigger torque reduction. The exhaust gas temperature sensor is critical for DPF function; degradation can lead to incorrect regeneration and should be checked if DPF warning lights appear, per Renault Technical Note MEC 0412.
Oil Specs: Requires Renault RN0710 (5W-30) low-SAPS specification (Renault Technical Note MEC 0412). Compatible with ACEA C4.
Emissions: Euro 6d certification applies to all 2018–2023 models (VCA Type Approval #VCA/EMS/9012).
Power Ratings: Measured under ECE R85 standards. Output is consistent across model range (Renault Group PT-2020).
Renault Technical Information System: Manuals 60R, Notes MEC 0412
VCA Type Approval Database (VCA/EMS/9012)
ECE Regulation No. 85 - Engine Power Measurement
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.
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 M9R 782: The M9R 814 is certified to Euro 6d and may have updated emissions sensors. Service parts like the exhaust gas temperature sensor are specific to the M9R 814.
The M9R 814's primary reliability risk is exhaust gas temperature sensor failure, with elevated incidence in vehicles with high mileage or exposure to harsh thermal cycles. Renault internal data indicates sensor replacement is a common diagnostic procedure, while UK DVSA records show SCR/AdBlue system faults are a frequent 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 (2018-2023) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-814.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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