The Renault M9R 805 is a 2,148 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a double overhead camshaft (DOHC) layout, common rail direct injection, and a variable geometry turbocharger (VGT). This engine was designed to offer a blend of strong low-end torque for effortless towing and refined highway cruising, with outputs ranging from 130 kW (177 PS) to 150 kW (204 PS) and peak torque of 380–400 Nm.
Fitted primarily to the Laguna III, Espace IV, and Latitude models, the M9R 805 was engineered for drivers prioritizing relaxed, long-distance comfort and load-carrying capability. Emissions compliance was managed through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), enabling most units to meet Euro 5 standards, with later variants achieving Euro 6 in specific markets.
A documented reliability concern involves the high-pressure fuel pump, which can suffer from premature wear, potentially leading to starting difficulties or power loss. This issue, referenced in Renault Technical Note MEC 02 15 A, is often attributed to fuel contamination or inadequate filtration. Around 2015, Renault implemented revised pump components for improved durability.
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models may have Euro 6 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault M9R 805 is a 2,148 cc inline‑four turbo‑diesel engineered for executive and MPV models (2010-2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong, linear torque and refined performance. Designed to meet Euro 5 (and some market‑specific Euro 6) standards, it balances power with long-distance efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,148 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 88.3 mm | |
| Power output | 130–150 kW (177–204 PS) | |
| Torque | 380–400 Nm @ 1,750–2,750 rpm | |
| Fuel system | Bosch CP4 common‑rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 (pre‑2015); Euro 6 depending on market | |
| Compression ratio | 15.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain | |
| Oil type | Renault RN0710 (SAE 5W‑30) | |
| Dry weight | 185 kg |
The VGT turbo provides strong, linear torque ideal for highway cruising and towing but demands strict adherence to 20,000 km oil change intervals to protect the turbo and timing chain. Renault RN0710 (5W-30) oil is critical for its specific additive package protecting the high-pressure fuel pump. The Bosch CP4 pump is highly sensitive to fuel contamination; only ultra-low-sulfur diesel (ULSD) meeting EN 590 standards should be used to prevent costly failures. DPF systems require regular long-distance driving cycles to regenerate effectively and avoid blockages. Revised fuel pump components were introduced circa 2015 per Renault Technical Note MEC 02 15 A.
Oil Specs: Requires Renault RN0710 (5W-30) specification (Renault Service Manual 77 11 296 805). Equivalent to ACEA C4.
Emissions: Euro 5 certification applies to pre-2015 models only (VCA Type Approval #VCA/EMS/5678). Some 2015-2018 models meet Euro 6 depending on market.
Power Ratings: Measured under SAE J1349 standards. 150 kW output requires EU5+ fuel quality (Renault Technical Note MEC 03 20).
Renault Technical Information System: Notes MEC 01 01, MEC 02 15 A, MEC 03 20
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Renault M9R 805 was used across Renault's Laguna/Espace platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts in the Espace for MPV duty-and from 2015 received emissions hardware updates for Euro 6 compliance in select markets, creating minor parts variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the front of the cylinder block, near the alternator (Renault Service Manual 77 11 296 805). The 8th digit of the VIN typically indicates engine power output ('G' for 175 PS, 'H' for 200 PS). Pre-2015 models have a silver engine cover; post-2015 Euro 6 units may have a black cover with additional emissions labeling. Critical differentiation from earlier M9R: The M9R 805 uses a Bosch EDC17C64 ECU. Service parts, particularly for the emissions system and fuel pump, require verification against the vehicle's production date and VIN due to mid-cycle updates (Renault Technical Note MEC 02 15 A).
The M9R 805's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel or exceeding service intervals. Renault internal reports indicated a notable failure rate before 150,000 km for neglected units, while UK DVSA records show DPF-related issues are common in vehicles used predominantly for short urban journeys. Fuel quality and strict adherence to maintenance schedules are critical for long-term reliability.
Analysis derived from Renault technical bulletins (2012-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-805.
Comprehensive technical documentation and regulatory references
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