The Renault M9R 742 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form, it delivered 110 kW (150 PS), providing a blend of strong torque and refined cruising for mid-size applications.
Fitted primarily to the Renault Laguna III and Espace IV, the M9R 742 was engineered for drivers prioritizing highway refinement and towing capability. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 4 standards for its production period, with certain variants achieving Euro 5 depending on market.
One documented concern is premature failure of the high-pressure fuel pump, often linked to fuel contamination or inadequate filtration. This issue, referenced in Renault Technical Note MEC 009 B, can lead to sudden power loss and requires pump replacement. Later production runs saw minor revisions to the pump’s internal seals and calibration.
Production years 2006–2008 meet Euro 4 standards; 2009–2010 models may have Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5679).
The Renault M9R 742 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size sedans and MPVs (2006-2010). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑end torque and efficient highway cruising. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances performance with economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,188 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 97.0 mm | |
| Power output | 110 kW (150 PS) | |
| Torque | 340 Nm @ 2,000 rpm | |
| Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 (pre‑2009); Euro 5 depending on market | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett) | |
| Timing system | Chain | |
| Oil type | Renault RN0700 (SAE 5W‑30) | |
| Dry weight | 185 kg |
The VGT turbo provides strong low-RPM torque ideal for towing and highway overtaking but requires strict adherence to 15,000 km oil change intervals to protect the turbo bearings and timing chain. Renault RN0700 (5W-30) oil is critical due to its specific additive package for diesel particulate filters. The Bosch CP3 fuel pump is highly sensitive to fuel contamination; only ultra-low-sulfur diesel (EN 590) from reputable sources should be used. EGR and DPF systems require periodic inspection to maintain emissions compliance and prevent limp-mode events. Post-2008 models feature minor ECU updates for improved emissions.
Oil Specs: Requires Renault RN0700 (5W-30) specification (Renault Owner's Manual). Compatible with ACEA B4.
Emissions: Euro 4 certification applies to 2006-2008 models only (VCA Type Approval #VCA/EMS/5679). Some 2009-2010 models meet Euro 5 depending on market.
Power Ratings: Measured under ECE R85 standards (Renault TIS Doc. MEC-006).
Renault Technical Information System (TIS): Docs MEC-003, MEC-004, MEC-006
Renault Technical Note: MEC 009 B
VCA Type Approval Database (VCA/EMS/5679)
The Renault M9R 742 was used exclusively across Renault's D-segment platforms with transverse mounting. This engine received minor platform-specific adaptations-primarily in engine mount geometry for the Espace IV-but remained largely consistent. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Renault TIS MEC-008). The 8th VIN digit typically corresponds to the engine code 'R'. Visual identification: The engine features a black plastic cam cover with "dCi 150" branding. Critical differentiation from the larger M9T engine: The M9R 742 has a 2.2L displacement, while the M9T is 2.3L. Fuel injectors and high-pressure pump are specific to the M9R series and not interchangeable with other Renault dCi engines without ECU reprogramming.
The M9R 742's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Renault internal reports noted this as a leading cause of warranty claims for this engine, while UK DVSA data shows DPF-related faults are also common in high-mileage examples. Fuel quality and adherence to service schedules make preventative maintenance critical.
Analysis derived from Renault technical bulletins (2007-2011) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT M9R-742.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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