The Renault M9R 722 is a 2,464 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features a dual overhead camshaft (DOHC) layout, common rail direct injection, and a variable geometry turbocharger (VGT), delivering outputs of 127 kW (173 PS) and 360 Nm of torque. The high — pressure common rail system enables precise fuel metering for strong low — rpm torque and responsive power delivery.
Fitted primarily to the Laguna III (B96) and Espace IV (JK0/1) mo…
All production years (2006–2010) meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Renault M9R 722 is a 2,464 cc inline‑four turbo‑diesel engineered for mid‑size sedans and MPVs (2006-2010). It combines DOHC architecture with a variable geometry turbocharger to deliver strong low‑end torque and smooth power delivery. Designed to meet Euro 4 emissions standards, it balances performance with refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,464 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.0 mm × 100.0 mm | |
Power output | 127 kW (173 PS) @ 4,000 rpm | |
Torque | 360 Nm @ 2,000 rpm | |
Fuel system | Common rail direct injection (Bosch) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable geometry turbo (VGT) | |
Timing system | Chain-driven | |
Oil type | Renault RN0700 or RN0710 (SAE 5W-30/5W-40) | |
Dry weight | 185 kg |
The Renault M9R 722 was used across Renault's B96/JK0 platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Espace IV for NVH control-and no significant facelift revisions that affect major component interchange. All adaptations are documented in OEM technical bulletins.
The M9R 722's primary reliability risk is variable geometry turbocharger (VGT) actuator failure, with elevated incidence in vehicles with high mileage or irregular maintenance. Renault internal data indicates this is a frequent cause of drivability complaints for this engine, while owner feedback highlights EGR valve clogging. Using non-specification oil or neglecting highway driving for DPF regeneration significantly increases the risk of these failures.
Analysis derived from Renault technical bulletins (2008-2012) and owner-reported failure data (2013-2023). 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 722 is a robust engine with a strong reputation for torque and durability. Its main weakness is the VGT actuator, which can fail with high mileage or poor maintenance. With strict adherence to using RN0700/RN0710 oil, 15,000 km service intervals, and regular highway driving for DPF regeneration, it can be very reliable long-term.
The most frequent issues are VGT actuator failure, EGR valve and cooler clogging, and DPF regeneration problems. Oil leaks from the turbocharger seals are also common on higher-mileage examples. These are well-documented in Renault service bulletins and owner forums.
This 2.5L diesel engine was used in the Renault Laguna III (2006-2010) and the Renault Espace IV (2006-2010). It was typically found in higher trim levels like Privilege and GT, paired with either a 6-speed manual or 6-speed automatic transmission.
Yes, the M9R responds well to tuning. ECU remaps can safely increase power by 20-30 kW and torque by 50-80 Nm. The stock internals are strong enough to handle this. More significant power requires upgraded turbos and injectors. Always ensure the clutch and transmission can handle the increased torque.
Expect combined fuel economy of around 7.5-8.5 L/100km (38-33 mpg UK) in real-world driving. The official NEDC figure for the Laguna III 2.5 dCi GT manual was 7.3 L/100km. Economy is heavily influenced by driving style, with DPF regeneration cycles and short trips reducing efficiency.
Yes. The M9R 722 is an interference engine. If the timing chain were to fail (which is rare but possible with extreme neglect), the pistons would collide with the open valves, causing catastrophic internal engine damage requiring a full rebuild or replacement.
Renault mandates RN0700 or RN0710 specification oil, typically in 5W-30 or 5W-40 viscosity. This low-ash oil is crucial for protecting the DPF. Using ACEA B4 oil is the absolute minimum. Change intervals should not exceed 15,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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GOV.UK: Vehicle Approval
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