The Renault G9T 700 is a 2,993 cc, V6 turbo‑diesel engine produced between 2007 and 2014. It features an aluminum block and heads, double overhead camshafts (DOHC), and a fixed — geometry turbocharger for robust low — end torque. Output is 173 kW (235 PS), with peak torque of 450 Nm, providing strong pulling power ideal for premium SUVs and executive vehicles.
Fitted primarily to the Renault Laguna GT and Vel Satis, the G9T 700 was engineered for refined performance and high — l…
Production years 2007–2014 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5677).
The Renault G9T 700 is a 2,993 cc V6 turbo‑diesel engineered for executive sedans and premium applications (2007-2014). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver smooth, high-torque performance and stable highway cruising. Designed to meet Euro 4 standards, it prioritizes refinement and load-carrying capacity.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,993 cc | |
Fuel type | Diesel | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 173 kW (235 PS) | |
Torque | 450 Nm @ 1,500 rpm | |
Fuel system | Siemens VDO common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single fixed‑geometry turbo (Garrett) | |
Timing system | Chain-driven | |
Oil type | Renault RN0700 (SAE 5W‑40) | |
Dry weight | 245 kg |
The Renault G9T 700 was used across Renault's Laguna and Vel Satis platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Laguna GT for high-speed stability-and no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The G9T 700's primary documented concern is high-pressure fuel pump failure, with incidence linked to fuel quality and lubrication issues. Renault internal service data indicates this was a notable cause for warranty claims, while owner reports frequently cite sudden engine stalling. Sustained high engine loads and infrequent oil changes increase failure risk, making fuel and oil quality critical.
Analysis derived from Renault technical bulletins (2007-2014) and owner-reported failure patterns. 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 G9T 700 is a powerful and refined V6 diesel, but its main weakness is the high-pressure fuel pump, which can fail prematurely if fuel or oil quality is poor. With proactive maintenance, especially using the correct oil and high-quality fuel, and addressing EGR/DPF warnings promptly, it can be a dependable engine for high-mileage use.
The most critical issue is high-pressure fuel pump failure, leading to stalling or no-start conditions. Other common problems include DPF regeneration faults, turbo actuator sticking, and injector seal leaks. These are well-documented in Renault's technical service bulletins.
The G9T 700 was primarily used in the third-generation Renault Laguna GT (2008-2014) in the dCi 235 variant. It was also fitted to the Renault Vel Satis (2007-2010) in the dCi 235 specification.
Yes, the G9T 700 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 260-280 PS and torque to 500-520 Nm. The engine's V6 internals are strong, but supporting modifications like a larger intercooler and upgraded clutch are recommended for higher stages to manage increased heat and torque.
Real-world fuel economy varies by model and driving style. In a Laguna GT dCi 235, expect around 8.5 L/100km (33 mpg UK) combined. Highway driving can yield figures closer to 7.0 L/100km (40 mpg UK). Aggressive driving will significantly reduce efficiency.
Yes. The G9T 700 is an interference engine. If the timing chain were to fail (though rare), the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the chain system is very durable with proper oil changes.
Renault mandates the use of RN0700 specification oil, typically a 5W-40 synthetic. This is non-negotiable for protecting the high-pressure fuel pump and turbocharger. Using the wrong oil will lead to premature component failure.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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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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