The Renault G9T 702 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2005 and 2010. It features a cast‑iron block, aluminium cylinder head, double overhead camshafts (DOHC), and a variable geometry turbocharger (VGT). Power output ranged from 110 kW (150 PS) to 127 kW (173 PS), with torque figures between 340–360 Nm, providing strong pulling power for its class.
Fitted primarily to the Laguna III and Espace IV platforms, including variants like the 2.2 dCi…
Production years 2005–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5683).
The Renault G9T 702 is a 2,188 cc inline‑four turbo‑diesel engineered for mid-size sedans and MPVs (2005-2010). It combines a Bosch common‑rail fuel system with a single variable‑geometry turbocharger to deliver strong low‑end torque and efficient highway cruising. Designed to meet Euro 4 standards, it balances performance with emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 94.0 mm | |
Power output | 110–127 kW (150–173 PS) | |
Torque | 340–360 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑40) | |
Dry weight | 185 kg |
The Renault G9T 702 was used across Renault's Laguna III and Espace IV platforms with transverse mounting. This engine received platform-specific adaptations-unique engine mounts for the Espace's raised ride height-and no significant facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The G9T 702's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles with neglected fuel filter changes. Renault internal reports indicated a significant correlation between pump failures and fuel contamination, while owner data suggests EGR valve clogging is common in stop-start urban driving. Using low-quality fuel or skipping filter changes makes preventative maintenance critical.
Analysis derived from Renault technical bulletins (2005-2010) and UK DVSA failure statistics (2012-2022). 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 702 can be reliable with meticulous maintenance, particularly regarding the fuel system. Its main weakness is the high-pressure pump, which fails if fuel filters are neglected. With strict adherence to service schedules and use of quality fuel and oil, these engines can exceed 250,000 km. The timing chain is generally robust.
The most frequent issues are high-pressure fuel pump failure, EGR valve/carbon buildup, turbo actuator faults, and leaking injector seals. These are well-documented in Renault service bulletins. Neglecting the 20,000 km fuel filter change is the primary cause of pump failure.
The G9T 702 2.2 dCi engine was used in the Renault Laguna III (2007-2010) and Espace IV (2006-2010), specifically in the 150 PS and 173 PS variants. It was not used in the Mégane or Scénic platforms, which used smaller F9Q engines, or in pre-2005 models which used the G8T engine.
Yes, the G9T 702 responds well to ECU remapping. Stage 1 tunes can safely increase power to 190-200 PS and torque to 400 Nm, as the internals are strong. Supporting modifications like a larger intercooler are recommended for higher stages. Always ensure the fuel system is in perfect condition before tuning.
Good for its performance. A Laguna III 2.2 dCi 150 typically achieves 7.2 L/100km (city) and 5.2 L/100km (highway), or around 44 mpg UK combined. The more powerful 173 PS version is slightly thirstier but still returns 40-42 mpg UK on a mixed cycle with careful driving.
Yes. The G9T 702 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 specifies a 5W-40 synthetic oil meeting RN0710 standards. Using the correct specification is vital for protecting the turbocharger, high-pressure fuel pump, and preventing sludge. Change intervals should not exceed 20,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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