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 150 and 2.2 dCi 173, the G9T 702 was engineered for a blend of performance and refinement in mid-size applications. Emissions compliance for most units was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 4 standards.
One documented reliability concern involves premature failure of the high-pressure fuel pump’s internal pressure regulator, which can trigger fuel pressure faults and engine stalling. This issue, referenced in Renault Technical Note LAG‑02‑06, is often linked to fuel contamination or water ingress. Later revisions incorporated minor updates to the pump's internal seals and filtration.
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 VGT turbo provides strong low-RPM torque ideal for overtaking but demands strict 20,000 km fuel filter changes to protect the high-pressure pump. Renault RN0710 (5W-40) oil is critical for turbo and injector longevity. Extended idling should be avoided to prevent EGR valve coking. The Bosch CP3 pump is sensitive to water and low-quality fuel; always use EN 590 standard diesel. The internal pressure regulator is prone to failure per Renault Note LAG-02-06; pre-emptive replacement is advised on high-mileage engines. EGR/DPF systems require periodic cleaning to maintain emissions compliance.
Oil Specs: Requires Renault RN0710 specification (Renault Technical Note LAG-02-06). Equivalent to ACEA B4.
Emissions: Euro 4 certification applies to all 2005-2010 G9T 702 models (VCA Type Approval #VCA/EMS/5683).
Power Ratings: Measured under SAE J1349 standards. 127 kW output requires EN 590 fuel quality (Renault Group PT-2008).
Renault Technical Information System: Docs LAG-02-06, Service Manual 2.2 dCi
VCA Type Approval Database (VCA/EMS/5683)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on a flat pad on the front of the cylinder block, below the exhaust manifold (Renault Service Manual 2.2 dCi). The 8th VIN digit typically indicates engine power output ('H' for 150 PS, 'J' for 173 PS). All G9T 702 engines feature a black plastic cam cover with 'dCi' branding. Critical differentiation from the earlier G8T: The 702 uses a Bosch CP3 common-rail system and a VGT turbo, while the G8T used a VP44 rotary pump and fixed-geometry turbo. Fuel pumps and turbochargers are specific to the G9T 702 variant and not interchangeable with G8T codes.
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.
Find answers to most commonly asked questions about RENAULT G9T-702.
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Regulation (EC) No 715/2007
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