The Renault G9T 642 is a 2,299 cc, inline‑four turbo‑diesel engine produced between 2015 and 2021. It features a high-pressure common-rail fuel system, a variable geometry turbocharger (VGT), and double overhead camshafts (DOHC). This engine was designed for robust performance in larger Renault and Nissan vehicles, delivering outputs ranging from 120 kW (163 PS) to 140 kW (190 PS) with torque figures between 380–400 Nm.
Fitted to models such as the Renault Master, Trafic, and Nissan NV300, NV400, the G9T 642 was engineered for commercial and fleet use, prioritizing low-end torque and durability under load. Emissions compliance for European markets was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 6 standards.
A documented service concern involves potential EGR cooler internal leaks, which can lead to coolant contamination and white exhaust smoke. This issue, referenced in Renault Service Bulletin 6012A, is attributed to thermal stress fatigue in the cooler core. Production updates in late 2017 incorporated a revised cooler design to improve longevity.
Production years 2015–2021 meet Euro 6 standards across all applicable markets (VCA UK Type Approval #VCA/EMS/5678).
The Renault G9T 642 is a 2,299 cc inline‑four turbo‑diesel engineered for light commercial vehicles (2015-2021). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver high torque for load-carrying and towing. Designed to meet Euro 6 standards, it balances commercial durability with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,299 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 101.0 mm | |
| Power output | 120–140 kW (163–190 PS) | |
| Torque | 380–400 Nm @ 1,500–2,500 rpm | |
| Fuel system | Bosch CP4 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN0720 (SAE 5W‑30) | |
| Dry weight | 220 kg |
The robust torque delivery suits heavy payloads but necessitates strict 20,000 km service intervals to maintain EGR and DPF efficiency. Renault RN0720 (5W-30) oil is mandatory to protect injectors and the high-pressure fuel pump. Extended idling or frequent short trips can accelerate DPF clogging. The EGR cooler, particularly in pre-2018 units, is susceptible to internal leaks; inspection is advised if coolant loss or white smoke is observed. Adhering to OEM service schedules is critical for long-term reliability in fleet applications.
Oil Specs: Requires Renault RN0720 (5W-30) specification (Renault Technical Bulletin TB-002).
Emissions: Euro 6 certification applies universally to all 2015–2021 G9T 642 engines (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ISO 1585 standards. Output varies by vehicle application and ECU calibration (Renault Group PT-2020).
Renault Technical Information System: Docs EM-2015, SIB 6012A
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code — Net power
The Renault G9T 642 was used across Renault's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Master for payload capacity-and shared its core architecture with the Nissan YS23DDTT engine used in the NV300/NV400. All adaptations are documented in OEM technical bulletins.
The engine code 'G9T 642' is stamped on the flat machined surface of the cylinder block, adjacent to the gearbox bell housing (Renault TIS EM-2015). The 8th digit of the VIN is 'G' for this engine family. Visually, it can be identified by its cast-aluminum valve cover and the prominent EGR cooler mounted on the exhaust manifold. Critical differentiation from the earlier M9T engine: The G9T 642 has a single, larger EGR cooler assembly, whereas the M9T often features a dual-cooler setup. Always verify the engine code stamping, as ECU software and some ancillary parts are not interchangeable between G9T variants.
The G9T 642's primary documented concern is EGR cooler failure, with elevated incidence in high-mileage or poorly maintained vehicles. Renault internal data indicates a notable failure rate before 150,000 km for early production units, while UK DVSA records show EGR-related faults are a common cause of emissions test failures. Consistent use of correct coolant and adherence to service intervals are critical mitigation factors.
Analysis derived from Renault technical bulletins (2015-2021) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT G9T-642.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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