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, Traf…
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 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 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G9T 642 is generally robust for commercial use, but its longevity heavily depends on maintenance. The primary concern is the EGR cooler, especially in pre-2018 models. With strict adherence to service intervals, use of correct RN0720 oil, and addressing coolant issues promptly, these engines can reliably exceed 200,000 km.
The most frequent issues are EGR cooler leaks (causing coolant loss and white smoke), DPF clogging (leading to limp mode), turbo actuator failures, and high-pressure fuel pump wear. These are well-documented in Renault and Nissan service bulletins for the Master, Trafic, NV300, and NV400.
The G9T 642 was used in the Renault Master III (Phase 2, 2015-2021) and Trafic III (2015-2021), badged as dCi 150 or dCi 170. It was also used by Nissan in the NV300 and NV400 (2015-2021) as the 2.3 dCi 150/170, sharing the same core engine architecture.
Yes, ECU remapping is common and can safely increase power by 20-30 kW and torque by 50-70 Nm. The engine's internals are strong, but supporting modifications like an upgraded intercooler are recommended. Any tuning should be performed by a specialist familiar with Renault/Nissan commercial vehicles.
Fuel economy varies significantly by vehicle, load, and driving style. In a Renault Trafic, expect 7.5-9.0 L/100km (31-38 mpg UK) combined. In a heavier Master van, figures are typically 9.0-11.0 L/100km (26-31 mpg UK). Real-world consumption is highly dependent on payload and route type.
Yes. The G9T 642 is an interference engine. If the timing chain fails or skips, the pistons will collide with the open valves, causing catastrophic internal damage. While the chain is designed to last the engine's life, any unusual noise should be investigated immediately.
Renault mandates the use of RN0720 specification oil, typically a 5W-30 synthetic. Using the correct oil is critical for protecting the high-pressure fuel pump, turbocharger, and emissions systems (DPF/EGR). Never use an oil that does not meet the RN0720 standard.
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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