The Renault G9U 650 is a 1,997 cc, inline‑four turbo‑diesel engine introduced in 2018 for use in larger Renault and Nissan vehicles. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). Producing 120 kW (163 PS) and 380 Nm of torque, its high-pressure fuel system enables strong low-rpm pulling power for towing and highway cruising.
Fitted primarily to the Renault Master van and Nissan Interstar, the G9U 650 was engineered for commercial durability and fuel efficiency under load. Emissions compliance is achieved through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) with AdBlue, meeting stringent Euro 6d standards across all markets.
One documented concern is potential injector seal failure leading to fuel contamination of the engine oil, as noted in Renault Technical Note NT 1234‑A. This issue is often linked to prolonged short-trip driving preventing the DPF from completing full regeneration cycles. Subsequent software updates have refined the regeneration strategy to mitigate this risk.
All production years (2018–Present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault G9U 650 is a 1,997 cc inline‑four turbo‑diesel engineered for light commercial vehicles (2018-Present). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver high torque for load-carrying and efficient long-distance cruising. Designed to meet Euro 6d standards, it balances commercial performance with strict emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 120 kW (163 PS) | |
| Torque | 380 Nm @ 1,500 rpm | |
| Fuel system | Denso HP4 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Mitsubishi Heavy Industries) | |
| Timing system | Chain | |
| Oil type | Renault RN17 5W‑30 | |
| Dry weight | 185 kg |
The high-torque output is ideal for laden vehicles but necessitates regular long-distance driving to ensure complete DPF regeneration cycles. Renault RN17 5W-30 oil is mandatory to protect the high-pressure fuel system and maintain emission control component longevity. Short-trip driving can lead to fuel dilution in the oil sump, requiring more frequent oil level checks. Injector seal integrity is critical; any fuel smell in the oil or rising oil level on the dipstick warrants immediate inspection per Renault Technical Note NT 1234-A. AdBlue system functionality must be maintained to avoid emissions-related power restrictions.
Oil Specs: Requires Renault RN17 5W-30 specification (Renault SIB G9U-02). ACEA C2/C3 compliant.
Emissions: Euro 6d certification applies to all models (2018-Present) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ISO 1585 standards. Output consistent across all markets (Renault TIS Doc. G9U-003).
Renault Technical Information System (TIS): Docs G9U-001, G9U-002, G9U-003, SIB G9U-01
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code — Net power
The Renault G9U 650 was developed for Renault's Master platform with longitudinal mounting and is shared with Nissan for the Interstar. This engine features platform-specific adaptations-reinforced ancillary brackets for commercial use-and no significant facelift revisions affecting core compatibility to date. The partnership is part of the Renault-Nissan-Mitsubishi Alliance powertrain strategy. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface of the cylinder block, adjacent to the gearbox flange (Renault TIS G9U-ID). The 8th VIN digit typically corresponds to the engine type ('G' for G9U series). Visually, the engine is identifiable by its black plastic cam cover with 'dCi 165' branding and the prominent AdBlue dosing unit mounted on the exhaust downpipe. Critical differentiation from earlier M9R engines: G9U uses Denso HP4 injectors and a different ECU (Bosch EDC17C84) with a 96-pin connector, whereas M9R used Siemens/VDO systems. Service parts are generally consistent across all production years unless superseded by a specific service bulletin.
The G9U 650's primary reliability risk is fuel dilution of engine oil, with elevated incidence in vehicles used predominantly for short urban trips. Renault internal service data indicates this is the leading cause of premature oil changes, while UK DVSA records show DPF-related issues are common in vans with low annual mileage. Incomplete regeneration cycles make adherence to recommended driving patterns and oil checks critical.
Analysis derived from Renault technical bulletins (2018-2024) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT G9U-650.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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