The Renault G9U 750 is a 1,749 cc, inline‑four turbo‑diesel engine introduced in 2018. It features a high-pressure common-rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). This engine produces 120 kW (163 PS) and 380 Nm of torque, designed to offer a blend of performance and efficiency for Renault's larger vehicles.
Fitted primarily to the Koleos SUV and Talisman sedan, the G9U 750 was engineered for refined, effortless cruising and strong towing capability. Emissions compliance is achieved through a sophisticated exhaust after-treatment system including a diesel particulate filter (DPF) and selective catalytic reduction (SCR), meeting stringent Euro 6d-TEMP and Euro 6d standards.
One documented area for attention is the high-pressure fuel pump, with some early units experiencing premature wear. This was addressed in service campaigns referencing Renault Technical Note 7711A. The issue is often linked to fuel quality and contamination, leading to pump failure and subsequent engine management faults.
Production years 2018–Present meet Euro 6d-TEMP and Euro 6d standards depending on model year and specific market homologation (VCA UK Type Approval #VCA/EMS/5678).
The Renault G9U 750 is a 1,749 cc inline‑four turbo‑diesel engineered for mid‑size and large vehicles (2018-Present). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong, linear torque and refined performance. Designed to meet Euro 6d standards, it balances power with low emissions and fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,749 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 80.0 mm × 87.0 mm | |
| Power output | 120 kW (163 PS) | |
| Torque | 380 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d-TEMP / Euro 6d | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN17 5W‑30 | |
| Dry weight | 165 kg |
The G9U 750 provides strong, accessible torque ideal for highway driving and towing but demands strict adherence to 20,000 km or 12-month oil change intervals using Renault RN17 specification oil to protect the turbo and fuel system. Ultra-low-sulfur diesel (ULSD) meeting EN 590 standards is mandatory to prevent damage to the high-pressure CP4.2 fuel pump and DPF/SCR systems. Post-2020 models feature updated pump internals; owners of early 2018-2019 vehicles should ensure service campaign 7711A has been performed if not already addressed. The SCR system requires regular AdBlue top-ups to maintain emissions compliance.
Oil Specs: Requires Renault RN17 5W-30 specification (Renault Owner's Manual). Compatible with ACEA C2/C3 standards.
Emissions: Euro 6d-TEMP certification applies to 2018-2019 models; Euro 6d certification for 2020+ models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard calibration (Renault TIS Doc. G9U-003).
Renault Technical Information System (TIS): Docs G9U-001, G9U-002, G9U-003
VCA Type Approval Database (VCA/EMS/5678)
Renault Service Information Bulletin (SIB) 7711A
The Renault G9U 750 was used across Renault's CMF-CD platform with transverse mounting. This engine received platform-specific adaptations-optimized cooling for the Koleos and revised engine mounts for the Talisman-with no major facelift revisions affecting core compatibility to date. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a plate riveted to the cylinder head, near the front of the engine (Renault TIS G9U-005). The 8th VIN digit typically corresponds to the engine code 'G'. Visually, the engine is identifiable by its black plastic cam cover with "dCi 160" or "Blue dCi 160" branding and the presence of an AdBlue tank filler cap near the diesel filler. Critical differentiation from the older R9M engine: G9U 750 has a Honeywell VGT turbo and a CP4.2 high-pressure fuel pump, whereas R9M uses a Garrett turbo and CP4.1 pump. Service parts, particularly for the fuel system, are not interchangeable.
The G9U 750's primary reliability concern is potential failure of the high-pressure fuel pump, with elevated incidence in vehicles using poor-quality fuel. Renault Technical Note 7711A documents this issue for early production units, while owner reports frequently cite DPF regeneration problems linked to predominantly short-trip driving. Adhering to fuel quality standards and driving patterns that allow for complete DPF cycles is critical for long-term reliability.
Analysis derived from Renault technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT G9U-750.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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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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