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 cruis…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G9U 750 is generally robust, offering strong performance and good efficiency. Its main long-term concern is the high-pressure fuel pump, particularly in early models or with poor fuel quality. Addressing service campaign 7711A and using high-quality diesel significantly improves reliability. Regular, longer drives are also crucial for DPF health.
The most frequently documented issues are high-pressure fuel pump failures (addressed in SIB 7711A), excessive DPF regeneration needs from short trips, AdBlue system faults, and EGR valve clogging. These are well-covered in Renault's technical documentation and owner advisories.
The G9U 750 1.8L dCi 160 engine was used in the second-generation Renault Koleos SUV (from 2018) and the Renault Talisman sedan (from 2018 until its discontinuation in 2022). It was not used in any other manufacturers' vehicles.
Yes, the G9U 750 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 147-155 kW (200-210 PS) and torque to 420-450 Nm. The stock turbo and internals are generally capable of handling this. More aggressive tuning requires supporting modifications and carries increased risk.
Official combined figures are around 5.5-6.0 L/100km (51-47 mpg UK) depending on the model and trim. Real-world consumption varies greatly: expect 7.0-8.5 L/100km (40-33 mpg UK) in mixed driving, with highway figures closer to 5.0-5.5 L/100km (56-51 mpg UK). Short trips will significantly increase consumption due to DPF cycles.
Yes. Like virtually all modern engines, the G9U 750 is an interference design. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the timing chain is very durable and not a common failure point for this engine.
Renault mandates the use of RN17 specification 5W-30 synthetic oil. This low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is specifically formulated to protect the emissions systems (DPF, SCR) and provide optimal lubrication for the turbocharger and fuel pump. Using the correct oil is non-negotiable for long-term reliability.
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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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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