The Renault G9U 630 is a 1,749 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a high — pressure common — rail fuel system, a variable geometry turbocharger (VGT), and double overhead camshafts. This engine was designed to deliver a balance of 96 kW (130 PS) and 340 Nm of torque, with its twin — scroll turbocharger enhancing throttle response for urban and highway driving.
Fitted primarily to the K9K — based Kadjar and Megane IV, the G9U 630 was e…
Production years 2018–2023 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault G9U 630 is a 1,749 cc inline‑four turbo‑diesel engineered for compact SUVs and hatchbacks (2018-2023). It combines a high-pressure common-rail system with a twin-scroll variable-geometry turbocharger to deliver strong low-end torque and responsive performance. Designed to meet Euro 6d-TEMP standards, it balances efficiency with stringent emissions control.
| 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 | 96 kW (130 PS) | |
Torque | 340 Nm @ 1,750 rpm | |
Fuel system | Denso HP3 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin-scroll VGT (Garrett) | |
Timing system | Chain-driven | |
Oil type | Renault RN0720 (SAE 5W‑30) | |
Dry weight | 148 kg |
The Renault G9U 630 was used across Renault's CMF-CD platform with transverse mounting. This engine received platform-specific adaptations-optimized engine mounts for the Kadjar SUV and revised intake manifolds for the Megane IV Sport Tourer. All adaptations are documented in OEM technical bulletins.
The G9U 630's primary reliability focus is maintaining its complex emissions system. Renault internal data indicates that adherence to service schedules is the strongest predictor of long-term reliability, while UK DVSA statistics show DPF-related issues are the most common cause of emissions test failures for this engine. Neglecting AdBlue refills or using incorrect oil can lead to expensive component failures.
Analysis derived from Renault technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2023). 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 G9U 630 is generally robust mechanically. Its long-term reliability heavily depends on strict adherence to service intervals, using the correct RN0720 oil, and maintaining the AdBlue/DPF system. Neglecting these can lead to costly emissions-related repairs.
The most frequent issues are DPF clogging from short trips, AdBlue system faults (empty tank or sensor failures), EGR valve carbon buildup, and occasional injector seal leaks. These are well-documented in Renault service bulletins.
This 1.7L dCi 130 engine was used in the Renault Kadjar (2018-2023) and the Renault Megane IV, including both the hatchback and Sport Tourer variants (2018-2023). It was not used in other Renault or Nissan models.
Yes, ECU remapping is common and can safely increase power to around 160-170 PS and torque to 380-400 Nm. However, this increases stress on the clutch, turbo, and emissions systems, potentially reducing their lifespan and voiding warranties.
Official combined figures are around 4.5-5.0 L/100km (63-56 mpg UK). Real-world consumption typically ranges from 5.5-6.5 L/100km (51-43 mpg UK) depending on driving style, vehicle model (Kadjar vs Megane), and DPF regeneration cycles.
Yes. Like virtually all modern engines, the G9U 630 is an interference design. If the timing chain fails or jumps, the pistons will collide with the valves, causing catastrophic internal engine damage. Fortunately, the chain is very durable.
Renault mandates RN0720 specification oil, typically a 5W-30 low-ash synthetic. Using the correct oil is non-negotiable to protect the DPF and SCR systems. Always check the owner's manual or oil filler cap for the exact specification.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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