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 engineered for drivers prioritizing fuel efficiency and low-end pulling power. Emissions compliance for Euro 6d-TEMP was achieved through a sophisticated exhaust after-treatment system combining a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection.
One documented engineering update addressed potential EGR cooler condensation issues under specific low-load, high-humidity conditions, as noted in Renault Service Bulletin RSB‑2021‑08. This was mitigated by a revised EGR cooler design and updated engine control unit (ECU) mapping to optimize exhaust gas temperatures during warm-up cycles.
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 twin-scroll VGT provides immediate torque delivery, ideal for stop-start traffic, but demands adherence to 20,000 km or 12-month service intervals to maintain DPF and SCR system health. Renault RN0720 (5W-30) oil is mandatory to protect the high-pressure fuel system and emissions components. Extended idling or frequent short trips can lead to DPF clogging; regular highway driving is recommended for passive regeneration. The EGR system requires periodic inspection for carbon buildup, especially in high-mileage vehicles. AdBlue tank refills are a routine maintenance item, with dashboard warnings indicating low levels.
Oil Specs: Requires Renault RN0720 specification (Renault SIB RSB‑2021‑08). Equivalent to ACEA C2/C3 standards.
Emissions: Euro 6d-TEMP certification applies to all 2018-2023 models (VCA Type Approval #VCA/EMS/5678). Real Driving Emissions (RDE) compliant.
Power Ratings: Measured under SAE J1349 standards. Output figures are net ratings for production vehicles (Renault Group PT‑2022).
Renault Technical Information System: Docs RTM-G9U, SIB RSB-2020-05, SIB RSB-2021-08
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the gearbox flange (Renault RTM-G9U). The 8th VIN digit typically corresponds to the engine type ('G' for this family). Visually, the engine is identifiable by its black plastic cam cover with 'dCi 130' branding and the prominent AdBlue tank filler cap located in the rear quarter panel or under the bonnet. Critical differentiation from the smaller 1.5 dCi: The G9U 630 has a visibly larger turbocharger and a more complex exhaust manifold feeding into the SCR/DPF system.
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.
Find answers to most commonly asked questions about RENAULT G9U-630.
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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