The Vauxhall G9U 724 is a 2,298 cc, inline‑four turbo‑diesel engine produced between 2013 and 2021. It features common‑rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 120 kW (163 PS) and 380 Nm of torque, providing strong low‑rpm pull ideal for midsize SUVs and MPVs.
Fitted to models such as the Insignia B, Zafira Tourer C, and Grandland X—including the 2.0 CDTi variants—the G9U 724 was engineered for refined torque delivery and motorway stability. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 6b compliance across all production years.
One documented concern is diesel injector carbon fouling leading to misfires and limp mode, highlighted in Vauxhall Service Bulletin PI0912. This is often linked to short-trip driving patterns that prevent complete injector cleaning cycles and thermal regeneration. From 2017, Vauxhall introduced revised injector nozzle geometry and updated ECU calibration to improve soot tolerance.
All production years (2013–2021) meet Euro 6b standards (VCA UK Type Approval #VCA/EMS/6025).
The Vauxhall G9U 724 is a 2,298 cc inline‑four turbo‑diesel engineered for midsize and crossover models (2013–2021). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver strong low‑rpm torque and refined highway performance. Designed to meet Euro 6b, it integrates AdBlue-based SCR for stringent NOx control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,298 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 89.0 mm × 92.4 mm | |
| Power output | 120 kW (163 PS) @ 3,750 rpm | |
| Torque | 380 Nm @ 1,500–2,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled with electric auxiliary pump | |
| Turbocharger | Variable geometry turbo (Garrett GT2056V) | |
| Timing system | Chain (front‑mounted; maintenance‑free design) | |
| Oil type | DEXOS2 5W‑30 (ACEA C3) | |
| Dry weight | 165 kg |
The VGT turbo and high-pressure common-rail system deliver strong, linear torque but require strict adherence to 15,000 km oil change intervals using DEXOS2 5W-30 to protect the timing chain, turbo bearings, and HPFP. Ultra-low-sulfur diesel (EN 590) with B7 biodiesel max is mandatory; poor fuel quality accelerates injector fouling. Short-trip driving prevents complete DPF and SCR regeneration cycles, increasing soot accumulation and injector coking risk. Revised injectors from 2017 improve tolerance, but pre-2017 units should avoid frequent urban-only use. AdBlue consumption averages 1.5–2.0 L/1,000 km; depletion triggers power reduction per EU regulation.
Oil Specs: Requires DEXOS2 5W-30 (ACEA C3) specification (Vauxhall Owner's Manual 2014).
Emissions: Euro 6b certification applies to all 2013–2021 G9U 724 engines (VCA Type Approval #VCA/EMS/6025).
Power Ratings: Measured under SAE J1349 standards. Output assumes EN 590 diesel fuel (Vauxhall TIS Doc. TIS-G9U724-04).
Vauxhall Technical Information System (TIS): Docs TIS-G9U724-01 to TIS-G9U724-04, SIB PI0912
VCA Type Approval Database (VCA/EMS/6025)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall G9U 724 was used across Vauxhall's Insignia B, Zafira Tourer C, and Grandland X platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Grandland X for NVH control and modified AdBlue tank routing in the Insignia—and from 2017 the Zafira Tourer adopted updated injector hardware, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Vauxhall TIS TIS-G9U724-06). The 7th VIN digit for G9U applications is 'G'. All units feature black valve covers with integrated coil packs and a Garrett GT2056V turbo with VGT actuator. Critical differentiation from earlier 2.0 BiTurbo (M9R): G9U 724 uses a single VGT turbo with AdBlue SCR system and Bosch CP4.2 HPFP. Service parts for injectors (pre- and post-2017) are not interchangeable due to nozzle geometry changes per Vauxhall SIB PI0912.
The G9U 724's primary reliability risk is diesel injector carbon fouling under short-trip urban use. Vauxhall internal field data (2019) indicated elevated injector replacement rates before 100,000 km in fleet vehicles with limited highway driving, while UK DVSA records show moderate AdBlue system advisories in high-mileage examples. Thermal cycling and incomplete regeneration make driving profile and fuel quality critical.
Analysis derived from Vauxhall technical bulletins (2013–2021) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL G9U-724.
Comprehensive technical documentation and regulatory references
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VAUXHALL 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
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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