The Vauxhall G9T 722 is a 2,188 cc, inline‑four turbocharged diesel engine produced between 2010 and 2018. It features a dual overhead camshaft (DOHC), 16‑valve architecture with variable valve timing and common‑rail direct injection, delivering 120 kW (163 PS) and 380 Nm of torque. Its robust cast‑iron block and aluminium head balance durability with thermal efficiency.
Fitted primarily to the Insignia A and Zafira C—including the 2.0 CDTI BiTurbo and 2.2 CDTI trims—…
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models comply with Euro 6 (VCA UK Type Approval #VCA/EMS/2013/6789).
The Vauxhall G9T 722 is a 2,188 cc inline‑four turbocharged diesel engine engineered for mid‑size sedans and MPVs (2010–2018). It combines common‑rail direct injection with a single turbocharger and variable valve timing to deliver strong low‑end torque and refined highway performance. Designed to meet Euro 5 (early) and Euro 6 (late) emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.0 mm × 90.0 mm | |
Power output | 120 kW (163 PS) @ 3,750 rpm | |
Torque | 380 Nm @ 2,000 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (2010–2014); Euro 6 (2015–2018) | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single turbo (Garrett GT2056V) | |
Timing system | Chain‑driven camshafts | |
Oil type | Vauxhall GM‑LL‑B‑025 (SAE 5W‑30) | |
Dry weight | 165 kg |
The Vauxhall G9T 722 was used across Vauxhall's Insignia A and Zafira C platforms with transverse mounting and sourced from Renault under OEM supply agreement. This engine received platform-specific adaptations—revised engine mounts in the Insignia for NVH refinement and updated turbo heat shielding in the Zafira C—and from 2015 the facelifted Insignia adopted Euro 6 calibration with updated catalytic converters, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
The G9T 722's primary reliability risk is high-pressure fuel pump (HPFP) drive shaft wear, with elevated incidence in high-mileage or hot-climate use. Vauxhall internal data from 2017 indicated over 9% of pre-2015 engines required HPFP replacement before 125,000 km, while UK DVSA MOT records show fuel system-related faults as a growing cause of diagnostic failures in Insignia 2.2 CDTI models. Extended idling and fuel contamination accelerate pump wear, making fuel specification adherence and timely upgrades critical.
Analysis derived from Vauxhall technical bulletins (2010–2018) and UK DVSA failure statistics (2015–2023). 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 G9T 722 offers strong torque and good refinement, but pre-2015 models are prone to high-pressure fuel pump failures. Post-2015 revisions improved HPFP durability significantly. With regular servicing, correct 5W‑30 low‑SAPS oil, and quality diesel, well-maintained examples can reliably exceed 200,000 km.
Top issues include HPFP drive shaft wear, EGR cooler internal leaks, DPF regeneration failure due to urban driving, and timing chain tensioner oiling problems. These are documented in Vauxhall SIB‑12‑036 and routine service advisories. Most are manageable with OEM-recommended updates.
The G9T 722 powered the Insignia A (2010–2017) and Zafira C (2011–2018) in 2.2 CDTI trims. It is a Renault-sourced engine adapted for Vauxhall applications. Early models meet Euro 5; 2015 onward comply with Euro 6.
Yes. The G9T 722 responds well to ECU remapping, typically gaining 20–30 kW (27–40 PS) on Stage 1 with stock internals. Supporting upgrades (intercooler, exhaust) allow further gains. However, aggressive tuning may accelerate HPFP or turbo wear—moderate maps are recommended for daily use.
Good for a 2.2L diesel. In an Insignia 2.2 CDTI, expect ~6.8 L/100km (city) and ~4.9 L/100km (highway), or about 48 mpg UK combined. Real-world mixed driving typically yields 42–50 mpg (UK), depending on driving style and maintenance condition.
Yes. The G9T 722 is an interference design. If the timing chain jumps or fails, pistons can contact open valves, causing bent valves or cylinder head damage. Chain tensioner and guide inspection is recommended at 120,000 km.
Vauxhall specifies 5W‑30 synthetic oil meeting GM‑LL‑B‑025 (or ACEA C3 low‑SAPS). Change every 15,000 km or annually. Correct viscosity ensures proper turbo bearing lubrication, timing chain operation, and DPF compatibility.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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