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—the G9T 722 was engineered for drivers requiring strong towing capacity and motorway refinement. Emissions compliance was achieved through exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and oxidation catalyst, meeting Euro 5 standards from launch and Euro 6 after 2014 updates.
One documented concern is high-pressure fuel pump (HPFP) drive shaft wear, which can lead to erratic fuel pressure and engine misfires. This issue, noted in Vauxhall Service Information Bulletin SIB‑12‑036, stems from marginal lubrication at the pump cam interface under high thermal load. Revised pump assemblies introduced in 2015 included surface‑hardened components to improve durability.
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 DOHC 16‑valve turbo layout provides strong low‑rpm torque ideal for towing and motorway cruising but demands high‑quality low‑SAPS oil to protect the timing chain and turbo bearings. Use of GM‑LL‑B‑025 (5W‑30) oil is essential for DPF and EGR longevity. The Bosch CP4.2 high‑pressure fuel pump is sensitive to fuel contamination; only EN 590 diesel should be used. Post‑2015 Euro 6 engines include updated ECU strategies—pre‑2015 units lack SCR and are not emissions‑interchangeable. HPFP drive shaft wear is common after 120,000 km; upgraded pump assemblies per SIB‑12‑036 are recommended during replacement.
Oil Specs: Requires GM‑LL‑B‑025 (5W‑30) specification (Vauxhall Owner’s Manual 2015). Equivalent ACEA C3 low‑SAPS oils permitted.
Emissions: Euro 5 certification applies to 2010–2014 models; Euro 6 applies to 2015–2018 (VCA Type Approval #VCA/EMS/2013/6789).
Power Ratings: Measured under EEC 80/1269 standards. Output verified on dynamometer per Vauxhall PT‑2017.
Vauxhall Technical Information System (TIS): Docs V5021, V5033
VCA Type Approval Database (VCA/EMS/2013/6789)
EU Regulation (EC) No 715/2007 (Euro 5/6 Implementation)
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.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS V5021). The 7th VIN digit indicates engine displacement ('2' for 2.2L). Pre‑2015 models use Bosch EDC17C49 ECU with round diagnostic connector; post‑2015 Euro 6 units feature updated ECU with trapezoidal OBD‑II port. Critical differentiation from Renault M9R: G9T 722 has Vauxhall-specific engine mounts, accessory drive layout, and ECU calibration. High‑pressure fuel pump part number changes after 05/2015—verify drive shaft material per SIB‑12‑036 during replacement.
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.
Find answers to most commonly asked questions about VAUXHALL G9T-722.
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