The Vauxhall G9T 750 is a 2,298 cc, inline‑four turbo‑diesel engine produced between 2013 and 2018. It features a DOHC 16‑valve layout, common‑rail direct injection, and a single variable geometry turbocharger (VGT), delivering 100 kW (136 PS) and 320 Nm of torque. Its robust architecture provides strong low‑end pull and refined operation across urban and motorway conditions.
Fitted primarily to the Insignia B (2017–2018) and Zafira Tourer C (2013–2017), the G9T 750 was engineered for responsive performance and fuel efficiency. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), meeting Euro 6 standards from launch.
One documented concern is premature failure of the high-pressure fuel pump (HPFP) drive coupling, noted in Vauxhall Service Bulletin 04‑16‑11. This issue stems from marginal lubrication under sustained high-load conditions, particularly in vehicles used for frequent motorway cruising or towing. From mid‑2016, revised HPFP couplings and updated ECU calibration were introduced to improve durability.
All production years (2013–2018) meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/8520).
The Vauxhall G9T 750 is a 2,298 cc inline‑four turbo‑diesel engineered for mid‑size models (2013–2018). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient motorway cruising. Designed to meet Euro 6 standards, it balances performance with low emissions and fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,298 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 101.3 mm | |
| Power output | 100 kW (136 PS) | |
| Torque | 320 Nm @ 1,500–2,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | DEXOS2 (SAE 5W‑30) | |
| Dry weight | 158 kg |
The inline‑four layout offers strong low-end torque ideal for mixed driving but requires strict adherence to 15,000 km or 12‑month oil change intervals to protect the HPFP drive coupling and turbo. DEXOS2 (5W‑30) oil is critical due to its low‑SAPS formulation preserving the DPF and aftertreatment system. Use only EN 590 ultra‑low‑sulfur diesel (ULSD) with adequate lubricity; marginal fuel quality accelerates HPFP wear per Vauxhall SIB 04 16 11. Avoid extended high‑load operation without adequate warm‑up, and ensure DPF regeneration completes uninterrupted to prevent soot overload.
Oil Specs: Requires DEXOS2 (5W‑30) specification (Vauxhall SIB 04 16 11). Meets ACEA C2/C3 standards.
Emissions: Euro 6 compliance applies to all production years (2013–2018) (VCA Type Approval #VCA/EMS/8520).
Power Ratings: Measured under UN ECE R85 standards. Output consistent across all applications (Vauxhall TIS Doc. V55012).
Vauxhall Technical Information System (TIS): Docs V54321, V54360, SIB 04 16 11
VCA Type Approval Database (VCA/EMS/8520)
UN Regulation No. 85 (Engine Power Measurement)
The Vauxhall G9T 750 was used across Vauxhall's D‑segment platforms with transverse mounting and sourced from Renault under the GM–Renault supply agreement. This engine received platform-specific adaptations—revised engine mounts in the Insignia B and modified exhaust routing in the Zafira Tourer C—and from 2016 adopted updated HPFP couplings per service bulletin, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Vauxhall TIS V54350). The 7th VIN digit indicates engine family ('G' for G9T series). All G9T 750 units use black valve covers and a Garrett VGT turbo with integrated actuator. Critical differentiation from petrol A20NHT: diesel units feature a DPF housing and high-pressure fuel rail with Bosch CP4.2 pump. Service parts for HPFP require production date verification—units before 06/2016 use part #13382145; later units use revised #13382146 (Vauxhall SIB 04 16 11).
The G9T 750's primary reliability risk is high-pressure fuel pump (HPFP) drive coupling failure, with elevated incidence in high-mileage or motorway-heavy vehicles. Vauxhall internal field data from 2017 indicated a measurable uptick in HPFP replacements before 120,000 km in fleet or long-distance applications, while UK DVSA MOT records show low DPF-related failures due to robust regeneration logic. Extended high-load operation without proper warm-up increases coupling stress, making oil quality and driving pattern critical.
Analysis derived from Vauxhall technical bulletins (2013–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL G9T-750.
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