The Vauxhall M9T 672 is a 2,298 cc, inline‑four twin-turbo diesel engine produced between 2016 and 2021. It features a DOHC 16‑valve layout, common‑rail direct injection, and a sequential twin-turbo system (low-pressure and high-pressure VGTs), delivering 140 kW (190 PS) and 400 Nm of torque. Its robust architecture provides strong low-end response and sustained high-load capability ideal for larger vehicles and towing.
Fitted primarily to the Insignia B (2017–2021) and Vivaro B (2016–2021), the M9T 672 was engineered for high torque delivery and motorway stability. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), selective catalytic reduction (SCR) with AdBlue, and a diesel particulate filter (DPF), meeting Euro 6d TEMP standards from launch.
One documented concern is premature failure of the high-pressure turbocharger actuator, noted in Vauxhall Service Bulletin 09‑18‑05. This issue stems from thermal stress and electrical degradation in sustained high-load conditions, particularly in fleet or towing applications. From mid‑2019, revised actuator units with improved thermal shielding were introduced to enhance reliability.
All production years (2016–2021) meet Euro 6d TEMP or Euro 6d standards depending on registration date (VCA UK Type Approval #VCA/EMS/9120).
The Vauxhall M9T 672 is a 2,298 cc inline‑four twin-turbo diesel engineered for D‑segment and LCV platforms (2016–2021). It combines high-pressure common‑rail injection with sequential variable‑geometry turbochargers to deliver exceptional low‑rpm torque and sustained power for towing or highway cruising. Designed to meet Euro 6d TEMP (and later Euro 6d) standards, it integrates AdBlue-based SCR for NOx control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,298 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 85.0 mm × 101.3 mm | |
| Power output | 140 kW (190 PS) | |
| Torque | 400 Nm @ 1,500–2,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d TEMP / Euro 6d (by registration date) | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Sequential twin VGT (Garrett LP + BorgWarner HP) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | DEXOS2 (SAE 5W‑30) | |
| Dry weight | 172 kg |
The twin-turbo layout delivers exceptional torque for towing and motorway use but requires strict adherence to 15,000 km or 12‑month oil change intervals to protect turbo actuators and the high-pressure fuel system. DEXOS2 (5W‑30) oil is critical due to its low-SAPS formulation preserving the DPF and SCR system. Use only EN 590 ultra-low-sulfur diesel (ULSD) with adequate lubricity; marginal fuel quality accelerates HPFP and turbo wear per Vauxhall SIB 09 18 05. Extended high-load operation without adequate warm-up increases thermal stress on the high-pressure turbo actuator. AdBlue consumption must be monitored—running dry disables engine restart per EU regulation.
Oil Specs: Requires DEXOS2 (5W‑30) specification (Vauxhall SIB 09 18 05). Meets ACEA C2/C3 standards.
Emissions: Euro 6d TEMP applies to vehicles registered 2016–2019; Euro 6d applies from 2020 onward (VCA Type Approval #VCA/EMS/9120).
Power Ratings: Measured under UN ECE R85 standards. Output consistent across all applications (Vauxhall TIS Doc. V32200).
Vauxhall Technical Information System (TIS): Docs V32109, V32150, SIB 09 18 05
VCA Type Approval Database (VCA/EMS/9120)
UN Regulation No. 85 (Engine Power Measurement)
The Vauxhall M9T 672 was used across Vauxhall's D‑segment and LCV platforms with transverse mounting and sourced from Renault under the GM–Renault supply agreement. This engine received platform-specific adaptations—reinforced engine mounts in the Insignia B and modified exhaust routing in the Vivaro B—and from 2019 adopted updated turbo actuators 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 V32140). The 7th VIN digit indicates engine family ('M' for M9T series). All M9T 672 units use black valve covers and feature dual turbochargers with separate actuator arms. Critical differentiation from single-turbo M9T variants: M9T 672 has two turbos (one near exhaust manifold, one downstream) and an AdBlue tank. Service parts for HP turbo actuator require production date verification—units before 06/2019 use part #13395432; later units use revised #13395433 (Vauxhall SIB 09 18 05).
The M9T 672's primary reliability risk is high-pressure turbocharger actuator failure, with elevated incidence in fleet, towing, or motorway-heavy vehicles. Vauxhall internal field data from 2020 indicated a measurable uptick in turbo-related DTCs before 100,000 km in commercial applications, while UK DVSA MOT records show low SCR/DPF failures due to robust AdBlue dosing logic. Extended high-load operation without cooldown increases actuator thermal fatigue, making driving pattern and oil quality critical.
Analysis derived from Vauxhall technical bulletins (2016–2021) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL M9T-672.
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