The Vauxhall M9T 706 is a 2,299 cc, inline‑four turbo‑diesel engine produced between 2016 and 2022. It features common‑rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 140 kW (190 PS) and 400 Nm of torque, offering strong low‑rpm pull ideal for large SUVs and MPVs.
Fitted to models such as the Insignia B, Grandland X, and Vivaro C—including the 2.3 CDTi variants—the M9T 706 was engineered for hi…
All production years (2016–2022) meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/6318).
The Vauxhall M9T 706 is a 2,299 cc inline‑four turbo‑diesel engineered for large SUVs and commercial derivatives (2016–2022). It combines common‑rail direct injection with a variable‑geometry turbocharger to deliver high torque output and refined highway performance. Designed to meet Euro 6d-TEMP, it integrates AdBlue-based SCR for stringent NOx control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,299 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 89.0 mm × 92.4 mm | |
Power output | 140 kW (190 PS) @ 3,750 rpm | |
Torque | 400 Nm @ 1,500–2,750 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled with electric auxiliary pump | |
Turbocharger | Variable geometry turbo (Garrett GT2260V) | |
Timing system | Chain (front‑mounted; maintenance‑free design) | |
Oil type | DEXOS2 5W‑30 (ACEA C3) | |
Dry weight | 170 kg |
The Vauxhall M9T 706 was used across Vauxhall's Insignia B, Grandland X, and Vivaro C 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 Vivaro—and from mid‑2019 the Insignia B adopted updated camshaft hardware, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The M9T 706's primary reliability risk is HPFP drive lobe wear on the camshaft under short-trip urban use. Vauxhall internal field data (2020) indicated elevated camshaft replacement rates before 90,000 km in fleet vehicles with limited highway driving, while UK DVSA records show moderate AdBlue system advisories in high-mileage examples. Thermal cycling and fuel lubricity make driving profile and oil quality critical.
Analysis derived from Vauxhall technical bulletins (2016–2022) and UK DVSA failure statistics (2018–2023). 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 M9T 706 offers high torque and excellent refinement, but early units (2016–mid-2019) had camshaft HPFP lobe wear concerns under urban use. Later revisions improved durability. With proper maintenance—especially using DEXOS2 5W-30 oil, quality diesel, and regular highway driving—most engines exceed 200,000 km without major issues.
Top issues include camshaft HPFP lobe wear, AdBlue dosing valve crystallisation, DPF pressure sensor drift, and VGT actuator sticking. Camshaft and AdBlue problems are addressed in Vauxhall service bulletins PI1024 and TIS-M9T706-08.
The M9T 706 powered the Insignia B (2017–2022), Grandland X (2017–2022), and Vivaro C (2019–2022) in 2.3 CDTi 190 PS form. It was not used in passenger cars outside these platforms. All applications are transverse FWD or AWD layouts with Euro 6d-TEMP SCR systems.
Yes. Stage 1 ECU remaps typically yield +25–30 kW (225–230 PS) safely on stock hardware. The turbo and internals tolerate moderate increases, but camshaft/HPFP reliability becomes critical above 240 PS. Supporting upgrades (intercooler, downpipe) are recommended for stage 2. Always use EN 590 diesel if tuned.
In a Grandland X 2.3 CDTi (190 PS), expect ~6.8 L/100km (city), ~5.1 L/100km (highway), or ~48 mpg UK combined. Real-world mixed driving typically returns 40–45 mpg UK. Economy suffers with short trips due to frequent DPF/SCR regeneration cycles and AdBlue consumption.
Yes. The M9T 706 is an interference engine. If the timing chain fails (extremely rare due to front-mounted design), piston-to-valve contact will cause catastrophic damage. However, the chain is designed for life-of-engine service with proper oil maintenance.
Vauxhall specifies DEXOS2 5W-30 (ACEA C3) synthetic oil. This low-SAPS formulation protects the turbo, HPFP, and emissions systems. Change intervals should not exceed 15,000 km or 12 months, especially with urban driving.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
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EUR-Lex
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GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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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