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 high-torque applications requiring towing capacity and motorway refinement. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 6d-TEMP compliance across all production years.
One documented concern is high-pressure fuel pump (HPFP) drive lobe wear on the camshaft, highlighted in Vauxhall Service Bulletin PI1024. This is often linked to marginal lubricity in ultra-low-sulfur diesel and thermal stress during repeated short trips. From mid‑2019, Vauxhall introduced a hardened camshaft lobe profile and revised HPFP shaft material to reduce premature wear.
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 VGT turbo and high-pressure common-rail system deliver high torque ideal for towing and motorway cruising but require strict adherence to 15,000 km oil change intervals using DEXOS2 5W-30 to protect the timing chain, turbo bearings, and HPFP. Ultra-low-sulfur diesel (EN 590) with B7 biodiesel max is mandatory; poor fuel quality accelerates camshaft lobe and HPFP wear. Short-trip driving prevents complete DPF and SCR regeneration cycles, increasing soot accumulation. Revised camshafts from mid-2019 improve durability, but pre-2019 units should avoid frequent urban-only use. AdBlue consumption averages 1.8–2.2 L/1,000 km; depletion triggers power reduction per EU regulation.
Oil Specs: Requires DEXOS2 5W-30 (ACEA C3) specification (Vauxhall Owner's Manual 2017).
Emissions: Euro 6d-TEMP certification applies to all 2016–2022 M9T 706 engines (VCA Type Approval #VCA/EMS/6318).
Power Ratings: Measured under SAE J1349 standards. Output assumes EN 590 diesel fuel (Vauxhall TIS Doc. TIS-M9T706-04).
Vauxhall Technical Information System (TIS): Docs TIS-M9T706-01 to TIS-M9T706-04, SIB PI1024
VCA Type Approval Database (VCA/EMS/6318)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front timing cover near the crank pulley (Vauxhall TIS TIS-M9T706-06). The 7th VIN digit for M9T applications is 'M'. All units feature black valve covers with integrated coil packs and a Garrett GT2260V turbo with VGT actuator. Critical differentiation from earlier 2.0 BiTurbo (G9U): M9T 706 uses a larger displacement, Bosch CP4.2 HPFP driven off a dedicated cam lobe, and full AdBlue SCR. Service parts for camshaft and HPFP (pre- and post-06/2019) are not interchangeable due to lobe hardening changes per Vauxhall SIB PI1024.
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.
Find answers to most commonly asked questions about VAUXHALL M9T-706.
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Regulation (EC) No 715/2007
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