The Vauxhall M9R 788 is a 2,188 cc, inline‑four turbocharged diesel engine produced between 2011 and 2020. It features a DOHC 16‑valve layout, common‑rail direct injection, and a variable geometry turbocharger (VGT), delivering 120 kW (163 PS) and 380 Nm of torque. Exhaust gas recirculation (EGR) and a diesel particulate filter (DPF) enable strong low‑rpm torque for everyday drivability while meeting stringent emissions targets.
Fitted to models such as the Insignia…
Production years 2011–2014 meet Euro 5 standards; 2015–2020 models meet Euro 6b .
The Vauxhall M9R 788 is a 2,188 cc inline‑four turbocharged diesel engineered for mid‑size, MPV, and light commercial models (2011–2020). It combines common‑rail direct injection with a variable geometry turbocharger to deliver robust low‑rpm torque and efficient highway cruising. Designed to meet Euro 5 (early) and Euro 6b (later) 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 | 84.0 mm × 98.5 mm | |
Power output | 120 kW (163 PS) @ 4,000 rpm | |
Torque | 380 Nm @ 1,750–2,750 rpm | |
Fuel system | Bosch CP3.4 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 (2011–2014); Euro 6b (2015–2020) | |
Compression ratio | 15.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable geometry turbo (Garrett GT1549V) | |
Timing system | Chain (front‑mounted, maintenance‑free design) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 168 kg |
The Vauxhall M9R 788 was used across Vauxhall's Insignia A, Zafira Tourer, and Vivaro platforms with transverse mounting under licence from Renault. This engine received platform-specific adaptations—reinforced mounts in the Vivaro for commercial use and compact exhaust manifolds in the Insignia—and from 2015 the Zafira LCI adopted updated camshaft hardware and Euro 6b emissions systems, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The M9R 788 offers strong torque and good efficiency, but early models (2011–2014) had camshaft HPFP drive lobe wear concerns. Later revisions (post-2015) improved camshaft durability. With regular servicing and GM dexos2 oil, well-maintained examples can exceed 150,000 km without major issues.
The most frequent issues are camshaft HPFP drive lobe wear, DPF clogging from short trips, EGR valve carbon buildup, and oil leaks from the cam cover. These are documented in Vauxhall service bulletins, particularly SIB 12 042.
This 2.0L turbo diesel (Renault-sourced) was used in the Insignia A (2011–2017), Zafira Tourer (2011–2019), and Vivaro (2014–2020). All variants are badged '2.0 CDTI' and comply with Euro 5 (early) or Euro 6b (later) emissions standards.
Aftermarket ECU tuning is common on the M9R-788 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In an Insignia 2.0 CDTI, typical consumption is ~6.0 L/100km (city) and ~4.2 L/100km (highway), or about 55 mpg UK combined. Real-world mixed driving usually returns 50–58 mpg (UK), depending on driving style and model weight.
Yes. The M9R 788 is an interference engine. If the timing chain fails (though rare due to robust design), piston-to-valve contact can cause catastrophic damage. However, the chain is designed as maintenance-free and rarely fails if oil is changed regularly.
Vauxhall specifies GM dexos2 (SAE 5W-30) synthetic oil. Always use this exact specification to ensure camshaft and turbo longevity, and change every 15,000 km or 12 months—whichever comes first.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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