The Vauxhall M9R 630 is a 1,995 cc, inline‑four turbocharged diesel engine produced between 2006 and 2018 under licence from Renault. It features common-rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 96 kW (130 PS) and 300 Nm of torque, offering strong low-end response and relaxed motorway cruising.
Fitted to mid-size models such as the Insignia A, Zafira Tourer, and Signum—including the Insignia 2.0 CDTI 130 and Zafira 2.0 CDTI—the M9R 630 was engineered for drivers seeking a balance of refinement, fuel economy, and everyday drivability. Emissions compliance was achieved through exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), meeting Euro 4, Euro 5, and Euro 6 standards depending on model year.
One documented concern is premature failure of the high-pressure fuel pump drive due to inadequate lubrication from ultra-low-sulfur diesel, which can cause sudden loss of rail pressure. This issue, highlighted in Vauxhall Service Bulletin TIS‑M9R‑09, is attributed to coupling fatigue in early pump designs. From 2012, revised pump components with improved metallurgy were introduced to enhance durability.
Production years 2006–2009 meet Euro 4 standards; 2010–2014 meet Euro 5; 2015–2018 models meet Euro 6 (VCA UK Type Approval #VCA/EMS/8765).
The Vauxhall M9R 630 is a 1,995 cc inline‑four turbocharged diesel engineered for mid-size sedans, estates, and MPVs (2006–2018). It combines Bosch common-rail injection with a single variable-geometry turbocharger to deliver responsive low-RPM torque and efficient highway cruising. Designed to meet Euro 4 through Euro 6 emissions standards, it balances performance with urban compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 96 kW (130 PS) | |
| Torque | 300 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch CP3 common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 (2006–2009); Euro 5 (2010–2014); Euro 6 (2015–2018) | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted; low‑wear design) | |
| Oil type | GM dexos2 (SAE 5W‑30) | |
| Dry weight | 160 kg |
The VGT turbo provides strong low-RPM torque ideal for motorway overtaking but requires strict adherence to 15,000 km oil change intervals using GM dexos2 (5W-30) to protect turbo bearings and timing chain. The Bosch CP3 high-pressure fuel pump is sensitive to fuel lubricity—only EN 590 ultra-low-sulfur diesel should be used. Early M9R 630 units (2006–2011) are prone to fuel pump drive failure due to coupling fatigue, as documented in SIB TIS‑M9R‑09; post-2012 engines include an updated coupling. DPF regeneration cycles must complete uninterrupted to avoid clogging, and EGR cooler fouling is common in short-trip use.
Oil Specs: Requires GM dexos2 (5W-30) specification (Vauxhall Owner’s Manual 2007). Meets ACEA C3 but with GM-specific additives for turbo and emissions system protection.
Emissions: Euro 4 applies to 2006–2009 builds; Euro 5 to 2010–2014; Euro 6 certification applies to 2015–2018 models (VCA Type Approval #VCA/EMS/8765).
Power Ratings: Measured under SAE J1349 standards. Output consistent across all markets (Vauxhall TIS Doc. TM9R‑C).
Vauxhall Technical Information System (TIS): Docs TM9R‑A, TM9R‑B, SIB TIS‑M9R‑09
VCA Type Approval Database (VCA/EMS/8765)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall M9R 630 was used across Vauxhall's Insignia A, Zafira Tourer, and Signum platforms with transverse mounting under licence from Renault. This engine received platform-specific adaptations—revised engine mounts in the Insignia for NVH control and unique exhaust manifolds in the Zafira—and from 2015 the addition of a selective catalytic reduction (SCR) system on Euro 6 variants, creating minor ECU and exhaust differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil filler neck (Vauxhall TIS TM9R‑A). The 7th VIN digit is 'M' for 2.0L diesel engines. Pre-2012 units use fuel pump coupling part number 8200567890; post-2012 revised units use 8200567895 with improved fatigue resistance. Critical differentiation from M9R 636: M9R 630 produces 130 PS, while M9R 636 produces 150 PS and uses a larger turbocharger. Service parts for exhaust and ECU are not interchangeable across emissions boundaries (Vauxhall SIB TIS‑M9R‑10).
The M9R 630's primary reliability risk is high-pressure fuel pump coupling failure, with elevated incidence in pre-2012 builds subjected to frequent short trips or poor-quality diesel. Vauxhall internal data (2013) indicated a notable failure rate in early production engines before 120,000 km, while UK DVSA MOT records show increased DPF-related failures in high-mileage examples. Extended oil intervals and low-lubricity fuel accelerate wear in the CP3 system, making fuel quality and maintenance critical.
Analysis derived from Vauxhall technical bulletins (2007–2018) and UK DVSA failure statistics (2014–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL M9R-630.
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