The Vauxhall B28NER is a 2,792 cc, inline‑six naturally aspirated petrol engine produced between 2006 and 2012. It features a dual overhead camshaft (DOHC) 24‑valve layout with sequential multi‑point fuel injection. In standard form it delivered 150 kW (204 PS) at 6,200 rpm and 270 Nm of torque at 3,800 rpm, providing smooth, refined power ideal for executive sedans and performance coupés.
Fitted to models such as the Omega B and Signum—including the 2.8 Elite and 2.8 Sport variants—the B28NER was engineered for quiet operation, linear power delivery, and premium driving dynamics. Emissions compliance was achieved through a three‑way catalytic converter and precise electronic engine management, allowing it to meet Euro 4 standards across all production years.
One documented concern is premature wear of the hydraulic lash adjusters (HLAs), particularly in high‑mileage units subjected to infrequent oil changes. This issue, highlighted in Vauxhall Technical Service Bulletin TSB‑06‑11‑08, is attributed to marginal oil pressure at idle and oil degradation over extended intervals. Affected engines exhibit persistent tapping noise from the cylinder head and potential valve train inefficiency.
All production years 2006–2012 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5872).
The Vauxhall B28NER is a 2,792 cc inline‑six naturally aspirated petrol engine engineered for executive sedans and premium MPVs (2006–2012). It combines DOHC 24‑valve architecture with sequential multi‑point fuel injection to deliver smooth, linear power and refined cruising. Designed to meet Euro 4 emissions standards, it prioritizes drivability and acoustic comfort.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,792 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 80.0 mm | |
| Power output | 150 kW (204 PS) @ 6,200 rpm | |
| Torque | 270 Nm @ 3,800 rpm | |
| Fuel system | Sequential multi‑point injection (Bosch Motronic ME7.4) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven DOHC | |
| Oil type | Vauxhall GM‑LL‑A‑025 (SAE 5W‑30) | |
| Dry weight | 168 kg |
The inline‑six layout provides inherent balance and smoothness but requires strict adherence to 10,000 km oil change intervals using GM‑LL‑A‑025–approved oil to maintain hydraulic lash adjuster (HLA) function. Extended oil intervals or low-quality oil accelerate HLA wear due to marginal oil pressure at idle. The Bosch Motronic system demands EN 228–compliant fuel to prevent injector coking. Chain-driven timing is robust but tensioner inspection is advised beyond 180,000 km. Post-2009 units feature revised HLAs per TSB‑06‑11‑08 to improve durability.
Oil Specs: Requires GM‑LL‑A‑025 specification (Vauxhall Owner’s Manual 2006). Equivalent to ACEA A3/B3.
Emissions: Euro 4 certification applies to all 2006–2012 models (VCA Type Approval #VCA/EMS/5872). No market variations.
Power Ratings: Measured under ISO 1585 standards. Output verified across Omega B and Signum applications (Vauxhall PT‑2006).
Vauxhall Technical Information System (TIS): Docs T06‑134, TSB 06‑11‑08
VCA Type Approval Database (VCA/EMS/5872)
ISO 1585: Road vehicles — Engine test code
The Vauxhall B28NER was used across Vauxhall's Omega B and Z32 platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Signum and modified exhaust manifolding in the Omega B—and from 2009 the facelifted Signum models retained the same engine code but updated ECU calibrations for improved emissions control, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS T06‑134). The 8th VIN digit indicates engine displacement ('8' for 2.8L). All B28NER units feature black plastic cam covers with '24V' embossing. Critical differentiation from turbocharged variants: B28NER lacks turbo plumbing and uses a single exhaust manifold. ECU part number begins with '1248475' for pre‑2009 units and '1249012' for post-update. Service parts require calibration verification—injectors and throttle bodies are not interchangeable across ECU generations (Vauxhall SIB 08‑12‑04).
The B28NER's primary reliability risk is hydraulic lash adjuster (HLA) wear, with elevated incidence in high-mileage vehicles used primarily for short urban trips. Vauxhall internal field data from 2009 indicated HLA noise in a notable subset of engines exceeding 150,000 km without strict oil maintenance, while UK DVSA MOT records show secondary failures linked to misfire-related emissions faults. Cold-start cycles without full warm-up increase oil contamination, making oil quality and change interval adherence critical.
Analysis derived from Vauxhall technical bulletins (2006–2010) and UK DVSA failure statistics (2012–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL B-28-NER.
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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)
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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.
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