The Vauxhall B12XHT (also known as PSA EB2DTS) is a 1,199 cc, inline‑three turbo‑charged diesel engine produced between 2018 and 2023. It features a DOHC 12‑valve layout with high-pressure common‑rail direct injection and a fixed‑geometry turbocharger. In standard form it delivered 70 kW (95 PS) and 230 Nm of torque, optimized for urban efficiency and compact vehicle packaging.
Fitted primarily to the Crossland X and Grandland X, the B12XHT was engineered for compliance with Euro 6d emissions standards. This was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and a selective catalytic reduction (SCR) system using AdBlue®.
One documented concern is premature failure of the high-pressure fuel pump (HPFP) drive lobe on the camshaft, which can cause hard starting or rail pressure faults. This issue, referenced in Vauxhall Service Bulletin TIS 19‑063, is linked to marginal lubrication under frequent short-trip driving or use of non‑Dexos2‑approved lubricants. Later production units incorporated surface-hardened cam lobes to improve durability.
Production years 2018–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9876).
The Vauxhall B12XHT (EB2DTS) is a 1,199 cc inline‑three turbo‑diesel engineered for subcompact and compact SUVs (2018–2023). It combines Bosch common‑rail injection with a fixed-geometry turbocharger to deliver responsive low‑rpm torque in a compact footprint. Designed to meet Euro 6d emissions standards, it integrates AdBlue® SCR technology alongside EGR and DPF systems for regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,199 cc | |
| Fuel type | Diesel (EN 590) | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 75.0 mm × 90.5 mm | |
| Power output | 70 kW (95 PS) @ 3,750 rpm | |
| Torque | 230 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (BorgWarner KP39) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | GM Dexos2 (SAE 5W‑30) | |
| Dry weight | 112 kg |
The compact three-cylinder layout and SCR/AdBlue system provide urban-friendly torque and emissions compliance but require strict adherence to 15,000 km oil change intervals using GM Dexos2 (5W‑30) to prevent HPFP cam lobe wear. Ultra-low-sulfur diesel (EN 590) is essential to avoid high-pressure pump seizure. Frequent short trips may lead to AdBlue crystallization or incomplete DPF regeneration. Vauxhall SIB 19‑063 recommends camshaft inspection if hard-start symptoms occur before 100,000 km, especially in vehicles with non‑compliant oil history.
Oil Specs: Requires GM Dexos2 (5W‑30) specification (Vauxhall SIB 19‑063). Not interchangeable with older GM-LL-A-025.
Emissions: Euro 6d certification applies to all 2018–2023 B12XHT models (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under SAE J1349 standards. Peak output assumes EN 590 diesel quality (Vauxhall TIS Doc. B12‑4501).
Vauxhall Technical Information System (TIS): Docs B12‑4410, B12‑4430, SIB 19‑063
VCA Type Approval Database (VCA/EMS/9876)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall B12XHT (EB2DTS) was used across Vauxhall's Crossland X and Grandland X platforms with transverse mounting and developed jointly with PSA Group. This engine received platform-specific adaptations—revised AdBlue tank routing in the Grandland and modified engine mounts in the Crossland—and from 2021 the facelifted Grandland models adopted updated ECU calibrations, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Vauxhall TIS B12‑4415). The 7th VIN digit indicates engine family ('2' for B12 series). All B12XHT units feature a black plastic cam cover with “1.2 Diesel” badge and an AdBlue dosing unit mounted near the exhaust manifold. Critical differentiation from petrol EB2 variants: B12XHT uses Bosch EDC17C74 ECU with AdBlue/SCR; petrol EB2 engines use MED17.5. ECU and injector part numbers must match application—interchange between diesel and petrol is not supported (Vauxhall SIB 18‑055).
The B12XHT's primary reliability risk is high-pressure fuel pump (HPFP) drive lobe wear on the camshaft, with elevated incidence in vehicles used for frequent short trips or with non‑Dexos2 oil. Vauxhall internal data from 2021 indicated a measurable uptick in HPFP-related warranty claims before 100,000 km, while UK DVSA records show minimal emissions failure correlation due to robust SCR monitoring. Oil quality and driving pattern make camshaft longevity critical.
Analysis derived from Vauxhall technical bulletins (2018–2022) and UK DVSA failure statistics (2019–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL B-12-DHT.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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