The Vauxhall B14NET is a 1,399 cc, inline‑four turbocharged petrol engine produced between 2015 and 2021. It features a dual overhead camshaft (DOHC) 16‑valve layout with direct fuel injection and variable valve timing, delivering 103 kW (140 PS) and 200 Nm of torque. The use of a low — inertia turbocharger and high — pressure gasoline direct injection (GDI) enables responsive performance with improved fuel efficiency compared to naturally aspirated predecessors.
Fit…
All production years (2015–2021) meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/9876).
The Vauxhall B14NET is a 1,399 cc inline‑four turbocharged petrol engine engineered for compact hatchbacks and crossovers (2015–2021). It combines gasoline direct injection with a low-inertia turbocharger to deliver responsive mid-range torque and efficient urban driving. Designed to meet Euro 6 emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,399 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.0 mm × 81.3 mm | |
Power output | 103 kW (140 PS) @ 4,900 rpm | |
Torque | 200 Nm @ 1,850–4,000 rpm | |
Fuel system | Bosch HDEV5 gasoline direct injection (up to 200 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single low-inertia turbo (BorgWarner) | |
Timing system | Chain‑driven DOHC | |
Oil type | GM‑LL‑A‑025 (SAE 5W‑30) | |
Dry weight | 112 kg |
The Vauxhall B14NET was used across Vauxhall's K/Small platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Mokka X and modified exhaust manifolds in the Astra K—and from 2018 minor ECU updates improved cold‑start emissions and valve deposit mitigation, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
The B14NET's primary reliability risk is carbon buildup on intake valves, with elevated incidence in urban-driven or short-trip vehicles. Vauxhall internal data from 2019 indicated a measurable uptick in intake cleaning interventions beyond 80,000 km, while UK DVSA MOT records show secondary failures linked to misfire-related emissions faults. Extended oil change intervals and low-quality oil significantly accelerate wear, making adherence to GM‑LL‑A‑025 oil specs and service schedules critical.
Analysis derived from Vauxhall technical bulletins (2015–2021) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The B14NET offers responsive performance and good refinement, but all units are susceptible to intake valve carbon buildup due to its GDI design. Regular oil changes with GM‑LL‑A‑025 oil and occasional highway driving help mitigate issues. With proactive maintenance, longevity beyond 180,000 km is achievable.
Top issues include intake valve carbon fouling, turbocharger wastegate rattle, high-pressure fuel pump wear, and timing chain tensioner degradation. These are well-documented in Vauxhall service bulletins TIS‑14‑07‑03 and TIS‑14‑02‑11.
It powered the Corsa E (2015–2019), Astra K (2015–2021), and Mokka X (2016–2020) in 1.4 Turbo 140 guise. Opel also used it across the same platforms in European markets. All meet Euro 6 emissions.
Yes. ECU remaps yield +15–25 kW safely, leveraging the robust turbo and internals. Stage 1 tuning is common and reliable. Significant gains require upgraded intercooler and fuel system support to avoid knock and pump wear.
In an Astra K or Corsa E, expect ~7.2 L/100km (city) and ~5.0 L/100km (highway), or about 40 mpg UK combined. Real‑world mixed driving typically returns 36–44 mpg UK, depending on condition, driving style, and traffic patterns.
Yes. The B14NET is an interference design. If the timing chain fails or jumps, piston‑to‑valve contact can cause catastrophic damage. Chain inspection every 120,000 km is recommended despite its 'lifetime' designation.
Vauxhall specifies GM‑LL‑A‑025 compliant oil (5W‑30). Always use a quality synthetic oil meeting this standard and change it every 15,000 km or 12 months to protect the turbo, timing system, and maintain engine cleanliness.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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