The Vauxhall A14NET is a 1,364 cc, inline‑four turbocharged petrol engine produced between 2013 and 2018. It features double overhead camshafts (DOHC), 16 valves, variable valve timing (VVT) on both intake and exhaust camshafts, and direct fuel injection (SIDI). In standard form it delivered 103 kW (140 PS) at 4,900 rpm and 200 Nm of torque at 1,850–4,900 rpm, offering responsive urban performance with strong mid-range flexibility.
Fitted to models such as the Adam S, Corsa E, and Astra K, the A14NET was engineered for compact performance applications with an emphasis on drivability, fuel efficiency, and emissions compliance. Emissions control was achieved through direct injection, a single-scroll turbocharger, and a close‑coupled three‑way catalytic converter, enabling Euro 6 compliance across all production years.
One documented concern is carbon buildup on intake valves due to the portless direct injection system’s inability to clean valve stems, noted in Vauxhall Technical Service Bulletin TSB‑14N‑022. This issue, exacerbated by frequent short trips, can lead to rough idle or misfires after extended low‑speed operation. From 2016, revised ECU calibrations improved cold‑start enrichment strategies to mitigate deposit formation.
All production years 2013–2018 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/5678).
The Vauxhall A14NET is a 1,364 cc inline‑four turbocharged petrol engine engineered for subcompact and compact vehicles (2013–2018). It combines direct fuel injection with a single-scroll turbocharger and dual-VVT to deliver responsive torque and fuel efficiency. Designed to meet Euro 6 emissions standards, it balances urban drivability with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,364 cc | |
| Fuel type | Petrol (Unleaded, 95 RON minimum) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 74.0 mm × 79.4 mm | |
| Power output | 103 kW (140 PS) @ 4,900 rpm | |
| Torque | 200 Nm @ 1,850–4,900 rpm | |
| Fuel system | Bosch HDP5 high-pressure direct injection (up to 200 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single-scroll turbo (Honeywell GT12) | |
| Timing system | Chain‑driven DOHC with dual VVT (intake & exhaust) | |
| Oil type | Dexos2 5W‑30 (ACEA C3) | |
| Dry weight | 105 kg |
The turbocharged direct-injection design provides strong low-end torque ideal for city and mixed driving but requires adherence to 15,000 km oil change intervals using Dexos2 5W-30 to maintain VVT solenoid function and chain longevity. Direct injection eliminates fuel washing over intake valves, so carbon buildup occurs over time—periodic induction cleaning is recommended after 80,000 km in stop-start use. The timing chain is designed for life but relies on correct oil viscosity; using non-Dexos2 oils risks premature wear. ECU updates from 2016 improve cold-start calibration to reduce deposit formation per TSB‑14N‑022.
Oil Specs: Requires GM Dexos2 5W-30 (ACEA C3) specification (Vauxhall TSB‑14N‑022). Not interchangeable with older GM-LL-A-025 oils.
Emissions: Euro 6 certification applies to all 2013–2018 A14NET engines (VCA Type Approval #VCA/EMS/5678). No market variants deviate from this standard.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all applications (Vauxhall TIS Doc. V‑A14NET‑01).
Vauxhall Technical Information System (TIS): Docs V‑A14NET‑01, V14N‑7801
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall A14NET was used across Vauxhall's GM Gamma III platform with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Adam S and compact accessory drive in the Corsa E—and from 2016 the Astra K facelift adopted updated ECU calibrations for emissions, 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 exhaust manifold (Vauxhall TIS V‑A14NET‑01). The 7th VIN digit is 'M' for 1.4L turbo petrol engines in Corsa E and Astra K. Visual identification: black plastic cam cover with '1.4T' embossed; high-pressure fuel rail visible on intake side; single-scroll turbo with integrated exhaust manifold. Critical differentiation from A14XER: A14NET uses direct injection and turbocharging, lacks port injectors, and has distinct ECU part number (Bosch 0285000230). Software updates post-2016 require matching ECU and instrument cluster per TSB‑14N‑022.
The A14NET's primary reliability risk is intake valve carbon buildup due to direct injection, with elevated incidence in high-mileage city-driven vehicles. Vauxhall internal data from 2017 indicated a measurable increase in misfire-related warranty claims after 70,000 km in low-speed duty cycles, while UK DVSA MOT statistics show infrequent emissions failures but occasional lambda sensor drift linked to rich mixture adaptation. Extended idling and short trips accelerate deposit formation, making periodic induction cleaning and correct oil specification critical.
Analysis derived from Vauxhall technical bulletins (2014–2018) and UK DVSA failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL A-14-NET.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
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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)
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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.
GOV.UK: Vehicle Approval
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VCA Certification Portal
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