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, Co…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The A14NET is generally reliable with proper maintenance. Its chain-driven valvetrain is robust, but carbon buildup on intake valves can occur in city-driven cars. Using correct Dexos2 5W-30 oil and occasional highway driving greatly improve longevity. Most issues arise after 80,000 km if maintenance is neglected.
The most common issues are intake valve carbon deposits causing misfires, VVT solenoid faults due to oil contamination, turbo actuator sticking, and HPFP wear. These are documented in Vauxhall TSB‑14N‑022 and internal service data. None typically cause catastrophic failure if addressed early.
The A14NET was used in the Adam S (2014–2018), Corsa E (2014–2018), and Astra K (2015–2018), all with 1.4 Turbo trim levels. It was not used in commercial variants or licensed to other manufacturers. All applications are Euro 6 compliant.
Yes, with caution. Stage 1 ECU remaps typically yield +15–20 kW using stock hardware, but require 98 RON fuel and enhanced cooling. Stage 2 (downpipe, intercooler) can reach 170–180 PS. However, the stock turbo and fuel system have limits—excessive tuning risks HPFP or bearing failure.
Good for a turbo engine. In a Corsa E 1.4 Turbo, expect ~6.8 L/100km (city), ~4.9 L/100km (highway), or about 48 mpg UK combined. Real-world mixed driving typically returns 44–50 mpg (UK), depending on condition and driving style. Cold weather and short trips reduce efficiency.
Yes. The A14NET is an interference engine. If the timing chain were to fail (rare but possible with severe oil neglect), piston-to-valve contact would cause significant internal damage. However, the chain is designed for life under correct maintenance.
Vauxhall specifies Dexos2 5W-30 (ACEA C3) synthetic oil. This low-SAPS formulation protects the VVT system and emissions components. Oil changes every 15,000 km or annually are recommended. Never use non-Dexos2 oils, as they may cause solenoid clogging or chain wear.
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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