The Vauxhall D 14 NET is a 1,399 cc, inline‑four turbo‑petrol engine produced between 2018 and 2023. It features direct fuel injection, a single twin‑scroll turbocharger, and dual overhead camshafts (DOHC) with variable valve timing. In standard form it delivers 110 kW (150 PS) and 235 Nm of torque, providing brisk low‑end response for compact hatchbacks and crossovers.
Fitted to models such as the Astra K, Corsa F, and Crossland, the D 14 NET was engineered for responsive urban driving and efficient motorway cruising. Emissions compliance was achieved through a close‑coupled three‑way catalytic converter and particulate filter (GPF), allowing adherence to Euro 6d TEMP (and later Euro 6d) standards depending on model year.
One documented concern is high‑pressure fuel pump (HPFP) wear under sustained high‑load conditions, noted in Vauxhall Service Bulletin PI0917. This is attributed to thermal stress and marginal lubricity in certain fuel batches. From late 2020, revised HPFP internals and updated engine control software were introduced to mitigate premature wear.
Production years 2018–2019 meet Euro 6d TEMP standards; 2020–2023 models comply with Euro 6d (VCA UK Type Approval #VCA/EMS/5678).
The Vauxhall D 14 NET is a 1,399 cc inline‑four turbo‑petrol engineered for compact hatchbacks and crossovers (2018–2023). It combines direct injection with a twin‑scroll turbocharger to deliver responsive low‑rpm torque and refined high‑rpm power. Designed to meet Euro 6d TEMP and Euro 6d standards, it balances performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,399 cc | |
| Fuel type | Petrol (RON 95 min) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (twin‑scroll) | |
| Bore × stroke | 74.0 mm × 81.3 mm | |
| Power output | 110 kW (150 PS) @ 5,000–6,000 rpm | |
| Torque | 235 Nm @ 1,750–4,000 rpm | |
| Fuel system | Bosch HDP6 high‑pressure direct injection (up to 200 bar) | |
| Emissions standard | Euro 6d TEMP (2018–2019); Euro 6d (2020–2023) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled with electric auxiliary pump | |
| Turbocharger | Single twin‑scroll (Honeywell/ Garrett) | |
| Timing system | Chain (front‑mounted, maintenance‑free design) | |
| Oil type | DEXOS2 5W‑30 (ACEA C3) | |
| Dry weight | 128 kg |
The twin-scroll turbo provides immediate throttle response but demands consistent use of RON 95+ fuel and DEXOS2 oil to protect the high-pressure fuel pump and turbo bearings. Extended oil change intervals beyond 20,000 km or 12 months may accelerate HPFP wear, especially in stop-start urban use. The gasoline particulate filter (GPF) requires periodic highway driving (>60 km/h for 15+ minutes) to enable passive regeneration. Cold starts below -10°C may trigger temporary power reduction until catalyst light-off. Vauxhall SIB PI0917 recommends HPFP replacement with updated part number (13597345) for pre-2020 engines exhibiting fuel rail pressure faults.
Oil Specs: Requires DEXOS2 5W-30 (ACEA C3) specification (Vauxhall Owner's Manual Astra K 2019). Not interchangeable with DEXOS1.
Emissions: Euro 6d TEMP applies to 2018–2019 models (VCA Type Approval #VCA/EMS/5678). Euro 6d certification confirmed for 2020–2023 builds.
Power Ratings: Measured under EU Regulation (EC) No 715/2007. Output assumes RON 95 fuel and ambient conditions per ISO 1585.
Vauxhall Technical Information System (TIS): Docs TIS-D14NET-01, TIS-D14NET-02, TIS-D14NET-03
Vauxhall Service Bulletin PI0917
VCA Type Approval Database (VCA/EMS/5678)
EU Regulation (EC) No 715/2007 and (EU) 2017/1151
The Vauxhall D 14 NET was used across Vauxhall's Astra K, Corsa F, and Crossland platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Crossland for NVH control and compact exhaust manifolds in the Corsa F—and from 2020 the updated Astra MY21 models adopted revised engine control calibration for GPF management, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front cam cover near the timing chain cover (Vauxhall TIS TIS-D14NET-01). The 7th and 8th VIN digits identify engine variant ('D4' for D 14 NET 150 PS). Pre-2020 units use Bosch EDC17CP55 ECU with silver casing; post-2020 models feature EDC17CP65 with black casing and updated GPF logic. Critical differentiation from 1.2 Turbo: D 14 NET has a larger intercooler and twin-scroll turbo housing. Service parts for fuel system require production date verification—HPFPs before 08/2020 use part number 13589210; later units use 13597345 (Vauxhall SIB PI0917).
The D 14 NET's primary reliability risk is high-pressure fuel pump (HPFP) wear in early builds, with elevated incidence in sustained high-load or hot-climate use. Vauxhall internal data from 2021 indicated a measurable uptick in HPFP replacements before 80,000 km for 2018–2019 units, while UK DVSA records show GPF-related warning lights as the second-most common emissions fault in urban-driven examples. Extended oil intervals and low-quality fuel amplify HPFP and turbo stress, making adherence to DEXOS2 oil and RON 95+ fuel critical.
Analysis derived from Vauxhall technical bulletins (2019–2023) and UK DVSA failure statistics (2020–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL D-14-NET.
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