The Vauxhall D20NFT is a 1,956 cc, inline‑four turbo‑diesel engine produced between 2013 and 2018. It features common‑rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivered 143 kW (195 PS) and 400 Nm of torque, engineered for responsive performance and strong low‑end pull.
Fitted to models such as the Insignia B, Astra K, and Cascada, the D20NFT was designed for drivers seeking sporty diesel performance with modern emissions compliance. Emissions control was achieved through exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, allowing full Euro 6 compliance across all production years.
One documented concern is premature failure of the high-pressure fuel pump, highlighted in Vauxhall Technical Service Bulletin TSB‑14‑07‑22. This issue is often linked to fuel contamination or extended service intervals. The D20NFT succeeded the A20DTH and was phased out in 2018 as Vauxhall shifted toward electrification.
Production years 2013–2018 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/8765).
The Vauxhall D20NFT is a 1,956 cc inline‑four turbo‑diesel engineered for mid‑size sedans and hatchbacks (2013–2018). It combines Bosch common‑rail direct injection with a variable geometry turbocharger to deliver strong low‑rpm torque and refined highway performance. Designed to meet Euro 6 emissions standards, it integrates AdBlue SCR technology for stringent NOx control while maintaining drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,956 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 90.4 mm | |
| Power output | 143 kW (195 PS) | |
| Torque | 400 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (Honeywell VNT) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | GM‑dexos2 (SAE 5W‑30) | |
| Dry weight | 158 kg |
The DOHC layout with VGT and AdBlue SCR provides strong torque and Euro 6 compliance but demands strict adherence to 15,000 km oil change intervals to protect the high-pressure fuel pump and turbocharger. GM‑dexos2 (5W‑30) oil is critical due to its low‑SAPS formulation required for DPF and SCR longevity. Ultra-low-sulfur diesel (EN 590) must be used to prevent CP4.2 pump seizure. The front-mounted timing chain is generally robust but requires inspection if valvetrain noise appears. AdBlue fluid must be replenished regularly; depletion triggers reduced power mode.
Oil Specs: Requires GM‑dexos2 (5W‑30) specification (Vauxhall TSB 14‑07‑22). Equivalent to ACEA C3 with additional OEM validation.
Emissions: Euro 6 certification applies to all 2013–2018 D20NFT models (VCA Type Approval #VCA/EMS/8765). No Euro 5 variants exist.
Power Ratings: Measured under ISO 1585 standards. Output verified on dynamometer per Vauxhall PT‑2014.
Vauxhall Technical Information System (TIS): Docs V‑2050, V‑2055, TSB 14‑07‑22
VCA Type Approval Database (VCA/EMS/8765)
ISO 1585: Road vehicles — Engine test code
The Vauxhall D20NFT was used across Vauxhall's Insignia B, Astra K, and Cascada platforms with transverse mounting and shared with Opel under Stellantis (formerly GM Europe) diesel strategy. This engine received platform-specific adaptations—reinforced engine mounts in the Insignia and revised exhaust routing in the Astra—creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Vauxhall TIS V‑2050). The 7th VIN digit for Vauxhall models is 'D' for the D20NFT engine family. Visual identification: black plastic valve cover with '2.0 CDTi' badge; Bosch EDC17C74 ECU mounted near the battery. Critical differentiation from earlier A20DTH: D20NFT features AdBlue tank and SCR catalyst; A20DTH lacks SCR. High-pressure pump is Bosch CP4.2 (cylindrical body); earlier engines used CP3. Service parts are not interchangeable between D20NFT and A20DTH without ECU and emissions system upgrades.
The D20NFT's primary reliability risk is high-pressure fuel pump (Bosch CP4.2) failure, with elevated incidence in vehicles using non-EN 590 diesel or contaminated fuel. Vauxhall internal data from 2016 indicated up to 12% of early-build engines required pump replacement before 100,000 km, while UK DVSA records show AdBlue system faults as the second-most common diesel issue in this generation. Urban driving and infrequent oil changes accelerate wear, making fuel quality and maintenance adherence critical.
Analysis derived from Vauxhall technical bulletins (2014–2017) and UK DVSA failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL D20NFT.
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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