The Vauxhall B20NFT is a 1,995 cc, inline‑four turbo‑charged diesel engine produced between 2018 and 2023. It features dual overhead camshafts (DOHC), 16 valves, and high‑pressure common‑rail direct fuel injection. In standard form it delivered 132 kW (180 PS) at 4,000 rpm and 400 Nm of torque at 1,750 rpm, offering strong low‑end pull and refined motorway cruising.
Fitted to premium models such as the Insignia B, Astra K, and Grandland X, the B20NFT was engineered for responsive performance and compliance with stringent emissions regulations. Emissions compliance was achieved through a diesel particulate filter (DPF), selective catalytic reduction (SCR) with AdBlue injection, and cooled exhaust gas recirculation (EGR), allowing full Euro 6d‑TEMP certification across all production years.
One documented concern is premature wear of the high-pressure fuel pump drive lobe on the camshaft, which can lead to pump failure and loss of rail pressure. This issue, referenced in Vauxhall Technical Service Bulletin TSB‑18‑11‑05, is attributed to marginal lubrication under sustained high-load conditions. From 2020, revised camshaft metallurgy and updated oil formulations were introduced to mitigate this wear mode.
All production years (2018–2023) meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/2018/1427).
The Vauxhall B20NFT is a 1,995 cc inline‑four turbo‑diesel engineered for mid‑size and SUV applications (2018–2023). It combines DOHC architecture with a variable-geometry turbocharger and AdBlue-based SCR aftertreatment to deliver strong torque and low emissions. Designed to meet Euro 6d-TEMP standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel (EN 590) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 132 kW (180 PS) @ 4,000 rpm | |
| Torque | 400 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,500 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable‑geometry turbo (VGT, BorgWarner) | |
| Timing system | Chain (front‑mounted, maintenance‑free design) | |
| Oil type | GM‑dexos2™ (SAE 0W‑30 or 5W‑30) | |
| Dry weight | 148 kg |
The B20NFT delivers strong, immediate torque ideal for both urban and motorway use but requires strict adherence to 15,000 km oil change intervals using GM‑dexos2™ (0W‑30 or 5W‑30) oil to protect the high-pressure fuel pump drive lobe on the camshaft. Ultra-low-sulfur diesel (EN 590) and regular AdBlue top-ups are mandatory—SCR system faults can trigger limp mode. Early detection of fuel pressure drop or hard starting is critical—per TSB‑18‑11‑05, cam lobe wear often precedes complete CP4.2 pump failure. Avoid extended idling and ensure DPF regeneration cycles complete through sustained highway driving.
Oil Specs: Requires GM‑dexos2™ specification (Vauxhall Owner’s Manual, 2019). Equivalent to ACEA C2/C3 for aftertreatment compatibility.
Emissions: Euro 6d-TEMP certification applies to all 2018–2023 B20NFT units (VCA Type Approval #VCA/EMS/2018/1427).
Power Ratings: Measured under ISO 1585 standards. Power output assumes EN 590 diesel and ambient conditions per EU Regulation (EC) No 715/2007.
Vauxhall Technical Information System (TIS): Docs TIS‑B20‑101 to TIS‑B20‑104
Vauxhall Service Bulletin TSB‑18‑11‑05
VCA Type Approval Database (VCA/EMS/2018/1427)
ISO 1585: Road vehicles — Engine test code
The Vauxhall B20NFT was used across Vauxhall's Insignia B, Astra K, and Grandland X platforms with transverse mounting and shared with Opel and Peugeot under Stellantis’ global diesel strategy. This engine received platform-specific adaptations—reinforced mounts in the Grandland X and revised intake manifolds in the Insignia B—and from 2020 minor camshaft and ECU updates were introduced to address fuel pump wear, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Vauxhall TIS TIS‑B20‑106). The 8th VIN digit indicates engine displacement ('2' for 2.0L diesel). B20NFT units feature a black plastic intake manifold with 'CDTi' branding and a Bosch EDC17C74 ECU mounted near the firewall. Critical differentiation from B15DTH: B20NFT has 1,995 cc displacement and SCR/AdBlue system; B15DTH is 1,499 cc without AdBlue. High-pressure fuel pump is driven off the exhaust camshaft—inspect cam lobe if rail pressure drops.
The B20NFT's primary reliability risk is camshaft lobe wear driving the high-pressure fuel pump, with elevated incidence in vehicles subjected to frequent high-load operation or delayed oil changes. Vauxhall internal durability reports from 2021 indicated measurable cam wear in engines exceeding 100,000 km without adherence to service intervals, while UK DVSA MOT records show SCR/AdBlue system faults as a leading cause of emissions-related advisories in Euro 6 diesel Insignia and Grandland X models. Extended oil intervals and low-quality oil increase cam stress, making oil specification and change frequency critical.
Analysis derived from Vauxhall technical bulletins (2018–2023) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL B20NFT.
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