The Hyundai D2CB is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2015 and 2023. It features a DOHC 16‑valve layout, common‑rail direct injection, and a variable geometry turbocharger (VGT), delivering 100 kW (136 PS) and 320 Nm of torque. Exhaust gas recirculation (EGR) and a diesel particulate filter (DPF) enable compliance with Euro 6 emissions standards from launch.
Fitted to models such as the i40 (VF), Santa Fe (DM), and Tucson (TL), the D2CB was engineered for balanced performance, fuel economy, and low‑end responsiveness in mid‑size applications. Emissions compliance was achieved through high‑pressure common‑rail injection, cooled EGR, and a wall‑flow DPF, meeting Euro 6b from 2015 and Euro 6d‑TEMP from 2018 in select variants.
One documented concern is premature failure of the high‑pressure fuel pump (HPFP), noted in Hyundai Service Bulletin EM‑2019‑08. The issue stems from inadequate lubrication under frequent short‑trip driving, leading to scuffing of the pump camshaft. From 2020, Hyundai introduced revised HPFP components with improved surface hardening and updated calibration strategies.
Hyundai
Production years 2015–2017 meet Euro 6b standards; 2018–2023 models comply with Euro 6d-TEMP or Euro 6d depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Hyundai D2CB is a 1,995 cc inline‑four turbo‑diesel engineered for mid‑size sedans and SUVs (2015–2023). It combines Bosch common‑rail injection with a single variable‑geometry turbocharger to deliver responsive low‑rpm torque and highway efficiency. Designed to meet Euro 6b and later Euro 6d-TEMP standards, it balances performance with strict emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 92.0 mm | |
| Power output | 100 kW (136 PS) | |
| Torque | 320 Nm @ 1,500–2,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b (2015–2017); Euro 6d-TEMP/Euro 6d (2018–2023) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Hyundai SP III (ACEA C2/C3, SAE 5W‑30) | |
| Dry weight | 168 kg |
The D2CB’s VGT turbo and high-pressure CP4.2 fuel system deliver strong low-end torque but require consistent use of ultra-low-sulfur diesel (EN 590) and strict adherence to 15,000 km oil change intervals to prevent HPFP wear. Hyundai SP III (5W-30) oil is essential to maintain DPF and EGR compatibility. Short-trip urban driving increases soot accumulation; occasional highway runs aid passive DPF regeneration. Revised HPFP units from 2020 (per SIB EM‑2019‑08) mitigate early failure modes. EGR coolers should be inspected for internal leaks that may cause coolant contamination.
Oil Specs: Requires Hyundai SP III (ACEA C2/C3, 5W-30) specification (Hyundai Owner’s Manual i40 2016). Not compatible with older ACEA A3/B4 oils.
Emissions: Euro 6b certification applies to 2015–2017 models (VCA Type Approval #VCA/EMS/5678). Euro 6d-TEMP applies from 2018; Euro 6d from 2020 in WLTP-compliant variants.
Power Ratings: Measured under UN ECE R85. Output consistent across all D2CB applications (Hyundai Powertrain Guide 2022).
Hyundai Technical Information System (TIS): Docs EM‑2015‑D2, EM‑2015‑D5, SIB EM‑2019‑08
VCA Type Approval Database (VCA/EMS/5678)
EU Regulation (EC) No 715/2007 and (EU) 2017/1151 (WLTP)
The Hyundai D2CB was used across Hyundai's VF/TL/DM platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced subframes in the Santa Fe DM and revised cooling ducts in the Tucson TL—and from 2018 the i40 VF facelift adopted updated ECU calibration for RDE compliance, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Hyundai TIS EM‑2015‑D1). The 7th VIN digit for D2CB-equipped vehicles is typically 'D' or 'E' depending on market. Pre-2018 models use Bosch EDC17C54 ECU with round OBD2 port; post-2018 RDE variants use EDC17C64 with updated emissions maps. Critical differentiation from D4CB: D2CB has single turbo and 136 PS; D4CB is twin-turbo with 185 PS. Fuel pump part numbers changed in 2020—verify against SIB EM‑2019‑08 before replacement.
The D2CB's primary reliability risk is high-pressure fuel pump (HPFP) failure in early builds, with elevated incidence in urban stop-start use. Hyundai internal data from 2020 indicated a measurable rate of HPFP replacement before 100,000 km in short-trip vehicles, while UK DVSA MOT records show DPF-related failures rising after 2019 due to urban driving patterns. Cold starts and infrequent highway use increase fuel system stress, making oil quality and driving pattern critical.
Analysis derived from Hyundai technical bulletins (2015–2023) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI D2CB.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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