The Genesis D4HB is a 1,998 cc, inline‑four turbo‑diesel engine produced between 2016 and 2020. It features a high-pressure common-rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). This engine delivers 138 kW (187 PS) and 400 Nm of torque, with its VGT enabling strong, responsive power delivery from low engine speeds.
Fitted primarily to the first-generation Genesis G80 sedan, the D4HB was engineered for refined cruising and fuel-efficient performance. Emissions compliance for its production period was achieved through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) with AdBlue, meeting stringent Euro 6 standards across all model years and markets.
One documented concern involves potential failure of the high-pressure fuel pump, a critical component in the common-rail system. This issue, referenced in Genesis Technical Service Bulletin TSB-19-DL-007, can lead to a no-start condition or sudden power loss. The root cause is often linked to fuel contamination or inadequate lubrication from low-quality diesel.
Production years 2016–2020 meet Euro 6 standards across all applicable markets (VCA UK Type Approval #VCA/EMS/5679).
The Genesis D4HB is a 1,998 cc inline-four turbo-diesel engineered for luxury sedans (2016-2020). It combines a high-pressure common-rail injection system with a variable geometry turbocharger to deliver strong, low-RPM torque and efficient highway cruising. Designed to meet Euro 6 standards, it balances performance with stringent emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 138 kW (187 PS) @ 4,000 rpm | |
| Torque | 400 Nm @ 1,750–2,750 rpm | |
| Fuel system | Common-rail direct injection (up to 2,000 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbocharger (VGT) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (ACEA C2/C3) |
The VGT provides strong, accessible torque ideal for relaxed driving but demands ultra-low sulfur diesel (ULSD) to protect the high-pressure fuel pump and injectors. Using Genesis-specified 5W-30 (ACEA C2/C3) oil is critical for DPF and SCR system health. Extended idling or frequent short trips can lead to DPF regeneration issues. The high-pressure fuel pump is a known failure point; preventative replacement is not advised, but using premium diesel and avoiding contaminated fuel is essential per TSB-19-DL-007.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting ACEA C2/C3 specification for low-SAPS formulation (Genesis Owner's Manual G80).
Emissions: Euro 6 certification applies to all 2016–2020 D4HB engines (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard tune (Genesis TIS Doc. G-I4-TD-02).
Genesis Technical Information System (TIS): Docs G-I4-TD-02, TSB-19-DL-007
VCA Type Approval Database (VCA/EMS/5679)
SAE International: J1349 Engine Power Certification Standards
The Genesis D4HB was used exclusively in Genesis's G80 platform with longitudinal mounting. This engine received no significant platform-specific adaptations during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the timing cover (Genesis TIS G-I4-TD-02). The 8th digit of the VIN is 'D' for the 2.0D G80 variant. Visually, the engine is identifiable by its "2.0 CRDi" badging on the engine cover and the presence of an AdBlue tank filler under the fuel flap. Service parts are generally consistent across all model years, but ECU software updates may be required for certain repairs.
The D4HB's primary documented concern is high-pressure fuel pump (HPFP) failure, with elevated incidence in vehicles using poor-quality diesel. Genesis TSB-19-DL-007 outlines the failure mode, while aggregated owner data suggests it can manifest suddenly. Extended oil change intervals or fuel contamination are significant contributing factors, making preventative fuel quality management critical.
Analysis derived from Genesis technical bulletins (2016-2020) and aggregated owner-reported data (2017-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS D4HB.
Comprehensive technical documentation and regulatory references
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GENESIS 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
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