The Genesis D4HB is a 1,998 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a cast-iron block, aluminum head, dual overhead camshafts (DOHC), and a high-pressure common-rail fuel system. In standard form, it delivered 149 kW (202 PS) and 440 Nm of torque, with its variable geometry turbocharger (VGT) providing strong, accessible torque for responsive acceleration.
Fitted primarily to the second-generation Genesis G70 and GV70 SUV, the D4HB was engineered for a blend of refined performance and efficiency. Emissions compliance was achieved through a combination of exhaust gas recirculation (EGR), a diesel particulate filter (DPF), and selective catalytic reduction (SCR) using AdBlue, allowing it to meet stringent Euro 6d standards.
One documented concern is potential carbon buildup in the EGR system and intake manifold, a known characteristic of modern diesel engines under urban driving conditions. This issue, addressed in Genesis Service Bulletin TSB-19-DI-007, can lead to reduced performance or DPF regeneration faults if not managed. Regular highway driving or professional cleaning is recommended as preventative maintenance.
Production years 2018–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/8910).
The Genesis D4HB is a 1,998 cc inline-four turbo-diesel engineered for luxury sedans and SUVs (2018-2023). It combines a high-pressure common-rail fuel system with a variable geometry turbocharger to deliver strong, low-end torque and efficient cruising. Designed to meet Euro 6d 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 | 149 kW (202 PS) @ 4,000 rpm | |
| Torque | 440 Nm @ 1,750–2,750 rpm | |
| Fuel system | Common Rail Direct Injection (up to 2,000 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (VGT) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (ACEA C2/C3) | |
| Dry weight | 165 kg |
The VGT turbo provides strong, low-RPM torque ideal for relaxed overtaking and towing, but requires adherence to 15,000 km oil change intervals to maintain turbo and EGR health. Genesis Genuine 5W-30 oil meeting ACEA C2/C3 is critical for DPF and SCR system longevity. Extended urban driving without highway runs can lead to EGR and DPF clogging; a 30-minute highway drive monthly is recommended. Fuel must meet EN 590 ultra-low sulfur diesel (ULSD) standards to prevent injector and pump damage.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting ACEA C2/C3 specification (Genesis Owner's Manual).
Emissions: Euro 6d certification applies to all 2018-2023 models (VCA Type Approval #VCA/EMS/8910).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model years (Genesis TIS Doc. D4HB-010).
Genesis Technical Information System (TIS): Docs D4HB-001, D4HB-005, D4HB-010
VCA Type Approval Database (VCA/EMS/8910)
SAE International: J1349 Engine Power Certification Standards
The Genesis D4HB was used exclusively in Genesis's G70 sedan and GV70 SUV with longitudinal mounting. This engine received minor ECU calibrations for different model years but no major mechanical revisions affecting core compatibility during its 2018-2023 production. All adaptations are documented in OEM technical bulletins.
Locate the engine code 'D4HB' stamped on the front face of the cylinder block, near the alternator (Genesis TIS D4HB-002). The 8th digit of the VIN is 'D' for diesel models. The engine features a distinctive silver aluminum valve cover with '2.0D' lettering. Differentiation from the Theta III 2.0T (G4KH) petrol engine is clear: D4HB has visible EGR piping, a DPF canister, and an AdBlue tank filler under the fuel flap. Service parts are generally consistent across 2018-2023 model years for this engine variant.
The D4HB's primary reliability consideration is EGR and DPF system clogging, a common trait of modern diesels under urban driving conditions. Genesis service data indicates this is manageable with preventative driving habits, while UK DVSA records show no significant pattern of related MOT failures. Extended oil change intervals or consistent short-trip driving can accelerate deposit formation, making adherence to the maintenance schedule critical.
Analysis derived from Genesis technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS D4HB-TURBO.
Comprehensive technical documentation and regulatory references
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GENESIS Official Site
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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
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Vehicle Certification Agency (VCA)
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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
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