The Daewoo H20D4 is a 1,998 cc, inline-four turbo-diesel engine produced between 2011 and 2016. Developed as part of the GM Medium Diesel Engine (MDE) family, it features common rail direct injection, variable geometry turbocharging (VGT), and DOHC 16-valve valvetrain. In standard tune it produces 130 kW (177 PS) and 400 Nm of torque, meeting Euro 5 emissions standards through integrated SCR and DPF systems.
Fitted primarily to the Daewoo Winstorm XLV and Rezzo MPV platforms, the H20D4 was engineered for higher-load applications including light commercial use and family transport. Emissions compliance is achieved via cooled exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling full Euro 5 certification across all variants.
One documented concern is high-pressure fuel pump (HPFP) degradation under sustained high-load operation, noted in Daewoo Service Information Bulletin DSB-2013-14. Extended towing or frequent highway driving at full load can accelerate wear in the Bosch CP4 pump. From 2014, revised lubrication routing and updated pump calibration were introduced to improve thermal management and longevity.
Daewoo
All production years (2011–2016) meet Euro 5 standards with SCR and DPF (VCA UK Type Approval #VCA/EMS/6789).
The Daewoo H20D4 is a 1,998 cc inline-four turbo-diesel engineered for mid-size SUVs and MPVs (2011-2016). It combines high-pressure common-rail injection with a variable-geometry turbocharger to deliver strong low-end torque and stable high-speed performance. Designed to meet Euro 5 standards, it integrates SCR and DPF systems for regulated emissions compliance while maintaining drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 83.0 mm × 92.0 mm | |
| Power output | 130 kW (177 PS) @ 4,000 rpm | |
| Torque | 400 Nm @ 1,800–2,600 rpm | |
| Fuel system | Bosch CP4 common-rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 (SCR + DPF) | |
| Compression ratio | 16.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Honeywell variable-geometry turbo (VGT) | |
| Timing system | Chain-driven (front-mounted) | |
| Oil type | ACEA B5 5W-30 | |
| Dry weight | 170 kg |
The H20D4 delivers robust torque ideal for loaded driving but requires consistent use of ultra-low-sulfur diesel (EN 590) to protect the Bosch CP4 fuel pump. ACEA B5 5W-30 oil must be changed every 12,000 km to maintain EGR, DPF, and SCR efficiency. Extended idling and frequent short trips increase soot accumulation, necessitating active regeneration cycles. AdBlue refill intervals are approximately every 8,000 km under mixed driving. Fuel pump longevity depends on avoiding sustained high-load operation; DSB-2013-14 recommends monitoring oil temperature and using OEM-specified coolant to prevent thermal degradation.
Oil Specs: Requires ACEA B5 5W-30 specification (Daewoo SIB DSB-2012-10). Not compatible with B4 or C3 oils.
Emissions: All 2011-2016 models meet Euro 5 via SCR+DPF (VCA #VCA/EMS/6789). No Euro 4 variant exists.
Power Ratings: Measured under SAE J1349. Output consistent across EU markets with EN 590 diesel (GM PT-D2033).
Daewoo Technical Information System (TIS): Docs HZ200, HZ201, DSB-2013-14
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Test Code
The Daewoo H20D4 was used across Daewoo's Winstorm/Rezzo platforms with transverse mounting and shared architecture with Opel and Holden variants. This engine received platform-specific adaptations-longer intake manifolds in the Winstorm XLV and reinforced mounts in the Rezzo-and from 2014 the updated fuel pump calibration introduced in Winstorm facelifts created parts interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side engine block near the exhaust manifold (Daewoo TIS HZ200). The 8th VIN digit indicates engine type ('H' for H20D4). Pre-2014 models have silver valve covers with blue gaskets; post-2014 units use black valve covers. Critical differentiation from Opel Y20DTH: Daewoo H20D4 uses Bosch CP4 pump with dual fuel lines, while Opel uses CP3 with single feed. Service parts require model-year verification—SCR-equipped variants are not compatible with base models (Daewoo SIB DSB-2013-14).
The H20D4's primary reliability risk is high-pressure fuel pump degradation under sustained load, with elevated incidence in commercial or towing applications. Internal Daewoo field reports from 2015 indicated over 12% of pre-2014 units required HPFP replacement before 160,000 km, while UK DVSA records show SCR-related faults contributing to emissions test failures in fleet vehicles. High thermal loads and poor diesel quality accelerate pump wear, making oil change adherence and coolant system maintenance critical.
Analysis derived from Daewoo technical bulletins (2011-2016) and UK DVSA failure statistics (2012-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAEWOO H20D4.
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