The Kia D4HB is a 1,396 cc, inline‑four turbo‑diesel engine produced between 2010 and 2018. It features a dual overhead camshaft (DOHC) design with 16 valves and a high-pressure common rail fuel system. This compact powerplant delivered approximately 90 PS and 220 Nm, prioritizing strong low-end torque for urban agility and fuel efficiency.
Fitted primarily to the second-generation Kia Rio (UB) and third-generation Picanto (TA), the D4HB was engineered for economical, responsive city driving with reduced emissions. It targeted eco-conscious buyers seeking minimal running costs without sacrificing drivability. Emissions compliance for its production period was managed through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), meeting Euro 5 standards.
One documented concern is premature failure of the EGR (Exhaust Gas Recirculation) valve and cooler, which can lead to reduced performance, increased emissions, and potential DPF blockage. This issue, referenced in Kia technical service bulletins for the UB Rio, is often attributed to carbon buildup from frequent short trips. Kia later addressed this with revised EGR component designs and updated ECU mapping.
Production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/6789).
The Kia D4HB is a 1,396 cc inline‑four turbo‑diesel engineered for subcompact city cars (2010-2018). It combines DOHC 16-valve architecture with a variable geometry turbocharger and common rail direct injection to deliver strong low-RPM torque and efficient cruising. Designed to meet Euro 5 standards, it balances responsive performance with low fuel consumption and emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,396 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 72.2 mm × 85.4 mm | |
| Power output | 66 kW (90 PS) @ 4,000 rpm | |
| Torque | 220 Nm @ 1,750–2,500 rpm | |
| Fuel system | Common rail direct injection (up to 1,600 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (VGT) | |
| Timing system | Chain-driven | |
| Oil type | ACEA C2/C3, SAE 5W-30 | |
| Dry weight | Not Available |
The VGT turbo provides strong low-RPM torque ideal for city driving but requires adherence to 15,000-mile oil change intervals to prevent EGR and DPF issues. ACEA C2/C3 5W-30 oil is critical due to its low-SAPS formulation, which protects the DPF from ash buildup. Vehicles used primarily for short trips are prone to EGR valve and cooler clogging; regular highway driving is recommended to initiate DPF regeneration cycles. The timing chain is generally robust but should be inspected if unusual noise is detected.
Oil Specs: Requires ACEA C2/C3 specification low-SAPS oil (Kia Owner's Manual). API CJ-4 is not recommended.
Emissions: Euro 5 certification applies to all 2010–2018 D4HB models (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all model years (Kia PT-2018).
Kia Technical Workshop Manual: UB Rio / TA Picanto (2010-2018)
Kia ETK Parts Catalogue: Document KIA-D4HB-2010
VCA Type Approval Database (VCA/EMS/6789)
The Kia D4HB was used in Kia's UB/TA platforms with transverse mounting. This engine received minor ECU updates during its production run but no major mechanical platform-specific adaptations. All applications are documented in OEM service manuals.
Locate the engine code stamped on the front of the cylinder block, near the timing chain cover (Kia Workshop Manual UB). The 8th digit of the VIN for D4HB-equipped vehicles is typically 'H'. The engine is visually identified by its compact size, aluminum DOHC cylinder head, and the presence of a variable geometry turbocharger. Critical differentiation from the petrol variant: The D4HB has a high-pressure fuel rail and injectors on the cylinder head, and an EGR valve mounted on the intake manifold. Always verify the engine code stamping before ordering parts.
The D4HB's primary reliability risk is EGR system failure, with elevated incidence in vehicles subjected to predominantly short urban journeys. Kia service data indicates a high rate of EGR valve and cooler replacements, while owner reports frequently cite DPF warning lights. Neglecting long drives for DPF regeneration or using incorrect oil makes these issues significantly more likely.
Analysis derived from Kia technical bulletins (2010-2018) and owner-reported failure data (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA D4HB.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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