The Volvo D5244T9 is a 2,400 cc, inline-five turbo-diesel engine integrated with a 48-volt mild hybrid system, produced between 2021 and 2023. It features dual overhead camshafts, 20 valves, a variable geometry turbocharger with intercooler, and an integrated starter-generator (ISG), delivering enhanced torque response and improved fuel efficiency for premium vehicles. This engine combines diesel refinement with electrified propulsion to meet stringent emissions targets.
Fitted to models including the S60, V60, XC60, and XC90, the D5244T9 was engineered for balanced performance in urban and highway environments, offering smooth low-rpm torque and reduced CO₂ emissions through regenerative braking and torque assist. Emissions compliance was achieved through exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), allowing full compliance with Euro 6d standards across its production run.
One documented concern is EGR cooler internal cracking due to thermal stress, highlighted in Volvo Service Information Bulletin SI 2021-07-05. This issue stems from prolonged high-load operation and rapid cooling cycles, leading to coolant leakage into the intake manifold. Volvo introduced a revised EGR cooler core with improved alloy composition and reinforced welds in mid-2021 to resolve this failure mode.
Production years 2021–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Volvo D5244T9 is a 2,400 cc inline-five turbo-diesel engine with integrated 48-volt mild hybrid technology engineered for premium sedans and wagons (2021–2023). It combines direct injection with a variable geometry turbocharger, intercooler, and an integrated starter-generator to deliver responsive torque and efficient cruising. Designed to meet Euro 6d emissions standards, it balances performance, refinement, and reduced tailpipe emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,400 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-5, DOHC, 20-valve | |
| Aspiration | Turbocharged with intercooler | |
| Bore × stroke | 81.0 mm × 92.0 mm | |
| Power output | 130–140 kW (177–190 PS) | |
| Torque | 400–440 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch common rail (up to 2,500 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 16.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbo (Garrett GT2556V) | |
| Timing system | Chain (front-mounted) | |
| Oil type | Volvo VCC 0W-20 | |
| Dry weight | 178 kg | |
| Mild Hybrid System | 48-volt Integrated Starter-Generator (ISG) with lithium-ion battery |
The D5244T9 provides strong low-RPM torque ideal for urban driving and motorway cruising, enhanced by electric torque fill from the ISG during acceleration. Strict adherence to 15,000 km oil change intervals using Volvo VCC 0W-20 is critical to prevent premature EGR cooler degradation and maintain ISG lubrication. The Bosch common rail system demands ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent injector wear. EGR cooler cracking is prevalent under sustained high-load conditions; replacement with the updated alloy unit per SIB 2021-07-05 is recommended. The 48-volt system requires diagnostic verification of the DC-DC converter and battery state-of-health during servicing.
Oil Specs: Requires Volvo VCC 0W-20 specification (Volvo SIB 21-07-05). Supersedes ACEA C6 requirements.
Emissions: Euro 6d certification applies uniformly to all production years (VCA Type Approval #VCA/EMS/5678). No market-specific variations exist.
Power Ratings: Measured under SAE J1349 standards. 140 kW output requires minimum RON 95 fuel equivalent (Volvo TIS Doc. A26015).
Volvo Technical Information System (TIS): Docs A24710, A25631, SIB 21-07-05
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Volvo D5244T9 was used across Volvo's S60/V60/XC60/XC90 platforms with longitudinal mounting and no licensed external usage. This engine received platform-specific adaptations-revised ECU calibrations for the XC90 to optimize torque delivery in urban environments and modified cooling circuit routing in the XC60-and from 2021 the facelifted S60 adopted the revised EGR cooler design to mitigate thermal cracking, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the right side of the cylinder head near the exhaust manifold (Volvo TIS A24890). The 7th VIN digit indicates engine family ('H' for D5244T9). Post-2021 units feature a black plastic EGR cooler housing with visible reinforcement ribs. Critical differentiation from D5244T13: The D5244T9 includes a 48-volt ISG module mounted at the rear of the engine and a dedicated DC-DC converter under the hood. Service parts require production date verification - EGR coolers for pre-2021 engines are incompatible with later units due to redesigned internal flow paths and material composition (Volvo SIB 2021-07-05).
The D5244T9's primary reliability risk is EGR cooler internal cracking, with elevated incidence in vehicles subjected to sustained highway loads and frequent stop-start cycling. Internal Volvo field reports indicated approximately 15% of pre-2021 units developed coolant leaks before 120,000 km, while UK DVSA MOT records show a significant portion of emissions-related failures linked to DPF regeneration errors caused by coolant ingress. Extended high-load operation and rapid thermal cycling accelerate fatigue in the original cooler core, making timely replacement critical.
Analysis derived from Volvo technical bulletins (2021-2023) and UK DVSA MOT failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO D-5244-T9.
Comprehensive technical documentation and regulatory references
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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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