The Volvo D4204T6 is a 1,969 cc, inline‑four twin‑turbo diesel engine produced between 2016 and 2020. It features a DOHC 16 — valve architecture with sequential twin — turbocharging and high — pressure common rail direct injection. In its standard tune, it produced 173 kW (235 PS) and 480 Nm of torque, offering exceptional low — end response and strong, sustained power.
Fitted primarily to the second — generation XC90 and S90/V90 models, the D4204T6 was engineered for dynam…
Production years 2016–2020 meet Euro 6c standards (VCA UK Type Approval #VCA/EMS/VOLVO-D42T6).
The Volvo D4204T6 is a 1,969 cc inline‑four twin-turbo diesel engineered for premium SUVs and estates (2016-2020). It combines sequential twin-turbocharging with common-rail direct injection to deliver exceptional low-RPM torque and seamless power delivery. Designed to meet stringent Euro 6c standards, it balances high performance with low emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,969 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Twin-Turbocharged | |
Bore × stroke | 82.0 mm × 93.2 mm | |
Power output | 173 kW (235 PS) @ 4,250 rpm | |
Torque | 480 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch high-pressure common rail (up to 2,000 bar) | |
Emissions standard | Euro 6c | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Sequential twin-turbo (Honeywell HP + LP units) | |
Timing system | Chain-driven | |
Oil type | Volvo VCC 95200377 (SAE 0W‑20) | |
Dry weight | 172 kg |
The Volvo D4204T6 was used across Volvo's SPA platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the XC90 for enhanced refinement. All adaptations are documented in OEM technical bulletins.
The D4204T6's primary reliability risk is high-pressure fuel pump failure, with elevated incidence linked to fuel quality or extended service intervals. Volvo service data indicates a notable number of replacements were performed, while owner reports frequently cite misfires and rough running. Contaminated or low-quality diesel accelerates internal pump wear, making fuel source and maintenance adherence critical.
Analysis derived from Volvo technical bulletins (2016-2020) and aggregated owner-reported failure data (2018-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The D4204T6 is a powerful and refined engine, but its complexity demands diligent maintenance. The main concerns are the high-pressure fuel pump and DPF under short-trip conditions. With strict oil changes, using only high-quality diesel/AdBlue, and regular highway driving, these engines can reliably exceed 250,000 km.
The top issues are high-pressure fuel pump failure causing misfires, Diesel Particulate Filter (DPF) clogging from short trips, AdBlue injector crystallization, and turbocharger wastegate actuator failure. These are well-covered in Volvo service bulletins.
This high-output 2.0L twin-turbo diesel engine, badged as 'D5', was used in the second-generation XC90 (2016-2020), the S90 sedan (2016-2020), and the V90 estate (2016-2020). It was Volvo's top-tier diesel option for these premium models during this period.
Yes, the D4204T6 responds very well to ECU remapping. Stage 1 tunes can safely increase output to around 200-220 kW and 520-550 Nm by optimizing fuel, boost, and EGR maps. The stock internals and twin-turbo setup handle increased pressure well. Ensure the fuel pump and cooling systems are in good condition before tuning.
Expect real-world figures around 7.5-8.5 L/100km (38-33 mpg UK) in combined driving for the XC90 D5. Highway cruising can drop to ~6.5 L/100km (43 mpg UK), while city driving can exceed 9.5 L/100km (30 mpg UK). Fuel economy is heavily impacted by DPF regeneration cycles and driving style.
Yes. The D4204T6 is an interference engine. If the timing chain were to fail (though very rare), the pistons would collide with the open valves, causing catastrophic internal damage. The chain is designed for the engine's lifetime with proper maintenance.
Volvo specifies a 0W-20 synthetic oil meeting their VCC 95200377 standard. This low-viscosity oil is crucial for protecting the twin turbos, ensuring efficient DPF operation, and optimizing fuel economy. Change intervals should not exceed 15,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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VOLVO 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
Type-approval guidance and documentation.
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