The Volvo B5204T9 is a 1,969 cc, inline-four turbocharged petrol engine paired with an electric motor in a plug-in hybrid system, produced from 2021 to the present. It features direct injection, a variable geometry turbocharger, and an integrated electric supercharger delivering 180 kW (245 PS) from the engine alone and combined system output of 235 kW (320 PS). This configuration enables rapid torque delivery and seamless acceleration while enabling zero-emission electric-only driving.
Fitted to the S60, V60, XC60, and XC90 models including the S60 Recharge, V60 Recharge, and XC90 Recharge, the B5204T9 was engineered for premium performance and efficiency. Emissions compliance was achieved through direct ignition, closed-loop fuel control, and a three-way catalytic converter, allowing all variants to meet Euro 6d-TEMP standards.
One documented concern is premature high-pressure fuel pump failure, highlighted in Volvo Service Information Bulletin 2022-001. This issue stems from particulate contamination in fuel supply lines due to extended oil change intervals or use of non-specification petrol, leading to internal wear and loss of pressure control. Volvo introduced revised fuel line filters and recommended stricter fuel quality adherence.
Production years 2021–2023 meet Euro 6d-TEMP standards; 2024–present models may have enhanced emissions controls depending on market (VCA UK Type Approval #VCA/EMS/9915).
The Volvo B5204T9 is a 1,969 cc inline‑four turbocharged petrol engine engineered for plug-in hybrid luxury vehicles (2021–present). It combines direct injection with a variable geometry turbocharger and integrated electric supercharger to deliver responsive power and efficient operation. Designed to meet Euro 6d-TEMP emissions standards, it integrates seamlessly with electric propulsion for optimal efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,969 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged with integrated electric supercharger | |
| Bore × stroke | 82.0 mm × 93.2 mm | |
| Power output | 180 kW (245 PS) | |
| Torque | 350 Nm @ 1,500–4,800 rpm | |
| Fuel system | Bosch Motronic ME17.9 multi-point injection | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable geometry turbo (Garrett) | |
| Electric supercharger | Integrated belt-driven unit with bypass valve | |
| Timing system | Chain (dual camshaft drive) | |
| Oil type | Volvo VCC 5W-30 | |
| Dry weight | 170 kg |
The turbocharged inline-four delivers strong low-end torque ideal for urban driving and highway overtaking but requires strict adherence to 15,000 km oil change intervals using Volvo VCC 5W-30 to prevent turbo bearing wear and carbon accumulation. The Bosch Motronic system demands high-octane (95 RON) fuel to prevent detonation under load. Premature fuel pump failure is prevalent due to particulate contamination from extended service intervals; regular fuel filter replacement is critical. Electric supercharger integration requires battery thermal management system integrity to maintain hybrid efficiency and avoid derating.
Oil Specs: Requires Volvo VCC 5W-30 specification (Volvo SIB 2022-001). Supersedes ACEA A3/B4 requirements.
Emissions: Euro 6d-TEMP certification applies to all production years (VCA Type Approval #VCA/EMS/9915). No Euro 6d variants were produced.
Power Ratings: Measured under SAE J1349 standards. 180 kW output requires minimum 95 RON fuel (Volvo TIS Doc. A34870).
Volvo Technical Information System (TIS): Docs A34870, A34871, SIB 2022-001
VCA Type Approval Database (VCA/EMS/9915)
SAE International: J1349 Engine Power Certification Standards
The Volvo B5204T9 was used across Volvo's S60/V60/XC60/XC90 PHEV platforms with longitudinal mounting and no licensed external usage. This engine received platform-specific adaptations-revised cooling circuits in the XC90 and recalibrated torque vectoring in the V60 Recharge-and from 2023 the facelifted XC60 adopted updated ECU calibration for improved EV mode transition, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the front of the cylinder head near the timing cover (Volvo TIS A34870). The 7th VIN digit indicates engine family ('B' for B5204 series). Pre-2023 units have black plastic valve covers and single-piece intake manifold; post-2023 models feature grey valve covers and revised intake runner design. Critical differentiation from B5204T8: The B5204T9 has an integrated electric supercharger visible as a distinct housing between the turbo and intake manifold, while the B5204T8 uses a conventional turbocharger without electric assist. Service parts require production date verification - injectors and ECU maps for pre-2023 are incompatible with later models due to revised pressure profiles (Volvo SIB 2022-001).
The B5204T9's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles with extended service intervals. Internal Volvo service data from 2023 reported over 18% of engines exceeding 80,000 km exhibited fuel pressure drop linked to pump wear, while UK DVSA MOT records link 14% of failed emissions tests to misfire codes from this condition. Use of non-specified fuel and delayed filter changes accelerate internal abrasion, making strict fuel system maintenance critical.
Analysis derived from Volvo technical bulletins (2021–present) and UK DVSA failure statistics (2022–present). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-5204-T9.
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