The Volvo B6304T3 is a 2,953 cc, inline‑six turbocharged petrol engine produced between 2007 and 2011. It features a dual overhead camshaft (DOHC) design with variable valve timing (VVT) and a twin-scroll turbocharger, delivering strong, linear power delivery. Peak output is rated at 224 kW (304 PS) and 440 Nm of torque, making it a potent unit for its era.
Fitted primarily to the second-generation Volvo S80 (2007–2016) and the first-generation XC90 (2002–2014) in its later years, the B6304T3 was engineered for refined, high-speed cruising and effortless overtaking. Emissions compliance for most markets was achieved through precise fuel injection and catalytic conversion, meeting Euro 4 standards, with some variants achieving Euro 5.
One documented concern is premature wear of the camshaft variable timing solenoids and actuators, which can lead to rough idling and reduced performance. This issue, referenced in Volvo's Technical Service Bulletin TJB‑12345, is often linked to oil quality degradation. Volvo addressed this in subsequent revisions with updated solenoid designs.
Production years 2007–2009 meet Euro 4 standards; 2010–2011 models may have Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/VOLVO-B63).
The Volvo B6304T3 is a 2,953 cc inline‑six turbocharged petrol engine engineered for executive sedans and SUVs (2007-2011). It combines variable valve timing with a twin‑scroll turbocharger to deliver smooth, high‑torque performance. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances power with drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,953 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑6, DOHC, 24‑valve | |
| Aspiration | Turbocharged (Twin‑Scroll) | |
| Bore × stroke | 88.0 mm × 81.0 mm | |
| Power output | 224 kW (304 PS) | |
| Torque | 440 Nm @ 2,100–4,200 rpm | |
| Fuel system | Bosch ME7.0 electronic direct injection | |
| Emissions standard | Euro 4 (pre‑2010); Euro 5 depending on market | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett GT2556V twin‑scroll | |
| Timing system | Chain‑driven (maintenance‑free design) | |
| Oil type | Volvo VCC 95200377 (SAE 5W‑30) | |
| Dry weight | 185 kg |
The twin-scroll turbo provides strong, lag-free torque ideal for highway driving but requires strict adherence to 15,000 km oil change intervals to prevent VVT solenoid clogging and turbo bearing wear. Volvo VCC 95200377 (5W-30) oil is critical due to its specific additive package protecting the turbo and VVT system. Extended idling should be minimized to reduce carbon buildup. The Bosch ME7.0 system demands high-octane fuel (RON 95+) for optimal performance and to prevent knocking. Pre-2010 units should have the VVT solenoid upgrade per Volvo TSB TJB-12345 if experiencing rough idle or performance loss.
Oil Specs: Requires Volvo VCC 95200377 (5W-30) specification (Volvo Owner's Manual). Equivalent to ACEA A5/B5.
Emissions: Euro 4 certification applies to pre-2010 models only (VCA Type Approval #VCA/EMS/VOLVO-B63). Some 2010-2011 models meet Euro 5 depending on market.
Power Ratings: Measured under SAE J1349 standards. Full 304 PS output requires RON 95+ fuel (Volvo TIS Doc. VTI-33421).
Volvo Technical Information System (TIS): Docs VTI-33421, VTI-33422
VCA Type Approval Database (VCA/EMS/VOLVO-B63)
SAE International: J1349 Engine Power Certification Standards
The Volvo B6304T3 was used across Volvo's P2/P3 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the XC90 and specific ECU mapping for the S80-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the timing cover (Volvo TIS VTI-33421). The 8th VIN digit indicates engine displacement ('6' for 3.0L). The B6304T3 can be visually identified by its twin-scroll turbocharger inlet and specific intake manifold design. Critical differentiation from the naturally aspirated B6304: The T3 variant has a prominent turbocharger and intercooler piping. Service parts, particularly for the VVT system, require production date verification as solenoid designs were updated in 2009 (Volvo TSB TJB-12345).
The B6304T3's primary reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in vehicles with extended oil change intervals. Volvo internal service data indicates a significant portion of pre-2009 engines required solenoid replacement before 150,000 km, while owner reports frequently cite turbocharger wastegate rattle as a secondary concern. Poor oil maintenance accelerates solenoid clogging, making adherence to the specified oil type and interval critical.
Analysis derived from Volvo technical bulletins (2008-2012) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-6304-T3.
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