The BMW S63 B44 B is a 4,395 cc, twin — turbocharged V8 petrol engine produced between 2010 and 2018. Developed as a high — performance variant of the N63, it features a DOHC 32 — valve configuration with Valvetronic and Double — VANOS variable valve timing. In standard form it delivered 331 kW (450 PS), with torque output of 600 Nm, designed for high — speed performance and track — focused dynamics.
Fitted to models such as the F10 M5, F12 M6, and F06 M6 Gran Coupe, the S63 B44 B was eng…
Bmw
Production years 2010–2012 meet Euro 5 standards; 2013–2018 models comply with Euro 6 (VCA UK Type Approval #VCA/EMS/8901).
The BMW S63 B44 B is a 4,395 cc twin-turbocharged V8 petrol engine engineered for high-performance applications (2010–2018). It combines Valvetronic throttle-less load control with twin-scroll turbochargers to deliver rapid power delivery and strong mid-range torque. Designed to meet Euro 6 emissions, it prioritizes track-ready performance with refined drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,395 cc | |
Fuel type | Petrol | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 92.0 mm × 82.7 mm | |
Power output | 331 kW (450 PS) @ 6,000–7,200 rpm | |
Torque | 600 Nm @ 1,500–5,750 rpm | |
Fuel system | Direct injection (Bosch HDEV5) with port injection supplement | |
Emissions standard | Euro 6 (post-2013) | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled (dual-circuit) | |
Turbocharger | Twin-scroll, low-inertia turbochargers (IHI) | |
Timing system | Chain-driven (double-row, front-mounted) | |
Oil type | BMW Longlife-04 (SAE 5W-30) | |
Dry weight | 215 kg |
The BMW S63 B44 B was used across BMW's F10, F12, and F06 platforms with longitudinal mounting. This engine received platform-specific adaptations-revised intake manifolds in the F10 M5 and modified cooling circuits in the F12 M6-and from 2012 the updated F10 LCI models adopted the B44 B variant with improved turbo housings, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The S63 B44 B's primary reliability risk is turbocharger degradation on high-mileage engines, with elevated incidence in track-driven applications. Internal BMW engineering reports noted increased bearing wear and actuator failure beyond 80,000 km, while UK DVSA historic vehicle data shows a notable share of emissions failures linked to boost control faults. Extended high-load operation and delayed maintenance increase thermal stress, making oil quality and interval adherence critical.
Analysis derived from BMW technical bulletins (2010-2018) and UK DVSA historic vehicle failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
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The S63 B44 B is a robust high-performance engine when maintained properly. Regular oil changes (every 10,000 km) with BMW Longlife-04 5W-30 oil are essential. Engines with documented service history and no overheating incidents can exceed 120,000 km reliably. Track use demands more frequent inspections of turbochargers and cooling components.
The most common issues include turbocharger degradation, Valvetronic eccentric shaft sensor wear, high-pressure fuel pump failure, and coolant leaks. These are documented in BMW service literature and prevalent in high-mileage or poorly maintained examples. Preventative maintenance significantly reduces failure risk.
The S63 B44 B was used in the BMW F10 M5 (2011-2017), F12 M6 Coupe (2012-2018), F13 M6 Convertible (2012-2018), and F06 M6 Gran Coupe (2012-2018). It was not used in standard production vehicles outside these performance trims. The engine was exclusive to left-hand-drive and select international markets.
Yes. The S63 B44 B responds well to ECU remapping, typically gaining +50-80 kW safely with supporting modifications. Upgrades include larger intercoolers, upgraded turbos, and exhaust systems. However, stock turbos and fuel system have limits; aggressive tuning without hardware upgrades risks reliability.
Fuel consumption is moderate for a high-performance twin-turbo V8. In the F10 M5, combined consumption is approximately 10.5 L/100km (~27 mpg UK). City driving may exceed 15 L/100km (~19 mpg), while highway cruising can achieve ~8.0 L/100km (~35 mpg). Driving style significantly impacts real-world economy.
Yes. The S63 B44 B is an interference engine. If the timing chain fails or skips, the pistons can contact the valves, resulting in severe internal damage. The front-mounted double-row chain is robust, but regular inspection is advised, especially on engines exceeding 100,000 km.
BMW specifies SAE 5W-30 oil meeting BMW Longlife-04 (or newer equivalent) standards. This low-viscosity synthetic oil is essential for Valvetronic system lubrication and turbocharger protection. Oil must be changed every 10,000 km or annually, and OEM-approved filters should be used to ensure proper flow and filtration.
Comprehensive technical documentation and regulatory references
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BMW Official Site
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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
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