The BMW N73 B60 B is a 5,972 cc, V12 naturally aspirated petrol engine produced between 2003 and 2010. It featured dual overhead camshafts (DOHC), 48 — valve configuration, and BMW's Valvetronic II system with double VANOS variable valve timing. In standard tune, it delivered 368 kW (500 PS) and 600 Nm of torque, offering smooth throttle response and refinement for luxury applications.
Fitted to models including the E65 7 Series and E63 6 Series, the N73 B60 B was engineered f…
Production years 2003–2010 meet Euro 4 emissions standards .
The BMW N73 B60 B is a 5,972 cc V12 naturally aspirated petrol engine engineered for luxury and performance platforms (2003–2010). It combines Valvetronic II with double VANOS to deliver precise throttle control and smooth power delivery. Designed to meet Euro 4 standards, it balances performance with responsiveness in BMW's high-end petrol strategy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,972 cc | |
Fuel type | Petrol | |
Configuration | V12, DOHC, 48-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 368 kW (500 PS) @ 6,100 rpm | |
Torque | 600 Nm @ 3,500 rpm | |
Fuel system | Sequential multipoint fuel injection (SME) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (DOHC) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 245 kg |
The BMW N73 B60 B was used across BMW's E65/E63 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-increased cooling capacity in the E65 7 Series and revised intake manifolds in the E63 6 Series-and from 2007 the updated high-pressure fuel pump with improved internal components, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The N73 B60 B is mechanically robust with good longevity when properly maintained. Early models (2003-2007) are prone to high-pressure fuel pump failure, but post-2007 revisions resolved this with improved internals. Regular oil changes (every 12,000 km), use of correct BMW Longlife-01 oil, and attention to fuel quality ensure long-term reliability. The strong V12 architecture supports high mileage with minimal wear when serviced correctly.
Primary issues include HPFP failure (especially pre-2007), Valvetronic motor faults, VANOS solenoid failures, and coolant leaks from the expansion tank. These are well-documented in BMW service bulletins and stem from component aging, thermal stress, and maintenance neglect. The 2007 fuel pump update significantly improved system durability.
The N73 B60 B was used in the E65 7 Series (760i, 760Li) and E63 6 Series (650i). It was part of BMW's naturally aspirated V12 strategy, offering balanced performance in luxury and grand tourer models. No licensed applications outside BMW. The engine was succeeded by the N74 engine family.
Yes. The N73 B60 B responds well to ECU remapping, with safe gains of +50-100 PS achievable on stock hardware. Aftermarket upgrades like performance intakes and exhausts allow modest increases. The robust V12 bottom end supports moderate tuning without internal modifications. Enthusiasts often pair ECU tuning with intake and exhaust modifications for improved throttle response.
In combined driving, expect 14.0–18.0 L/100km (20–16 mpg UK). Highway cruising can achieve ~12.0 L/100km (~23 mpg UK), while city driving may exceed 20.0 L/100km (14 mpg UK). Real-world figures depend on driving style and vehicle weight, with E65 models generally less efficient than E63. The engine's smoothness contributes to relaxed motorway efficiency.
Yes. The N73 B60 B is an interference engine. If the timing chain fails or skips, pistons will contact open valves, causing catastrophic internal damage. While the double-row roller chain is durable, any signs of rattle or tensioner wear should be investigated immediately to prevent engine seizure. Regular oil changes help maintain chain tensioner function and lubrication.
BMW specifies SAE 5W-30 oil meeting BMW Longlife-01 standard. Use a high-quality synthetic designed for petrol engines. Change oil every 12,000 km or annually to protect the HPFP, Valvetronic system, and timing chain. Proper lubrication is essential for long-term reliability, especially under sustained load or high-temperature operation.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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