The BMW N52B30A is a 2,996 cc, naturally aspirated inline — six petrol engine produced between 2005 and 2011. It features double overhead camshafts (DOHC), Valvetronic III variable valve lift, and electronic throttle control, delivering smooth power delivery and high — revving performance. In standard tune it produced 170 kW (231 PS) with 270 Nm of torque, emphasizing linear throttle response and refined driving dynamics.
Fitted to models such as the E60 530i, E90 330i,…
All production years (2005–2011) meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/8891).
The BMW N52B30A is a 2,996 cc inline-six petrol engine engineered for mid-size and luxury models (2005–2011). It combines Valvetronic III variable valve lift with DOHC architecture to deliver refined throttle response and high-RPM power. Designed to meet Euro 4 emissions standards, it balances driving engagement with everyday usability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Petrol | |
Configuration | Inline-6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 170 kW (231 PS) @ 6,000 rpm | |
Torque | 270 Nm @ 2,750–3,000 rpm | |
Fuel system | Sequential multi-point injection with Valvetronic III | |
Emissions standard | Euro 4 | |
Compression ratio | 10.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Dual-row roller chain (non-interference design) | |
Oil type | BMW Longlife-01 (SAE 5W-30) | |
Dry weight | 173 kg |
The BMW N52B30A was used across BMW's E6x/E9x platforms with longitudinal mounting. This engine received platform-specific adaptations-shortened intake manifolds in the E70 and revised cooling routing in the E60-and from 2007 the facelifted E90 LCI models adopted updated Valvetronic calibration, creating minor software differences. All adaptations are documented in OEM technical bulletins.
The N52B30A's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in urban driving with frequent short trips. Internal BMW quality reports from 2009 indicated a significant share of pre-2008 engines required pump replacement before 100,000 km, while UK DVSA records show fuel system faults contributing to emissions-related MOT failures. Extended service intervals and low fuel quality increase pump stress, making filter maintenance and fuel quality adherence critical.
Analysis derived from BMW technical bulletins (2005–2012) and UK DVSA failure statistics (2010–2020). Repair procedures should follow manufacturer guidelines.
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The N52B30A offers solid performance and smooth operation, but early models (2005–2007) had reliability concerns, particularly high-pressure fuel pump and Valvetronic actuator failures. Later revisions (post-2008) improved component durability, so well-maintained examples can exceed 150,000 km. Regular servicing with BMW-specified oil (5W-30 Longlife-01) and timely fuel system maintenance greatly enhance longevity.
The most frequent issues are high-pressure fuel pump wear, Valvetronic actuator failure, and coolant leaks from the thermostat housing. These are well-documented in BMW service bulletins. Fuel pump issues are linked to fuel quality, while Valvetronic problems stem from material aging under heat. Coolant leaks are design-related and affect pre-2008 units most.
This 3.0L petrol engine was used in several BMW models during the mid-2000s. It powered the E90 3 Series (330i), E60 5 Series (530i), E70 X5 (xDrive30i), and E85 Z4 (sDrive30i). It was phased out in favor of the turbocharged N53 engine around 2011. All applications met Euro 4 emissions standards.
Limited tuning potential exists due to its naturally aspirated design. ECU remaps typically yield +10–15 kW by optimizing throttle response and fuel mapping, but gains are modest. Supporting modifications like intake/exhaust upgrades offer minimal returns. The Valvetronic system limits aggressive tuning, and stock internals are not built for high boost. Most owners prioritize reliability over performance modifications.
Moderate. In a 330i (E90) from 2008, combined consumption is ~9.2 L/100km (30.5 mpg UK). City driving may see 11–13 L/100km, while highway runs can achieve ~7.0 L/100km. Real-world figures depend heavily on driving style, as the engine rewards smooth inputs. Expect 28–33 mpg (UK) on mixed routes for a well-maintained N52B30A.
No. The N52B30A uses a non-interference timing chain design. This means if the chain skips or breaks, the pistons will not contact the valves, preventing catastrophic internal damage. However, any timing fault still requires immediate attention to avoid engine stalling and secondary issues. The dual-row roller chain is durable but should be inspected periodically.
BMW specifies SAE 5W-30 synthetic oil meeting BMW Longlife-01 standard. This formulation protects the Valvetronic system and high-pressure fuel pump. Change intervals should not exceed 15,000 km or 24 months. Using incorrect oil can accelerate cam follower wear and reduce Valvetronic actuator lifespan. Always use high-quality petrol to support engine longevity.
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Regulation (EC) No 715/2007
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