BMW N52 Engine: Everything About the N52B25A and N52B30A - Differences & Upgrades
Share
BMW N52 Engine: Everything About the N52B25A and N52B30A - Differences & Upgrades
The BMW N52 engine is one of the most reliable and beloved inline-six engines BMW has ever produced. This naturally aspirated engine was used between 2004 and 2015 in various BMW models, including the E90, E91, E92, and E93 3-Series. In this guide, we'll discuss the different variants, their differences, and available upgrades.
What is the BMW N52 Engine?
The N52 is a 3.0-liter inline-6 gasoline engine with a magnesium-aluminum block, Valvetronic variable valve timing, and Double-VANOS. This engine was known for its smooth operation, reliability, and efficiency. The N52 even won multiple "Engine of the Year" awards.
N52 Variants: N52B25A vs N52B30A
N52B25A (2.5L)
- Displacement: 2,497 cc
- Power: 160-218 hp (depending on tuning)
- Torque: 250 Nm
- Models: BMW 325i, 525i, X3 2.5si
- Features: Smaller bore (82mm), shorter stroke
N52B30A (3.0L)
- Displacement: 2,996 cc
- Power: 218-272 hp (depending on tuning)
- Torque: 300 Nm
- Models: BMW 330i, 530i, X5 3.0si, Z4 3.0si
- Features: Larger bore (85mm), longer stroke, more power and torque
Key Differences
| Specification | N52B25A | N52B30A |
|---|---|---|
| Displacement | 2.5L | 3.0L |
| Power | 160-218 hp | 218-272 hp |
| Torque | 250 Nm | 300 Nm |
| Bore x Stroke | 82 x 78.8mm | 85 x 88mm |
Popular N52 Upgrades for Your E9X
Want to get more out of your N52 engine? Here are some upgrades that fit perfectly with both the N52B25A and N52B30A:
Engine Bay Upgrades
- Aluminum Engine Bay Upgrade - Blue - Give your engine bay a premium look with high-quality aluminum components
- Aluminum Engine Bay Upgrade - Red - Sporty red accents for a race-inspired look
Essential Maintenance & Performance Parts
- Bevinsee Magnetic Oil Filter Housing Cap - Specifically designed for N52 engines, captures metal particles for better engine longevity
- Bevinsee Coolant Reservoir Cap - High-quality aluminum replacement for the plastic OEM cap
- Bevinsee Washer Fluid Reservoir Cap - Durable aluminum upgrade for your E9X
Protection & Functionality
- Cabin Air Cowl Filters & Weather Guards - Protect your engine bay from leaves and debris
- Engine Harness Mounting Bracket - Prevent cable damage with this essential bracket
Why Upgrade Your N52?
The N52 engine is naturally reliable, but with the right upgrades you can:
- Extend engine lifespan with high-quality components
- Improve the aesthetics of your engine bay
- Provide better protection against wear
- Optimize maintenance intervals
Conclusion
Whether you have an N52B25A or N52B30A, both engines provide an excellent foundation for a reliable and enjoyable driving experience. With proper upgrades and maintenance, this engine can easily last hundreds of thousands of kilometers.
Shop all N52-compatible upgrades in our E9X Performance Parts catalog.