The N52B25 is a naturally aspirated inline-six gasoline engine from BMW’s N52 series (2.5L version), produced from 2005 to 2011 (with some applications continuing until around 2013) and manufactured at the Munich plant. It is the successor to the M54 and incorporates advanced technologies such as a magnesium-aluminum alloy cylinder block, Valvetronic variable valve lift, and Double-VANOS variable valve timing; it is renowned for its lightweight design, high efficiency, and smooth operation.
Our products are exported to various parts of the country, and the customers we have worked with have received unanimous praise. The company has invested over 20 million yuan in high-end remanufacturing equipment imported from abroad and a first-class production team in the country. Our warehouse has a total area of over 8000 square meters, with scientific management and sufficient supply of goods.
| Item | Specification |
|---|---|
| Manufacturer | BMW |
| Engine Family | N52 |
| Engine Code | N52B25 |
| Engine Type | Naturally Aspirated Gasoline Engine |
| Displacement | 2,497 cc / 2.5L |
| Cylinder Configuration | Inline 6-Cylinder |
| Bore × Stroke | 82.0 × 78.8 mm |
| Compression Ratio | Approx. 11.0:1, version dependent |
| Valve Configuration | DOHC, 24 Valves |
| Fuel System | Multi-Point Fuel Injection |
| Aspiration | Naturally Aspirated |
| Valve Timing | Double VANOS |
| Valve Lift Control | Valvetronic |
| Timing System | Timing Chain |
| Common Power Range | Approx. 130–160 kW |
| Common Torque | Approx. 230–250 Nm |
| Fuel Type | Gasoline |
| Crankcase Construction | Magnesium-Aluminum Composite |
| Cylinder Head | Aluminum Alloy |
| Engine Installation | Longitudinal |
| Assembly Type | Engine Long Block |
Specifications may vary according to engine suffix, production year, vehicle application and market specification.
Please confirm the exact engine version before purchase.
The BMW N52B25 engine has been used in selected BMW models, including the following applications.
| BMW Model | Chassis Code | Engine Application |
|---|---|---|
| BMW 323i | E90 | Selected market versions |
| BMW 323i | E91 | Selected market versions |
| BMW 523i | E60 | Selected versions |
| BMW 523i Touring | E61 | Selected versions |
| BMW 523i | F10 | Selected 2010–2011 versions |
| BMW 523i Touring | F11 | Selected market versions |
| BMW 525i | E60 | Selected versions |
| BMW 525i Touring | E61 | Selected versions |
| BMW 325i | E90 | Selected versions |
| BMW 325i Touring | E91 | Selected versions |
| BMW 325i Coupe | E92 | Selected versions |
| BMW 325i Convertible | E93 | Selected versions |
| BMW X3 2.5si | E83 | Selected versions |
| BMW X3 xDrive25i | E83 | Selected versions |
| BMW Z4 2.5i | E85 | Selected versions |
| BMW Z4 2.5si | E85 | Selected versions |
| BMW Z4 sDrive23i | E89 | Selected versions |
Important Fitment Notice
BMW N52 engines are available in different displacement and output configurations.
The N52B25 should not be considered interchangeable with the N52B30 simply because both belong to the N52 engine family.
Differences may include crankshaft specifications, piston dimensions, internal components,
engine management, oil pan configuration and external accessories.
Some BMW models may also use N51, N53 or other engine variants depending on market and production date.
Please provide the following information before ordering:
17-digit vehicle VIN
Original engine code
Vehicle model and production year
Original engine OE number
Photos of the original engine nameplate, if available
The following BMW part numbers are related to N52B25 short engine applications.
| BMW Part Number | Engine Version | Catalog Description |
|---|---|---|
| 11000415402 | N52B25A | Short Engine |
| 11000415403 | N52B25A | Short Engine Reference |
| 11000415408 | N52B25B | Short Engine, Low-Compression Application |
| 11000415409 | N52B25B | Exchange Short Engine |
| 11000417638 | N52B25BF | Short Engine |
| 11000417639 | N52B25BF | Short Engine |
OE Number Disclaimer
These part numbers are BMW catalog references for specific short engine and exchange short engine applications.
They should not be interpreted as universal long block OE numbers.
The correct replacement engine configuration must be verified using the vehicle VIN, original engine code and production date.
Please contact us for OE cross-reference assistance before placing an order.
The BMW N52B25 2.5L inline-six engine long block is suitable for professional automotive engine replacement and repair markets.
We welcome inquiries from:
Automotive engine importers
Engine wholesalers and distributors
Auto parts dealers
Independent repair workshops
Engine rebuilding companies
Automotive service centers
For wholesale inquiries, please provide your required engine version, order quantity and destination country.
The BMW N52B25 has a displacement of approximately 2,497 cc, or 2.5 liters.
No. The N52B25 is a naturally aspirated gasoline engine.
The N52B25 uses an inline six-cylinder configuration with 24 valves.
Yes. The N52 engine features BMW Valvetronic variable valve lift technology and Double VANOS variable valve timing.
The N52 uses a magnesium-aluminum composite crankcase with an aluminum-silicon inner structure.
Its cylinder bores use an Alusil-based structure rather than conventional removable cast-iron cylinder liners.
No. They have different displacements and internal specifications.
Compatibility must be checked against the original engine code and vehicle VIN.
Not automatically. External accessories and the exact supply scope must be confirmed according to the actual product configuration.
Yes. Please provide the 17-digit VIN, original engine code and OE reference number for compatibility verification.
Yes. We welcome inquiries from international engine distributors, automotive parts wholesalers,
importers and professional repair businesses.
Looking for a BMW N52B25 2.5L gasoline engine long block for replacement or wholesale distribution?
Contact us with your vehicle VIN, original engine code and OE reference number.
Our team can assist with engine identification, fitment verification, product configuration and export quotations.
Send us your inquiry today for BMW N52B25 engine long block supply.
| Place of Origin | Guangdong, China |
| Condition | New |
| Purpose | for replace/repair |
| Type | Gas / Petrol Engine |
| Power | OEM Standards |
| Quantity (pieces) | 1 - 10 | 11 - 50 | > 50 |
| Lead time (days) | 7 | 15 | To be negotiated |
1. Our remanufactured products use accessories provided by well-known brand suppliers such as VICTORREINZ, SCHAEFFLER, KS KOLBENSCHMIDT GmbH, etc.
2. Our product quality is close to the original factory quality, but the price is only 50-60% of the original engine. We can also provide you with a one-year or 100000 kilometer warranty service for the entire machine, and professional after-sales personnel will follow up with you.
3. We have over 15 years of experience in the production and research of automotive engines, and our technical level and personnel training are very scientific and mature. Customers who have worked with us have expressed their agreement with our products and after-sales service.
4. 2018 It has achieved an annual production capacity of 2200 units and has become a major supplier of high-end engine remanufacturing and parts in China's automotive aftermarket.
5. In April 2021, T/CAAMTB passed the certification company of China Automobile Research and Huacheng. 19-2019 Certification of the management system requirements of gas vehicle parts remanufacturing enterprisesIn October 2021, he became a member of the National Green Manufacturing Technology Standardization Committee and participated in the drafting of the Technical Specification for Assembly of Remanufacturing Mechanical and Electrical Products.
