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You will receive a non-binding offer by 10 a.m on the next working day

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You will receive a non-binding offer by 10 a.m on the next working day

Get a Quote

Engine M52B25 256S3 BMW 5 Series E39 523i 170hp

Engine M52B25 256S3 BMW 5 Series E39 523i 170hp

Side view of an M52 B25 (256S3) engine on a wooden pallet against a white background. The silver engine with black covers is slightly angled.
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Buy M52 B25 256S3 engine

from

1.459,00 €

To the price overview
🟠 Rarely in stock ❓

⚠️ Note on availability:

Due to high demand and rapidly changing stock levels, we are unable to display real-time availability in our webshop. The availability indication therefore represents an estimate of the likelihood that a motor is currently in stock.

For binding information and a concrete offer, we kindly ask you to submit a request. You will receive an offer within a few hours.

incl. VAT, plus shipping costs

4–8 business days delivery time.

In Stock

Request now without obligation

Online orders in our online shop is currently not available: please fill out the “Availability Request Form” first. You will then receive a tailored offer in PDF format, after which you can place your order directly via email or phone.

Non-committal offer: This engine (M52 B25 256S3) is also available through other sales channels (both online and offline). Consequently, the possibility of a short-term intermediate sale cannot be ruled out. It is essential to check the engine’s availability and compatibility with your vehicle before proceeding.

WE ARE HERE TO HELP YOU!

Available M52 B25 256S3 engines

Discover our diverse range of engines – perfectly tailored to your individual needs. Whether you're looking for affordable replacement engines, complete engines, or professional engine overhauls: with us, you're guaranteed to find the right solution for your vehicle.


The listed prices vary depending on the mileage and current stock levels/capacities. You will receive a binding price with a customized offer upon request.

Our used M52 B25 256S3 engine without attachments includes the following scope of delivery:

  • Tested short block (engine block with oil pump, crankshaft, bearings, connecting rods, pistons)

  • Cylinder head including camshaft and valves

  • Oil pan & valve cover (used as transport protection, may need to be reused from the old part)

  • Testing procedures: Leak-down test, cylinder inspection with endoscope camera, inspection of oil pan and valve cover, visual check of crankshaft & camshafts, examination of residues in oil pump and oil pan

The timing chain/belt must be replaced before installation.
Request the availability of the engine now—free and without obligation:

Our complete used M52 B25 256S3 engine with attachments includes the following scope of delivery:

  • Tested engine (engine block + cylinder head)

  • Untested attachments such as starter, injectors, injection system, turbocharger, ignition coils, intake manifold, and much more

  • Oil pan & valve cover used as transport protection (may need to be reused from the old part)

  • Testing procedures: Leak-down test, cylinder inspection with endoscope camera, inspection of oil pan and valve cover, examination of residues in oil pump and oil pan

Attachments are included free of charge, but without any warranty.
The timing chain/belt must always be replaced before installation.
Request the availability of the engine now—free and without obligation:

Our overhauled M52 B25 256S3 engine without attachments has been fully reconditioned to 0 km and includes:

  • Fully overhauled engine block with cylinder head

  • New parts: valves, valve stem seals, piston rings, main/connecting rod bearings, oil pump, internal timing chain/belt

  • Processing & testing procedures: camshaft and crankshaft are measured, polished, crack-tested, and ultrasonically cleaned; cylinder head is measured, resurfaced, and ultrasonically cleaned; block is honed, ground, and measured; pistons are inspected, cleaned, and undergo UV crack testing

A durable engine in like-new condition – ideal for the highest demands.
Request the availability of the engine now—free and without obligation.

With our customer engine overhaul service, we recondition your defective M52 B25 256S3 engine:

  • Collection of your engine (without attachments)

  • Professional overhaul to 0 km with high-quality new parts (e.g., Kolbenschmidt, FEBI, FAI)

  • New parts: valves, piston rings, oil pump, bearings, internal timing chain/belt

  • Processing & testing procedures: camshaft and crankshaft are measured, polished, crack-tested, and ultrasonically cleaned; cylinder head is measured, resurfaced, and ultrasonically cleaned; block is honed, ground, and measured; pistons are inspected, cleaned, and undergo UV crack testing

After approximately 10–12 business days, you will receive your reconditioned engine back.
Request the availability of the overhaul service now—free and without obligation.

Check compatibility and availability of engine M52 B25 256S3

Kindly complete the “request for quote” form. We will confirm whether the engine M52 B25 256S3 matches your vehicle and provide you with detailed proposals for all the available options, whether you’re looking for a used engine, a reconditioned one, or prefer it bare or complete. Following this, you may proceed to place your order directly.
Request for Quote

" I'll assess the availability and verify the compatibility of the engine M52 B25 256S3 using your vehicle's VIN before sending a detailed quote to your email.

Each engine is subject to another rigorous quality check prior to dispatch to ensure only those in prime condition are shipped from our warehouse.

Our exclusive partnership with the DB-Schenker delivery service enables us to offer engines at unbeatable prices and ensure the quickest possible delivery times. "

Stefan
StefanCustomer Consultant

" I'll assess the availability and verify the compatibility of the engine M52 B25 256S3 using your vehicle's VIN before sending a detailed quote to your email.

Each engine is subject to another rigorous quality check prior to dispatch to ensure only those in prime condition are shipped from our warehouse.

Our exclusive partnership with the DB-Schenker delivery service enables us to offer engines at unbeatable prices and ensure the quickest possible delivery times. "

Stefan
Stefancustomer consultant

Engine description:

  • Engine code: M52 B25 256S3, M52B25 256S3
  • Engine condition: Rebuilt, Remanufactured or Used engine
  • Contents of delivery Bare engine (without attached parts) or a complete engine (depending on your choice)
  • Mileage: 0km (overhauled) or up to max 130,000km (details in the PDF offer)

Your benefits:

  • Security: 12 months warranty
  • Reliability: Engine specialist and wholesaler since 1993
  • Superior Quality: All engines are rigorously tested

Compatible vehicles with engine M52 B25 256S3:

  • Makes: BMW
  • Models: 5 Series E39
  • Motorization: 523i 170hp 125kW
Detailed list of compatible vehicles

M52 B25 256S3 Engine Technical Specifications & Compatibility.

Additional information

Engine Code

M52 B25 256S3, M52B25 256S3
Make

BMW
Model

5 E39
Motorization

523i
Power (hp)

170hp
Power (kW)

125kW
Fuel

Petrol
Number of Cylinders

6
Engine Capacity (ccm)

2494
Compression

10.2
Bore (mm)

84
Stroke (mm)

75
Number of Bearings

7
Number of Valves

24
Engine Charging

Naturally Aspirated Engine
Combustion

Petrol Engine
Fuel Mixture

Intake Manifold Injection/ Carburettor
Engine Type

Straight
Cylinder Type

DOHC
Engine Management

Chain
Price Used Engine (€)

1459

About Us

  • Our firm, with its headquarters in Mittenwalde, Germany, has been a prominent distributor of used and reconditioned engines since 1993
  • As of June 2022, we've sold over 36,000 engines and transmissions, making us one of the world’s leading engine suppliers.
  • A significant portion of our sales are to intermediaries and automotive workshops, a testament to our competitive prices and dependable service.

Robust and durable M52 B25 256S3 engine for BMW

  • Our used engines come from second-hand/accident-damaged vehicles (insurance). These are not repaired or makeshift engines.
  • That's why our engines are notably long-lasting and sturdy.

Thoroughly tested BMW M52 B25 256S3 engine

  • The M52 B25 256S3, M52B25 256S3 engine undergoes a thorough inspection before sale:
  • Compression test (leakdown)
  • Endoscopic inspection, oil pan, cylinders,
  • Valve cover, crankshaft, camshaft, oil pump, etc., are all checked.
  • Detailed control procedures are available in the PDF offer.

Our service for the M52 B25 256S3 engine

  • Depending on availability, we offer various M52 B25 256S3, M52B25 256S3 engines for your BMW:
  • A tested used bare engine without ancillary parts
  • A reconditioned engine reset to 0km
  • A complete engine with ancillary parts
  • Customer's engine reconditioning
  • Engine installation/mounting (This is no longer offered due to capacity reasons)

Awards and Reviews for Fair-Motors

Award for being the most popular engine dealer in Germany
"FAIR-MOTORS is the MOST POPULAR engine dealer on the biggest comparison platform for engines and engine repair (MotorschadenVergleich.de)."
Rated 4.68 out of 5
Excellent
4,68 out of 5,00 Stars
total 327 Reviews
89,76% positive
(Sep. 2022) 

Information about the BMW replacement engine M52 B25 256S3:

The M52 B25 256S3, M52B25 256S3 engine is used by the manufacturer BMW in the following models: 5 Series E39.

Engine type and performance:

Depending on the engine control unit, the Petrol engine M52 B25 256S3 has an output of 170hp, which is equivalent to 125kW.

The 6-cylinder Naturally Aspirated Engine engine is Water-cooled and produces a torque of Nm with a displacement of 2494ccm.

The 523i M52 B25 256S3 engine features 24 valves, 7 bearings, and achieves a compression ratio of 10.2 with a stroke of 75 mm and a bore of 84 mm.

It is a DOHC Petrol Engine Straight engine with Intake Manifold Injection/ Carburettor, powered by a Chain.

Detailed list of compatible vehicles for the engine M52 B25 256S3:

Make Model Motorization
BMW3 Touring (E46) [from 1999/06 to 2005/07]323 i [170 hp, 125 kW, 2494 cc, from 1999/10 to 2000/12]
BMW5 (E39) [from 1995/09 to 2003/07]523 i [170 hp, 125 kW, 2494 cc, from 1995/09 to 2000/08]
BMW5 Touring (E39) [from 1996/09 to 2004/06]523 i [170 hp, 125 kW, 2494 cc, from 1997/03 to 2000/08]

FAQ:

The quickest way is to fill out the “request for quote” form. Please provide the engine code M52 B25 256S3 and your VIN number so we can accurately identify the engine that is compatible with your vehicle. You will swiftly receive a detailed offer in PDF format via email. If everything matches, you can then proceed with the order.

It depends on the inventory. We sell M52 B25 256S3 engines either complete or bare. The complete engines come with spare parts included.

The engine is compatible with the following make and models:
BMW | 5 Series E39

To be certain, you should provide us with your VIN number so we can verify the engine’s compatibility.

The contents of the delivery vary depending on the engine. For the complete engine, we deliver the engine block with the cylinder head, valve cover, oil pan, and the injection system, turbocharger, alternator, manifold, wiring harness, etc. For the bare engine without ancillary parts, we deliver the engine block with the cylinder head, valve cap, and oil pan.

  • The contents of the delivery may vary. Please check the exact contents of the delivery in the PDF offer.

The mileage depends on the condition of the engine. The overhauled engine has been reset to 0km. The mileage of the used engine can vary. Make a brief inquiry on our website, and you will receive a detailed offer with precise mileage information.

The following parts are replaced with NEW ones:

  • Valves
  • Valve stem seals
  • Piston rings
  • Connecting rod bearings and main bearings
  • Oil pump
  • Timing chain with tensioner

Additional revision steps:

  • The camshaft and crankshaft are measured, polished, checked for cracks, and ultrasonically cleaned.
  • The cylinder head is measured, leveled, and ultrasonically cleaned.
  • The block is planed, sanded, and measured.
  • Pistons are inspected, cleaned, and subjected to UV crack testing.
  • Leakdown tests

✅ We can, of course, also overhaul your faulty engine.

FULL SERVICE:

We handle everything in-house, from engine overhauling to marketing and web design. This cuts down on many costs.

EFFICIENT USE OF OUR MACHINES:

Our processes are finely tuned, ensuring no downtime. Our machines and staff are fully utilized.

OPTIMIZED TASK DISTRIBUTION:

Each person works solely within their area of expertise. For instance, we have different specialists for various makes/types of engines. This saves a significant amount of time and enhances quality.

Yes, sometimes. The deposit varies depending on the engine.

The price of the engine varies depending on the engine’s condition:

Used engine: 1459 €

Complete engine: €

Overhauled engine: €

Engine Overhaul: €

Please note: Prices and availability are provided for guidance only!

Make an inquiry on the website to receive a detailed and final offer.