BMW 325i (2.5L), exc. Xi; M56 (256S6 engine, SLEV, engine oil filler cap RH side of rocker cover) 2.5L Engine (2002-2006)
VIN-VERIFIED UNIT
✓ Actual photos of the exact unit you'll receive — not a stock image
✓ Confirmed Fitment — fits these vehicles
  • 325i 2.5L Exc. Xi; M56 256S6 Engine Slev Engine Oil Filler Cap Rh Side Of Rocker Cover 2005, 2003, 2002, 2004
  • 325i Cpe 2.5L M56 256S6 Engine Slev Engine Oil Filler Cap Rh Side Of Rocker Cover 2006
  • 325i Conv 2.5L M56 256S6 Engine Slev Engine Oil Filler Cap Rh Side Of Rocker Cover 2006
Enter your VIN below and we’ll confirm the exact fit before we ship.
Engine · Tested

BMW 325i (2.5L), exc. Xi; M56 (256S6 engine, SLEV, engine oil filler cap RH side of rocker cover) 2.5L Engine (2002-2006)

4.5 on Trustpilot · 335 reviews
Confirm it fits YOUR vehicleEnter your VIN — we verify exact fit before you pay
Find your VIN on the driver-side door jamb or lower windshield.
Unit Condition & Specs
AvailabilityIn stock — ready to ship
55% OFF $3,916.00
$1,780.00
Mileage
Learn more →
✓ Flat-rate freight — insured & tracked ·✓ 90-day warranty included· freight shown at checkout: $250 commercial / $400 residential
Ships within 3 - 5 business days Approx - flat-rate freight, tracked & insured Most orders arrive 5–7 business days after dispatch (US). You get tracking the moment it ships.
Not sure it fits? Call an expert
🛡90-Day WarrantyParts replacement
🚚Flat-Rate FreightDelivered to your door
🔒Secure CheckoutEncrypted payment
↩24-Hr Free CancelFull refund within 24h

How ordering works

  1. 1Enter or confirm your VIN
  2. 2We verify exact fitment for your vehicle
  3. 3Flat freight shown up front — no surprises
  4. 490-day warranty included on every part
  5. 5We photograph & confirm the unit before it ships
What you're getting

What's included with this engine

You're buying a complete engine assembly — not a bare block. Here's exactly what arrives bolted to it, and the handful of accessories your mechanic moves over from your current engine during the install.

✓

Included with your engine

Already assembled — ships as one unit
  • Long block — fully assembled
  • Short block
  • Cylinder head
  • Crankshaft
  • Camshaft
  • Pistons
  • Intake manifold
  • Exhaust manifold
  • Oil pan
  • Timing cover
⇄

Not included — transfer these over

Reused from your current engine
  • Wiring harness
  • Bolt-on accessories
Why these aren't included: these parts are tied to your vehicle's exact trim and options, and the ones already on your current engine are almost always in good working order. Your mechanic transfers them across during the install — that's standard practice on an engine replacement, and it keeps your price down.
Quick definition: a short block is the block, crankshaft, camshaft and pistons. A long block adds the cylinder head and valvetrain. A complete engine — what you're buying here — is the long block with the intake manifold, exhaust manifold, oil pan and timing cover already fitted.
Not sure what your install needs? Talk to a parts expert
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Part details

About this part

Restore Your BMW 325i with a 2.5L M56 Engine (2002-2006)

Restore your 2002-2006 BMW 325i (excluding Xi models) using the 2.5L M56 engine (256S6). This SULEV-compliant powerplant, identified by its distinctive right-side oil filler cap on the rocker cover, delivers smooth performance, emissions compliance, and reliability - perfect for restoring your E46 to factory specifications or replacing a worn-out engine.

Engine Details:

Category Specifications
Displacement 2.5L
Fuel Type Gasoline (SULEV)
Configuration Inline-6
Power 184 HP @ 6000 RPM
Drivetrain Rear-Wheel Drive (RWD)
Torque 175 lb-ft @ 3500 RPM
Engine Code  M56B25
Identification Oil filler cap on RH side of valve cover


Compatibility:

  • BMW 325i (2002-2006) with 2.5L M56 engine (excludes Xi models)

  • SULEV emissions vehicles only

  • Visual ID: Oil filler cap on right side of valve cover

Why Choose This Engine?

SULEV Performance: Meets strict emissions standards while delivering smooth 184 HP power.

Proven Reliability: Reinforced components address common BMW inline-6 weaknesses.

Direct Fitment: Exact replacement for SULEV 325i models.

Cost-Effective: More affordable than N52 swaps with better emissions compliance.

Pricing Options:

We price based on mileage to fit your needs:

30,000 to 60,000 Miles

Price: $1,456.00

Best value for money for moderately used engines.

60,000 to 90,000 Miles

Price: $1,234.74

Ideal for budget-conscious customers who need a good engine with slightly used mileage.

90,000 to 120,000 Miles

Price: $1,014.00

A budget-friendly choice for consumers who value the functionality and price.

120,000 to 150,000 Miles

Price: $790.40

Budget-friendly choice for restoration projects or short-term use.

Key Features:

Emissions Compliant: Maintains California SULEV certification.

BMW Engineering: Classic inline-6 with Valvetronic and dual VANOS.

Tested & Certified: Each engine undergoes compression and leak-down tests.

Complete Package: Includes intake manifold and oil pan.

Shipping Information:

  • Weight: 340 lbs (boxed)

  • Dimensions: 34" L x 28" W x 30" H

Shipping Options:

  • Standard Shipping: Available for shipping within the continental U.S.

  • Expedited Shipping: The shipping can be expedited for an additional charge.

Frequently Asked Questions:

Q: Does the engine come with a warranty?

A: Yes, all our engines come with a 60 days warranty, covering any manufacturing defects or performance issues.

Q: How do I verify compatibility?

A: To verify your BMW with the SULEV-compliant M56 2.5L engine, begin by checking your Vehicle Identification Number (VIN). The 7th digit, which specifically identifies this ultra-low emissions variant. Next, confirm the "M56B25" engine code.

Q: What if the engine doesn't fit?

A: We provide a 60-day return policy in case the engine is not VIN-compatible. All we need you to do is call us, mail and we'll assist you in the return process.

Ready to Restore Your BMW 325i?

Choose the correct 2.5L M56 engine for your 2002-2006 BMW 325i with our mileage-based pricing.

Order with confidence

Tested, VIN-matched, and guaranteed

✓

VIN-Verified Fit

We match the part to your vehicle's VIN and confirm exact fitment before we ship — so it fits the first time. Free cancellation within 24 hours.

⚙

Works on Arrival, Guaranteed

Every unit is tested before it ships. If it arrives defective, we replace it fast — and in the rare case we can't replace it, you get a full refund.

★

90-Day Warranty

A real parts-replacement warranty, included — with extended coverage available.

✓Real photos of the exact unitWhat you see is what ships
✓A-grade OEM, testedVerified specs, not estimated
✓VIN-matched to your vehicleConfirmed before dispatch
Shipping & delivery

Heavy freight item, shipped fully insured and tracked. Freight is a flat $250 commercial / $400 residential, shown at checkout — no hidden fees, no freight-quote runaround.

1Ships within 3 - 5 business days ApproxCarefully packed & dispatched from our US warehouse
2Freight to your doorBrought to your door
3Delivered in 5–7 business daysTracked & insured · tracking sent when it ships
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