BMW S65 4.0L V8 Engine

Experience the legendary performance of the BMW S65 with this professionally remanufactured 4.0L V8 engine, engineered to exceed OEM specifications. Designed for enthusiasts and professional installers alike, this rebuilt S65 long block undergoes a complete teardown, rigorous inspection, and a meticulous reassembly using premium-grade components.

Every critical engine component—from rod bearings to head gaskets—is replaced or remanufactured to factory specs, ensuring peak reliability, performance, and longevity. Whether you’re restoring your BMW E90/E92/E93 M3 or completing a performance swap, this S65 rebuild brings factory-grade power back to your project.

Core required: All engine sales require a core engine return (core value not included in listed price). Please refer to warranty guidelines for acceptance parameters.

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Product Specifications:

• Engine Code: S65B40

• Displacement: 4.0L / 3999cc

• Configuration: Naturally Aspirated V8

• Valvetrain: DOHC, 32-Valve with VANOS

• Fitment: 2008–2013 BMW M3 (E90/E92/E93)

• Engine Block: Aluminum Alloy

• Crankshaft: Micro-polished remanufactured OEM crank

• Head: Full valve job with new valve seals

• Cylinder Block: Honed

• Bearings: New rod & main bearings

• Pistons: OEM inspected, rings replaced

• Gaskets: All-new, including head gasket, valve cover, and oil pan

• Timing Components: New timing chain, guide, and tensioner

• Oil System: Rebuilt and tested oil pump

• Warranty: 1 Year / 12,000 Mile Internal Components Warranty

• Core Return: Required (core engine must meet acceptance criteria)

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Subcategories (Under BMW Engines):

1. Remanufactured BMW Engines

2. S65 Engines (BMW M3 E90/E92/E93)

3. BMW V8 Engines

4. Performance Long Block Assemblies

5. BMW Crate Engines

6. Engine Rebuilds & Swaps

7. BMW E-Series M Engines

8. Core Return Required Engine Sales

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Why Choose a Remanufactured S65?

The S65 4.0L V8 is a motorsport-derived marvel found in the iconic E9X M3 series. With its high-revving power band and unique throttle response, it’s a favorite among enthusiasts. But due to its complexity, not every rebuild delivers true OEM performance. This remanufactured S65 engine includes premium internal replacements, expert machine work, and meticulous reassembly, restoring factory performance and peace of mind with a full internal warranty.