BMW M6 S63 Engine Review

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BMW M6 S63 Engine

The BMW M6 S63 engine is an absolute beast. It powers high-performance M models like the F06, F12, and F13 M6—perfect for anyone who craves serious speed without giving up that signature BMW luxury.

But let’s be real—what do you do when this powerhouse needs new parts or even a full replacement?

That’s where finding a trustworthy source for used BMW S63 engines (especially models from 2012 onward) becomes super important. In this guide, we’ll walk you through what makes the S63B44B engine so special, why it's earned its spot as one of BMW’s most respected motors, and how to shop smart when you're on the hunt for quality used parts.

What Is the S63 Engine?

BMW’s S63 is the high-performance beast—a 4.4-litre twin-turbo V8 engineered with the M models in consideration. It is the brainchild from the N63 engine, but is further enhanced with serious improvements to push it to the next level. We’re talking about goodies like twin-scroll turbochargers in the “hot-vee” setup, direct fuel injection, Valvetronic variable valve timing, and Double-VANOS camshaft control.

One special variant, the S63B44B, is utilized in the F10 M5 as well as in the F06/F12/F13 M6. As normally aspirated, it creates about 560 horsepower, or over 600 hp with the optional Competition Package. It is powerful, to be sure, but it is also designed to provide instantaneous response as well as seamless, uninterrupted torque all the way through the rev band. In short, it is fun to drive

What Makes the S63 Engine So Popular?

The appeal of the S63 engine goes beyond speed. Here are some enticing features;

  • Daily drivability: While it delivers track-worthy performance, it’s also smooth enough for everyday use.

  • Tuning potential: It responds very well to performance upgrades, such as ECU remapping and exhaust modifications.

  • Advanced cooling and lubrication: The cooling system is designed to handle prolonged high-speed driving.

For M6 owners or enthusiasts seeking a replacement S63B44B engine, it's crucial to obtain parts that are either original or marked as aftermarket, ensuring the engine maintains its performance and reliability.

Common Issues with the S63 Engine

Even though the BMW S63 engine is advanced, it's not immune to wear and tear. Some known issues include:

  • Valve stem seal leaks (especially in higher mileage engines)

  • Carbon build-up on intake valves due to direct injection

  • Oil consumption (which can increase over time)

  • Coolant hose failures from long-term heat exposure

If you’re dealing with any of these issues, the key is finding high-quality used parts from a trusted dismantler. Swapping out a faulty turbocharger, valve cover, or even full S63 engine for sale should be done with OEM or well-documented aftermarket parts.

Choosing the Right Used S63 Engine or Parts

Looking for a replacement S63B44B engine or parts like turbochargers, intercoolers, or ECUs? Here’s what you need to keep in mind:

  • Match the engine code: Make sure you’re getting the S63B44B, which fits M6 models (F06, F12, F13) from 2012 to 2019.

  • Check mileage and condition: Don’t hesitate to ask for the engine’s mileage history, compression test results, or any inspection reports to get a clear picture of what you’re buying.

  • Know the warranty and returns: A good warranty gives you peace of mind, so be sure to understand the terms before you buy.

  • Ask about delivery: Some parts are heavy or delicate, so check how long shipping will take and how they handle it.

Delivery, Warranty, and Customer Confidence

At MT Auto Parts, we offer genuine OEM S63 engines and parts carefully pulled from BMW models starting from 2012. Whether you need an oil pump or a complete engine, almost every part is tested and verified before it is added to our inventory. If something’s aftermarket, we’ll let you know upfront describing it on our website. Additionally, our parts come with a 30-day warranty (terms apply) and typically ship quickly, often within 48 hours. For smaller parts under 20kg, delivery is even faster, arriving in just 24 hours in the UK mainland.

If your part doesn’t fit or isn’t quite what you expected, our precise Delivery & Returns and Warranty policies make fixing it hassle-free. 

FAQs

1. How do I know if an S63 engine is compatible with my BMW M6?

Compatibility starts with the engine code—in this case, the S63B44B for M6 models from 2012 to 2019 (F06, F12, F13). Before purchasing, verify the exact production year and body style of your vehicle to ensure a correct match. At MT Auto Parts, we will confirm this for you and can also advise on whether an engine or part is suitable for your vehicle.

2. Is it better to replace the whole engine or fix individual parts?

It depends on the damage. If your current S63B44B motor has suffered significant internal damage (cracked block, seized crankshaft), a full-engine swap might be more cost-effective.

3. Are used BMW S63 engines reliable?

Yes—if sourced from a reputable BMW breakers. OEM engines pulled from low-mileage or well-maintained donor cars can run smoothly for years. At MT Auto Parts, for example, we thoroughly test all engines before listing and include a 30-day warranty, providing you with peace of mind.
Location: Edinburgh, UK

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