Which BMW Has the S68 Engine? BMW’s New V8 Explained Simply

 

Photo by Moaaz Baig on Unsplash

If you’ve been looking at newer BMW “M60i” models (or the XM) and you’ve seen people mention the BMW S68 engine… BMW doesn’t exactly shout “S68B44A” on the boot lid. They market the cars as X5 M60i, X7 M60i, XM, and so on. But under the bonnet, the story is pretty simple: The S68 is BMW’s newest 4.4-litre twin-turbo V8 — built for modern performance SUVs and designed to work with electrification.

That last part matters, because this V8 isn’t just about noise and speed. BMW built it to feel fast and smooth in real life: pulling hard from low revs, feeling less “laggy”, and behaving better in traffic than older V8 setups. S68 is a part of BMW’s newer engine generation, which ties it to the latest high-performance models.

Quick answer: Which BMW models have the S68 engine?

Here’s the list, actually, same here for:

BMW model	Variant(s)	What it’s like
BMW X5	X5 M60i xDrive	The “daily-drivable” V8 SUV that still feels savage when you lean on it
BMW X6	X6 M60i xDrive	Same idea as the X5 M60i, just coupe-SUV style
BMW X7	X7 M60i xDrive	Big luxury barge… that moves like it absolutely shouldn’t
BMW XM	XM / XM Label Red	The wild one: V8 + plug-in hybrid power

What is the S68 engine, really?

Think of the S68 as BMW saying: “We still want a V8… but it needs to work in the world we live in now.”

So it’s a 4.4-litre twin-turbo V8, but with a modern twist:

• In the M60i cars, it’s usually paired with 48V mild-hybrid tech (helps smoothness, response, and efficiency).
  
  

• In the XM, it’s part of a plug-in hybrid system (electric motor + battery adds torque and helps it feel instant).

This is why people describe it differently from older BMW V8S. It’s still fast, but it’s also built to feel cleaner and sharper day-to-day. 

Why BMW fans care: what makes it feel different?

If you’ve driven older turbo cars, you know that “wait… wait… NOW it goes” feeling. The S68 is built to avoid that. In normal driving, what owners tend to notice is:

• big torque early (it pulls hard without needing to be revved)
  
  

• smoother power delivery
  
  

• less obvious turbo lag
  
  

• and in hybrid versions, that electric help can make it feel like it’s always “ready”

It’s the kind of engine that doesn’t need drama to feel quick. You just squeeze the throttle, and it goes.

S68 vs older BMW V8s: is it “just an S63”?

No — and it’s worth saying clearly, because people mix these up.

BMW’s older high-performance V8 discussions often revolve around engines like the S63 engine (used in full-fat M cars like X5M/X6M in previous generations). The S68 is the newer chapter, aimed at the latest M Performance flagships and the XM hybrid setup. BMW engine discussions consistently frame the S68 as a newer-generation engine rather than a simple carry-over.

Reliability: what should you actually worry about?

Here’s the honest bit: the S68 is still relatively new, so nobody can truthfully say, “every S68 will run 200k miles with no issues”, it hasn’t been around long enough for that kind of long-term pattern and information. But you can be smart about it, because modern twin-turbo V8 ownership tends to follow the same basic rules.

1) Heat and cooling matter (a lot)

Turbo V8s run hot. That’s normal.  What isn’t normal is ignoring coolant loss, small leaks, or overheating warnings. If you stay on top of cooling system health, you avoid a lot of pain.

2) Oil changes aren’t a “nice-to-have”

On a performance V8, oil isn’t just oil — it’s survival juice. The people who get the best reliability usually do the boring things consistently:

• correct oil specifications all the time
  
  

• sensible change intervals
  
  

• don’t run it low
  
  

• don’t ignore warning lights

3) XM owners: remember it’s not just an engine

If you’re looking at an XM, you’re buying a powertrain that includes hybrid BMW engine parts. BMW’s XM references describe it as a combined hybrid setup, so reliability isn’t only about the V8, it’s about the whole system working properly.

How to confirm your BMW has the S68 (without guessing)

Don’t trust a random forum comment that says “all 4.4 V8s are the same”.

Do this instead:

1. Check your exact model/trim (X5 M60i, X7 M60i, XM, etc.)
   
   

2. Use a VIN decoder/build sheet to confirm the engine and specification
   
   

3. When sourcing BMW engine spares, confirm by part number, not “it looks similar”

This matters more than ever because modern BMWs change small details based on options, especially around sensors and cooling layouts.

Are the used S68 engines available yet?

People are already searching for used BMW engines for these models, but the truth is:

• it’s newer,
  
  

• there are fewer donor vehicles,
  
  

• and a lot of parts are spec-specific.

So yes, you’ll see used engines and assemblies appear, but if anyone is buying one, the key is matching the correct version to the car’s spec (and that usually means VIN-based checks).

FAQ

Which BMW has the S68 engine?

Commonly: X5 M60i, X6 M60i, X7 M60i, and the BMW XM.

What does S68B44A mean?

It’s the engine code used in technical/enthusiast circles to identify the exact 4.4-litre V8 family.

Is the S68 engine reliable?

It’s still early for “long-term verdicts,” but the best way to keep it happy is boring but effective: stay on top of oil, cooling, and servicing, and don’t ignore small issues.

Is the S68 the same as the S63?

No. The S68 is the newer generation used in BMW’s latest M Performance flagships and the XM hybrid setups.

Disclaimer: this article is general information only. BMW specifications and engine availability can vary by model year and market. Always confirm your exact engine and fitment using your VIN/build data before ordering parts or planning repairs.