If you’re looking for a BMW S58B30 engine for sale, you already know this isn’t some generic four-cylinder swap. The S58 is the twin-turbo inline-six that powers the current M3, M4, X3 M, X4 M, X5 M, and X6 M, and it’s become one of the most sought-after engines in the used and performance market because it makes serious power right out of the box and takes tuning even further. We keep tested S58B30 engines in stock, we check every one before it leaves our shop, and we ship worldwide, so wherever your M car or build is sitting, we can get a verified engine to you without the guesswork that comes with buying blind off a forum classified or an overseas auction listing.
This page covers what the S58B30 actually is, the real specifications behind it, which cars it fits, what we check before calling one ready to ship, and how the buying and shipping process works. If you’ve been searching for a BMW S58B30 engine for sale and want straight facts instead of a sales pitch, keep reading.
What Is the BMW S58B30 Engine?
The S58 is BMW M’s turbocharged inline-six, built on the same basic architecture as the B58 found in lesser 3 Series and X3 models but reworked from the ground up for serious performance duty. The B30 in the name tells you the displacement class, roughly 3.0 liters, and the S prefix marks it as an M-division engine rather than a regular production unit. BMW introduced it in 2019 and it’s been the beating heart of the current generation M3, M4, and the X3 M, X4 M, X5 M, and X6 M ever since, plus a run in the BMW M2 and the limited-run 3.0 CSL.
What sets the S58 apart from a standard B58 isn’t just tuning. It gets a closed-deck aluminum block instead of the B58’s open-deck design, which lets it handle much higher cylinder pressures without the block flexing under load. It runs a forged steel crankshaft, forged connecting rods, and forged aluminum pistons with a proprietary anti-friction coating, and it uses two separate mono-scroll turbochargers instead of one larger unit, which sharpens throttle response and reduces turbo lag compared to a single big turbo setup. That combination is why the S58 has developed such a strong reputation among tuners and why a properly tested used unit still holds real value.
BMW S58B30 Engine Specifications
Here’s what you’re actually getting when you buy an S58B30. These are the core specifications for the engine family, and we’ll confirm the exact model-year rating and output of the specific unit we have in stock when you reach out.
| Spec | Detail |
|---|---|
| Engine code | BMW S58B30 (S58) |
| Configuration | Inline-6, twin mono-scroll turbochargers |
| Displacement | 3.0L (2,993cc) |
| Bore | 84 mm (3.31 in) |
| Stroke | 90 mm (3.54 in) |
| Compression ratio | 9.3:1 |
| Redline | 7,200 rpm |
| Block material | Closed-deck aluminum |
| Crankshaft | Forged chrome-molybdenum steel |
| Connecting rods / pistons | Forged steel rods, forged aluminum pistons |
| Valvetrain | Double VANOS, Valvetronic variable valve lift |
| Fuel system | Direct injection |
| Horsepower range | Roughly 453 to 503 hp depending on model and rating |
| Torque range | Roughly 406 to 479 lb-ft depending on model and rating |
| Production years | 2019 to present |
The output spread exists because BMW tunes the same core block differently for the M3 Competition, the wider X3 M and X4 M SUVs, and the top-tier CS and CSL variants. Tell us which chassis and trim you’re working with and we’ll confirm exactly which rating and output level fits, instead of just shipping whatever’s on the shelf.
Which Models Use the S58B30?
The S58B30 shows up across BMW’s current M lineup. It’s in the G80 M3 and G82 M4, in both standard and Competition tune, and it’s the engine under the hood of the X3 M and X4 M, and the larger X5 M and X6 M. BMW also used it in the G87 M2 for the 2023 and 2024 model years, and it powers the limited-run 3.0 CSL. Alpina used a variant of the same architecture in the B3 from 2019 to 2022 as well.
If you’re not sure whether the specific S58B30 we have in stock matches your chassis and model year, tell us your VIN or your exact trim, and we’ll confirm fitment before you buy, because output ratings and some ancillary hardware differ between these applications.
Why Buyers Choose a Tested BMW S58B30 Engine For Sale
Most people searching for a BMW S58B30 engine for sale have already looked at BMW dealer pricing for a factory replacement and landed on used and tested for one simple reason: cost. A factory-new or dealer remanufactured S58 is an expensive proposition once you account for the engine itself plus labor, and a full independent rebuild isn’t cheap either once you’re paying for machine work, a fresh set of forged internals if anything’s damaged, and turbo replacement or rebuild. A tested used S58B30 that’s already proven it runs clean, holds boost, and doesn’t have metal in the oil gets a car back on the road for a fraction of that cost.
There’s also the simple reality that this is still a relatively new engine platform, which means independent machine shops and even some dealers aren’t always set up to move fast on a full rebuild. Sourcing a verified used engine and having a competent shop handle the swap is often the quickest path back to actually driving the car, instead of waiting weeks on parts and labor scheduling.
A lot of our repeat customers are independent BMW and M-specialist shops who’ve been burned before by an engine listed as tested that turned out to have a cracked turbo housing or a rod knock hidden under a fresh detail job. We don’t do that. If an engine doesn’t check out clean, it doesn’t go out labeled as a running unit.
What a Used Engine Inspection Actually Catches
Before any S58B30 in our inventory gets listed as tested and ready, someone actually puts hands and eyes on it. That means a compression check across all six cylinders to confirm the rings and valves are sealing the way they should, a look at oil condition and the drain plug or filter for any metal that would point to bearing or piston wear, a check of both turbos for shaft play and oil leaks, and a check of coolant for any sign of oil or exhaust contamination that would flag a head gasket issue.
Where possible, we also run the engine, listen for knock or unusual noise, check for smoke under load, and confirm boost builds cleanly without any hesitation or fault codes tied to the turbos or the direct injection system. If an engine doesn’t pass, it doesn’t ship as a tested, running BMW S58B30. It’s either repaired first or sold honestly as a core or parts unit and marked as exactly that. That distinction is the whole reason to buy from someone who actually tests instead of someone who just lists whatever comes through the door.
Common Issues to Know About
No performance engine this highly strung is issue-free, and it’s worth knowing what to watch for before buying from anyone. Rod bearing wear has been a documented concern on early S58 production, which is exactly why we run a compression check and inspect oil for metal content before anything ships. Coolant loss and water pump or coolant expansion tank issues show up on higher-mileage units, so we check the cooling system specifically for that. Carbon buildup on the intake valves is a normal reality of direct injection engines and shows up over time as a slightly rougher idle, since there’s no fuel washing over the valves the way there is with port injection. And on cars that have been aggressively tuned before we got them, we check for evidence of over-boost or detonation damage that a casual inspection might miss.
None of this makes the S58B30 a bad engine to buy used. It just means the inspection has to be real and specific to the known weak points on this platform, not a generic once-over.
Comparing a Used S58B30 to a New or Remanufactured Option
A lot of buyers searching for a BMW S58B30 engine for sale started out pricing a brand-new or dealer remanufactured engine first and backed off once they saw the total, especially with labor included. Going new makes sense if the car is a long-term keeper and the budget supports it. But for a lot of owners, especially on a car that already has some mileage and age on the rest of the drivetrain, that math doesn’t work.
A tested used S58B30 sits in the middle. You’re not paying dealer markup for parts and machine work you can’t verify, and you’re not gambling on an untested core either, because we’ve already run compression and functional checks before it’s listed. For most M car owners weighing a repair against the value of the car, that’s the option that actually makes sense financially.
How We Source Our Inventory
We don’t build our S58B30 inventory by buying blind at auction and hoping for the best. These engines come out of cars being parted for reasons that have nothing to do with the engine, collision damage, electrical issues, or a dealer moving inventory that doesn’t need the drivetrain. When one comes in, it goes through our inspection process before it’s ever listed, and we keep notes on what we found so we can give you a straight answer instead of a guess when you call.
The market for these engines has its share of sellers who wipe an engine down, snap a photo, and list it as tested without ever actually running it. We’d rather sell fewer engines to customers who trust what we tell them than move volume on units we haven’t verified ourselves.
Installation Notes for Your Shop
If your shop is handling the swap, a few things are worth confirming up front. Match the exact engine code and output rating to your chassis, since M3, M4, X3 M, and X4 M applications can differ in mounting and ancillary hardware even though the core block is the same. Confirm ECU and wiring harness compatibility, since these engines rely on chassis-specific tuning and immobilizer pairing that has to be handled correctly during the swap. Replace turbo oil feed lines, coolant hoses, and gaskets during install rather than reusing worn parts, since a clean, tested engine can still develop a leak from old hardware that wasn’t replaced. And plan for proper ECU adaptation and a real road test before calling the job finished, since the S58 depends on accurate sensor calibration to run and boost correctly.
Signs Your Current Engine Needs Replacing
If you’re trying to decide between a repair and a full engine replacement, a few signs point clearly toward replacement. Persistent low compression across multiple cylinders that isn’t tied to one bad component usually means the internals have taken real damage. Metal in the oil, especially fine metal collecting on a magnetic drain plug, points to bearing or piston wear that’s only going to get worse. Rod knock or a deep mechanical noise under load is a serious warning sign on this platform specifically and shouldn’t be ignored. And persistent coolant loss with no visible external leak usually points to a head gasket or internal issue that’s more cost-effective to solve with a proven replacement engine than another round of repairs.
If any of that sounds familiar, it’s worth getting a straight quote on a tested S58B30 before sinking more money into a repair that might not hold.
Payment and How Shipping Actually Works
Once we’ve confirmed fitment for your exact chassis, we take payment, crate the engine properly, and ship it out. We ship worldwide, so no matter where you or your shop is located, we can quote freight to your door or to a freight terminal near you, whichever works best for your setup. The engine ships on a pallet or in a crate depending on the shipping method, and we photograph it before it goes out so you have a clear record of its condition at the time of shipment.
We’re upfront about lead times and freight costs before you pay, not after. If something about the quote doesn’t fit your timeline or location, tell us and we’ll work out the best option together.
More Frequently Asked Questions
How do I know this engine will fit my exact model?
Give us your VIN or your exact chassis and trim, and we’ll confirm fitment before you buy anything.
Do you sell the engine complete with turbos and accessories?
Each listing specifies exactly what’s included. Ask us directly if you need the turbos, wiring harness, or accessories, and we’ll tell you what’s on the specific unit we have in stock.
What kind of mileage do these engines typically have?
It varies by unit, and we disclose what we know about mileage and history when it’s available. Compression and inspection results matter more than a mileage figure nobody can independently verify anyway.
Is a warranty available?
Ask us about the current warranty terms on the specific engine you’re considering. We stand behind what we test and sell.
Do you ship outside the United States?
Yes. We ship worldwide, so wherever your shop or project is located, reach out and we’ll work out freight to get the engine to you.
Where the S58 Sits in BMW’s Engine Lineup
It helps to know where this engine fits relative to its relatives. The S58 shares its basic block architecture with the B58, the turbocharged inline-six found in regular 3 Series, X3, and other non-M BMW models, but the S58 gets the closed-deck block, forged internals, and twin-turbo setup that let it handle far more power reliably. It replaced the outgoing S55, the twin-turbo inline-six from the previous-generation M3 and M4, and it represents a meaningful step up in both peak output and the strength of the bottom end. If you’re cross-shopping this engine against an S55 or a completely different swap option for your build, tell us what you’re working with and we can help you think through which route actually makes sense.
Why the S58B30 Is Such a Popular Tuning Platform
Part of the reason demand for a BMW S58B30 engine for sale stays high is that this engine has real headroom built into it from the factory. The forged crankshaft, forged connecting rods, and forged pistons aren’t just marketing language, they’re the same kind of internals a builder would normally have to pay to install on a weaker factory engine before pushing real power through it. With the S58, that strength is already there stock, which is why tuners have been able to push these engines well past factory output with nothing more than a tune and supporting bolt-ons, and considerably further with upgraded turbos and fueling.
That matters if you’re buying a used engine for a build rather than a stock replacement. A tested, healthy S58B30 gives you a real foundation to build on instead of a question mark. If you’re planning to tune the engine after installation, tell us that up front, since it can change what we recommend in terms of inspection depth and what to check before you start adding power.
What a Failed Engine Actually Costs You
It’s worth being blunt about what happens when an S58 lets go. Rod bearing failure or a catastrophic turbo failure on this platform doesn’t usually stay contained to one part. Metal debris from a spun bearing can travel through the oil system and damage bearings elsewhere in the engine, and a turbo failure can send debris into the intake or exhaust tract. That’s why a full teardown and rebuild after a real failure often costs more than sourcing a tested replacement engine outright, and why we push buyers who are on the fence toward a verified used unit instead of gambling on a marginal repair to a damaged engine.
If your current S58 has already shown warning signs, rod knock, a check engine light tied to misfires or low compression, or visible metal in the oil, getting ahead of it with a replacement engine is usually cheaper in the long run than waiting for a full failure on the road.
Bottom line
If you need a BMW S58B30 engine for sale that’s actually been checked before it ships, not just cleaned up and photographed, that’s what we do. Compression tested, inspected for the failure points known on this platform, and shipped worldwide with a clear answer about condition and lead time. Contact us with your exact chassis and we’ll confirm fitment and get you a quote. You can also browse our other BMW engine offerings in the BMW Engine category, or see our Hellcat engine for sale and Corvette Z06 LT4 engine for sale if you’re comparing performance options across brands. For general background on this engine’s design and where it fits in BMW’s lineup, see BMW’s S58 engine history. Ready to move forward? Contact us and we’ll get your engine on the way.
