BMW S58
BMW S58 (2019-): specifications, reliability, common problems and every car that has it.
- Displacement
- 3.0 L
- Layout
- Inline-6 twin-turbo M petrol
- Power range
- 453–543 hp
- Produced
- 2019–now
The S58 is the M division’s 3.0-litre twin-turbocharged inline-six, in production since
2019. It powers the M3, M4, M2, X3 M and X4 M, and it is the engine that replaced the
S55 — the last M six before it.
What the S58 is
A 3.0-litre twin-turbo inline-six, certified at 2,998 cc in every US application. It
shares its architecture and displacement with the standard-range
B58 but is a distinct engine: two turbochargers instead of one,
and a state of tune that runs from 453 hp to 543. The two are not interchangeable, and a
car with one is not a car with the other — the M badge is the reliable signal.
Output by car
Unlike the B58, where output tracks the model, the S58’s figures track the
version: base, Competition and CS are three different states of tune of the same
engine. Figures below come from EPA certification records.
| Car | US model years | Output |
|---|---|---|
| M2 | 2023–2026 | 453–473 hp |
| M2 CS | 2026 | 523 hp |
| M3 Competition | 2021–2026 | 523 hp |
| M3 CS | 2024 | 543 hp |
| M4 | 2021–2026 | 473 hp |
| M4 Competition | 2021–2026 | 503–523 hp |
| M4 CS, M4 CSL | 2022–2026 | 543 hp |
| X3 M | 2020–2024 | 473 hp |
| X3 M Competition | 2020–2024 | 503 hp |
BMW also fitted the S58 to the X4 M and the XM. The 90 hp between the base M4 and the
CSL is the widest spread of any single BMW engine we track outside the
B48, and unlike the B48 it is achieved without changing the
model.
Reading the badge
Three names, three outputs, one engine. In US cars the pattern holds across model
lines: the base version sits at 473 hp, Competition at 503, and the CS or CSL versions at
543. The M3 is the exception — since 2021 the US market has had the Competition version
at 523 hp rather than a base car, which is why the M3 line in the table above starts
higher than the M4’s.
If you need to know which version a specific car is, the
specification page for that model year lists the certified output by
version, and the VIN decoder resolves the model year and
plant.
What we do not publish
No reliability rating. BMW does not publish failure rates, and the NHTSA complaints
database records complaints against a vehicle rather than an engine. For the S58 the
problem is sharper than usual: NHTSA lists these cars as “3 SERIES” and “X3”, which puts
an M3 alongside a 330i with the four-cylinder B48 in the same
bucket. Nothing engine-specific can honestly be extracted from it.
Common questions
How much horsepower does the S58 have?
Between 453 and 543 hp in US cars, depending on the version: 453–473 in the M2, 473 in
the base M4 and X3 M, 503 in the Competition versions, 523 in the M3 Competition and
M2 CS, 543 in the M3 CS, M4 CS and M4 CSL.
Is the S58 the same as the B58?
No. Both are 3.0-litre inline-sixes and they share an architecture, but the
B58 uses one turbocharger and makes 320–382 hp, while the S58
uses two and makes 453–543. The S58 is an M division engine.
What did the S58 replace?
The S55, which powered the previous M3, M4 and the
M2 Competition through 2020.
Which cars have the S58?
The M2, M3, M4, X3 M, X4 M and XM.
Sources
- EPA — Annual certification test data: rated horsepower, displacement, engine family codes and model-year coverage for every US-certified version. All output figures on this page come from these records.
- NHTSA — datasets and APIs: the complaints database referred to above, which records complaints by vehicle rather than by engine.