Is the S58 reliable?
We rate the S58 85 of 100 for reliability: strong. The rating is one of the inputs to every Guide Score below, and it is argued for on the method page with the others.
Why that rating
The lit mark is the S58; each grey mark is another engine on the engines page.
The current M engine, with a good record so far; unlike the S55, it has no crank hub worry. Parts sellers report coolant tank and charge-air cooler leaks, so watch cooling on tracked cars; too new for true high-mileage data.
Cars in this guide with the S58
| Car | Years with this engine | Reliability | Guide Score |
|---|---|---|---|
| M2 G87 | 2023 to 2027 | 88 to 89 | 97 (2026) |
| M4 G82 | 2021 to 2027 | 86 to 89 | 95 (2026) |
| M3 G80 | 2021 to 2027 | 86 to 89 | 91 (2026) |
| M4 G83 | 2022 to 2027 | 85 to 88 | 74 (2026) |
| X3 M F97 | 2020 to 2024 | 82 to 85 | 68 (2024) |
| X4 M F98 | 2020 to 2025 | 82 to 85 | 66 (2025) |
Reliability is each car's score out of 100 for the years it had this engine: the engine rating plus that car's own known problems, service costs and age. The Guide Score is for the car's best year to buy.
Known problems on the S58
| Problem | Named in the guides for | Typical bill |
|---|---|---|
| Coolant leaks | X3 M F97, X4 M F98 | $1,200 |
| Carbon buildup on the intake valves | X3 M F97, X4 M F98 | $600 |
Bills are the guides' estimates, not quotes; each car's guide says which model years a problem hits and how to check for it. The bars share one scale, up to the costliest bill here.
Other engines
Every engine we rate, from the most reliable down, is on the engines page.