
The B58 engine is a turbocharged 3.0-liter inline-six found in a wide range of BMW models and, notably, the current-generation Toyota Supra. This engine is highly regarded for its robust power delivery, smoothness, and tuning potential. If you're looking for a car with this powertrain, your options span various BMW series from the compact 3-Series to the full-size X7 SUV.
The B58 is part of BMW's modular engine family and features a closed-deck block design for strength, direct fuel injection, and Valvetronic variable valve lift. It has been updated over the years, with the latest technical iteration often referred to as the B58B30M2 or B58TU2 (Technical Update 2), found in the newest models.
Here is a list of BMW and Toyota models known to be equipped with the B58 engine:
| Model | Body Style | Model Years (Approx.) | Key Distinction |
|---|---|---|---|
| BMW 340i / M340i | Sedan | 2016-Present | The performance-oriented variant of the 3-Series. |
| BMW 440i / M440i | Coupe, Gran Coupe, Convertible | 2017-Present | Includes the distinctive new 4-Series grille design. |
| BMW X3 M40i | SUV | 2018-Present | A high-performance compact SUV. |
| BMW X4 M40i | SUV Coupe | 2019-Present | The coupe-style version of the X3. |
| BMW Z4 M40i | Roadster | 2019-Present | The open-top sports car, sharing its platform with the Supra. |
| BMW 540i | Sedan | 2017-Present | A mid-size luxury sedan offering a blend of comfort and power. |
| BMW 640i GT | Gran Turismo | 2018-2023 | A luxury-focused liftback with ample space. |
| BMW X5 xDrive40i | SUV | 2019-Present | The core engine option for the popular mid-size X5 SUV. |
| BMW X6 xDrive40i | SUV Coupe | 2020-Present | The sportier, sloping-roof version of the X5. |
| BMW X7 xDrive40i | SUV | 2019-Present | Powers the largest SUV in BMW's lineup. |
| Toyota GR Supra | Coupe | 2020-Present | The reborn sports car, with engines sourced directly from BMW. |
When considering a used model, it's important to note that the B58 has a strong reputation for reliability compared to some of its predecessors. However, always get a pre-purchase inspection from a trusted mechanic. The engine's widespread use means strong aftermarket support for parts and tuning, making it a favorite among enthusiasts.

You'll find the B58 in most of the sporty "40i" BMWs from the last several years. Think the 340i sedan, the X3 M40i SUV, and the Z4 M40i roadster. The big surprise is the Toyota Supra—it's basically a BMW engine under the hood. It's a fantastic motor: smooth, powerful, and pretty bulletproof. Just look for that "40i" badge on the back of any newer BMW, and you've likely found one.

As a car guy who's followed this engine since it came out, the B58 is a gem. It's not just about the power; it's how it delivers it. You get it in the obvious sporty cars like the M340i and the Supra, but also in bigger vehicles like the X5 and X7, where it provides effortless acceleration. The key thing is its tuning potential. A simple software tune can unlock a significant amount of extra horsepower safely, which is why it's so popular in the modding community.

From a purely practical standpoint, the B58 is a great choice if you're looking for a powerful and efficient used luxury car. We see a lot of them at the shop, and they've been very reliable. They're in everything from the 5-Series sedan to the X4 SUV. My advice is to focus on the service history. Even a great engine needs timely oil changes. The B58 is a long-term keeper if it's been well-maintained, so a clean record is more important than finding the absolute lowest mileage example.


