The 2025 BMW X3 M50 introduces a brand new chapter in BMW’s efficiency SUV lineup, not solely changing the sensible X3 M40i, but additionally that includes an up to date B58 engine. Codename B58B30M2, the up to date 3.0 liter six-cylinder TwinTurbo comes with a sequence of {hardware} and software program upgrades, constructing upon the already profitable earlier generations.
Engine Specs
The workhorse B58 engine got here to life in 2015. It’ half o f BMW’s modular engine household, every engine utilizing a displacement of 500 cc (30.5 cu in) per cylinder. It’s the one 3.0 liter six-cylinder turbo powerplant provided in the present day by BMW and it has the following specs:
- Bore x Stroke: 82.0 mm x 94.6 mm
- Displacement: 2,998 cm³
- Compression Ratio: 11.0:1
- Max system energy: 393 @ 5,200-6,250 rpm
- Max system torque: 428 lb-ft @ 1,900-4,800 rpm
- Output per liter: 131.0 hp/liter
Engine Updates
There are a number of improvements that the B58B30M2 variant dropped at the BMW lineup in 2022, and in accordance with BMW, extra updates had been additionally carried out within the variant within the new 2025 BMW X3 M50 The B58B30M2 engine operates on the Miller cycle and incorporates a number of upgrades, together with:
- Injection System and Crankshaft: Enhanced for improved efficiency and sturdiness.
- Ignition System and Exhaust Gasoline Routing: Revised for optimized effectivity.
- eVANOS: Electrically managed camshaft adjustment for exact engine administration.
- Turbocharger: Adjusted for higher energy supply.
- Oil Provide: Additional optimized to make sure environment friendly lubrication below high-performance circumstances.
Further M-specific enhancements embrace a strong crankshaft drive, optimized piston oil provide with cooling channels, and new major bearing shells and caps. The M TwinPower Turbo expertise options elevated turbo efficiency and twin injection for improved combination preparation.
Delicate-Hybrid Powertrain
We’ve talked at size about the advantages of a mild-hybrid powertrain. So it comes as no shock that the brand new X3 M50 additionally will get the 48V mild-hybrid tech. For 2025, the BMW X3 M50 combines the B58 engine with a mild-hybrid system, integrating a crankshaft-mounted starter generator. Because of that, the hybrid system delivers a complete output of 393 hp and 428 lb-ft (580 Nm) of torque. The combustion engine alone produces 375 hp and 398 lb-ft (540 Nm), whereas the electrical motor contributes 17 hp and 147 lb-ft (200 Nm).
Efficiency Metrics
- 0 to 62 mph (100 km/h): 4.6 seconds
- 0 to 60 mph (96 km/h): 4.4 seconds (US-spec mannequin)
- Prime Pace: Electronically ruled at 155 mph (250 km/h)
The electrical motor is built-in into the eight-speed automated transmission, contributing to clean and fast gear modifications. As we’ve examined again in April on the observe, this setup helps the X3 M50’s acceleration and drivability throughout varied circumstances. It’s actually extra responsive, particularly on this M50 utility the place the X3 is bigger and heavier than ever earlier than.
BMW is predicted to proceed enhancing the B58 engine, significantly as a number of of their new fashions are deliberate to have manufacturing cycles extending properly past 2035.
