Next BMW X3 M Tipped To Debut New S58 Engine

BMW has typically been more cautious about how many models get the full M treatment than, say, arch-rival Mercedes is with its prolific AMG models. But the lineup is expected to grow by at least one more in the near future.

That model is the highly anticipated X3 M – high-riding counterpart to the M3, top version of the forthcoming compact crossover, and baby brother to the larger X5 M and X6 M. And now we’re hearing rumors of what BMW will slot underneath the hood.

According to Autoevolution, the X3 M will be the first beneficiary of the new S58 engine. Replacing the S55 that powers the M3 and M4, the new S58 will be based on the B58 that appears in 40i models – from the M140i all the way up to the 740i.

Like the S55, the B58 is a 3.0-liter turbocharged inline-six. In its current form, it employs a single twin-scroll turbocharger, direct injection, variable valve timing, and a water-to-air intercooler to produce between 322 and 335 horsepower. The S58 on the other hand will have bigger shoes to fill: expect twin turbochargers in this application to produce upwards of 450 horsepower, surpassing even the M3 Competition Pack for output – and putting the current X3 xDrive35i with its 302 horsepower to shame.

From there the engine will be slotted into the next M3 and M4 – and for output levels to increase from there with more potent versions to follow.

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  • Christian

    Who want’s a X3 M thou?

    • TheBelltower

      The X5 is a bit of a whale. So an X3M may perform a lot better.

      • Christian

        Why not stick with the M3 then?

        • TheBelltower

          For all the reasons people like crossover SUVs. There’s an audience for it. I have a feeling it’ll do a lot better than the M version of the X5. But I doubt it’ll eat into sales of the M3.

        • Vitaliy Shtym

          Because I want to daily it, roads suck royally, we get plenty of snow here, I want to take it camping.

    • Kaisuke971

      After looking at some BMW forums, quite a lot of people

      • Belthronding Tinuviel

        can’t believe this shit..

    • Vitaliy Shtym

      I do, I have 07 X3 m sport and it handles phenomenal but lacks power. Newer x3s are too soft. This might be great

  • Kaisuke971

    The engine will probably make 480 ponies in the X3 M and 500+ in the next gen M3.

  • Belthronding Tinuviel

    from ‘ultimate driving machine’ to X3M..

  • Harry_Wild

    This is going be expensive! It suppose to compete with the Macan Turbo which full load tops off at $140K!

    • CarbonX3M

      A loaded X5M is $115k. The X3M will be about $85k. Porsches are stupidly overpriced.

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