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    • BMW revising the S55 motor to create a 450+ hp S58 3.0 liter for the 2019 F97 X3 M and F98 X4 M

      The current S55 motor in the F80 M3 and F82 M4 is a powerhouse of an engine but it suffers from certain design issues. BMW supposedly resolved those issues but the S55 engine is getting a revision and new designation for the F97 X3 M and F98 X4 M models.


      It is interesting to note BMW is likely to continue with the 'S' designation here for M motors despite saying they will not longer use it. The reasoning in this application is likely because the S58 is a revision of the already 'S' designated S55. If it was a revision of the B58 engine, you likely would not see the 'S' designation.

      BMW is expected to increase the power to 450 horsepower but we all know the S55 motor already produces more than 450 horsepower. The reason for this increase will likely be to give the motor more torque to move heavier X SUV's which will also be sending power to all four wheels through an automatic. That means a less efficient drivetrain than the dual clutch and rear wheel drive F80 M3 and F82 M4 models.

      It is possible BMW equips the new M SUV's with a dual clutch transmission but considering that they are going to an automatic for the upcoming all wheel drive M5 and that the X5 M and X6 M both utilize automatic gearboxes prepare to be disappointed.

      Expect more details as we get closer to the 2019 model year launch.

      This article was originally published in forum thread: BMW revising the S55 motor to create a 450+ hp S58 3.0 liter for the 2019 F97 X3 M and F98 X4 M started by Sticky View original post
      Comments 9 Comments
      1. BlackJetE90OC's Avatar
        BlackJetE90OC -
        I figured next M3 would just get a revised S55. Gone are the days of M engineering new powerplants for each new generation.
      1. boostedmaserati's Avatar
        boostedmaserati -
        I just figured BMW would rebadge Camry's and call it efficient dynamics.
      1. Eleventeen's Avatar
        Eleventeen -
        I wonder if they will be using the GM/Ford collab 10-speed auto. I know BMW has used GM trannies in some models in recent years. I'd be surprised if a lot of other auto makers didn't go in that direction as well. Out of all the automakers, GM probably builds the best automatic transmissions out there. Maybe even better than a lot of the dedicated powertrain manufacturers.
      1. Bowser330's Avatar
        Bowser330 -
        But will it have a new crank hub design?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        But will it have a new crank hub design?
        That's the general thinking.
      1. BlackJetE90OC's Avatar
        BlackJetE90OC -
        Revised S55...so basically the next M3 is going to sound like sh*t too.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by BlackJetE90OC Click here to enlarge
        Revised S55...so basically the next M3 is going to sound like sh*t too.
        Let's see what happens. This isn't set in stone or officially confirmed and maybe BMW sneaks in a B58TU or something.

        Not that it will help with the sound quality much but they seem to care about M exhaust noise again based on the F90 M5 spy videos.
      1. Bowser330's Avatar
        Bowser330 -
        S58 M3 AWD!!!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        S58 M3 AWD!!!
        Man let's hope not...