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ENGINEERING THE FUTURE OF PERFORMANCE ™
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BMW S58 ECU Tune
    BMW S58 ECU Tune
    Purchase BMW S58 ECU Tune
    • SKU: 05-558-00334-3

      BMW S58 ECU Tune

    • Power gain Up To

      +147 HP

      Torque gain Up To

      +189 TQ

      Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

      Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

      Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

      Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

      Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

      Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

      Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

      Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.
    • Stage:
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    • $699.00 $699.00 $594.15 $594.15

      2026 Labor Day Sale 15% off: $104.85

    • How To Tune
    • Prop 65 warning
      Warning

      This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
    Weistec Horsepower 620
    Weistec Torque 595
    Manufacturer Weistec
    Street legal in all the US States No
    Stock Horsepower 473
    Stock Torque 406
    See more
    year make model trim engine
    2023 BMW M4 CSL Base 8AT (G82) Twin Turbo 3L I6 (S58)
    2025 BMW X4 M Competition 8AT (F98) Twin Turbo 3L I6 (S58)
    2025 BMW X3 M Competition 8AT (F97) Twin Turbo 3L I6 (S58)
    2026 BMW M4 Competition Convertible 8AT (G83) Twin Turbo 3L I6 (S58)
    2025 BMW M4 Competition Convertible 8AT (G83) Twin Turbo 3L I6 (S58)
    2026 BMW M4 Competition Base 8AT (G82) Twin Turbo 3L I6 (S58)
    See more

    Product Description


    Important Notes:

    • ECU Unlock Required

    Weistec Power and Reliability

    Weistec specializes in engineered performance solutions with designs that match and often exceed OEM levels of precision and quality. Our calibration team meticulously crafted an ECU Tune for your BMW M3, M4, X3 M, and X4 M. Designed to completely revamp your vehicle’s driving characteristics without compromising reliability, it lets you get even more out of your machine. When paired with our BMW M Series TCU Tune, you will achieve a complete driver-focused experience - a perfect addition to your vehicle.

    Key Features

    • Gain up to 167 HP and 217 FT-LB
    • Optimized Fueling
    • Increased Torque Limits
    • Optimized Ignition Timing
    • Removed Speed Limiter
    • Increased Boost

    Related Items

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    $600.00
    Add To Cart

    How Do You Get Your BMW S58 ECU Tune Tuned?

    Follow these steps — from whether your ECU needs unlocking first, to rounding out the upgrade so nothing holds it back.

    1

    Unlock Check

    This ECU requires an unlock first

    Modern ECUs are often locked down, especially after a dealer software update, which can block bench flashing or OBD flashing. Our ECU Unlock Service removes those restrictions, is done per ECU, and stays active through most future dealer updates as long as the bootloader isn't overwritten.

    Read the full ECU Unlock breakdown →
    2

    Pick Your Tuning Method

    See the full tuning process →
    1

    Cypher Plus

    Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Available on most supported vehicles. Watch how it works.

    2

    In Person

    Bring your vehicle, or just your ECU/TCU, to our Anaheim, CA headquarters. Call 714-202-0005 or email sales@weistec.com to schedule.

    3

    Cypher Pro Dealer

    Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.

    4

    Mail It In

    Remove your ECU or TCU and mail it to us for tuning. Required for some applications; see notes above.

    3

    Choose Your Tune Options

    Want it louder?

    This tune can have Burble/Pops added or increased on deceleration, at no additional charge. Select it in the app when requesting your tune with Cypher+, or mark it on your tune request form when mailing in your ECU.

    Read more about Burble & Pops →

    Want to stop the stopping?

    Auto Start-Stop can be turned off as part of your ECU tune alone, at no additional charge. Select it in the app when requesting your tune with Cypher+, or mark it on your calibration request form when mailing in your ECU.

    Read more about Auto Start-Stop →
    4

    Complete The Upgrade

    An ECU tune alone won't remove all factory limits or fix how power reaches the ground. Add these to round out the upgrade with no limitations.

    What is a CPC module?

    The CPC (Central Powertrain Control) is a separate control unit that manages things like the active exhaust valves, radiator fan, intercooler pumps, and speed limiter. On many newer Mercedes-Benz vehicles, it also houses torque limiters that can hold back an ECU tune from reaching its full potential.

    Read the full CPC & TCU breakdown →

    What is a TCU tune?

    A TCU (transmission control unit) tune delivers faster, firmer shifts with higher line pressure, reducing clutch slip and increasing the transmission's torque capacity. It's a worthwhile upgrade on its own, or paired with an ECU tune for a fully sorted powertrain.

    Read the full CPC & TCU breakdown →

    Good to Know

    • This is a reflash of your original module, not a stand-alone unit.
    • Power gains vary by vehicle, modifications, fuel, and operating conditions (ambient temperature, altitude, etc.).
    • Product may not be emissions compliant. Check local laws prior to installation.
    • Always use a battery charger during programming.
    • Newer vehicles may require an ECU Unlock before tuning is possible.