S63TU F90 ECU Tune
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S63TU F90 ECU Tune

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S63TU F90 ECU Tune
Weistec Horsepower 705
Weistec Torque 675
Manufacturer Weistec
Street legal in all the US States No
Engine Family S63tu
Stock Horsepower 600
Stock Torque 553

All 2020 models require bench flashing at this time.

ECU Tuning Process: How do I get my ECU tuned?

The Weistec S63TU F90 tune provides solid gains through out the entire powerband, This is on a vehicle with stock exhaust and turbos.  Additional upgrades will result in even more power.

In addition to the performance gains, there are a couple options available for race vehicles.  First is the "Burble".  The S63TU comes from the factory with this in a mild form.  You can choose "Off" "Mild" or "Aggressive" for the "Burble".  Many seem to prefer aggressive, but we gladly will let you choose based on your preference. The other race vehicle option would be Catalyst Heating.  On race vehicles, many times the catalysts are removed. In those cases, there is no need for the catalyst heating which would just be making excessive noise on a cold start of the race vehicle. If you have a race vehicle with the catalysts removed, Catalyst Heating can be disabled. 

Cypher Handheld | Powered by Weistec (ONLY FOR 2018, 2019 MODELS)

The Cypher is an optional upgrade when purchasing a Weistec tune for your Fxx series BMW. Simply navigate our website to the tune you wish to purchase. On the tune's product page there will be a drop-down menu giving the option to add Cypher to your tune order. From there, the order is processed, and a Cypher tool will be shipped to you

  • No need to send in your ECU / DME computer
  • Swap tunes file or return the stock within minutes.

    Weistec S63TU ECU Power 

    What does all this mean to you?  More power, sharper throttle response, and consistent performance with out sacrificing refinement. 

    ECU Tuning Process: How do I get my ECU tuned?

    Key Features:

    • Improved Throttle Response

    • Optimized Fuel, Spark, and Boost

    • Signifigant wheel horsepower and torque gains through the whole power band

    • S63TU "Burble" Mild and Aggressive Options (for Race Vehicles only)

    • Disabled Cold Start (for Race Vehicles only)

    • Disabled Speed Limiter

    *Power gains vary based on model, modifications, fuel, and running conditions.
    year make model trim engine
    2020 BMW M5-Competition 8AT (F90) Twin Turbo 4.4L V8 (S63)
    2019 BMW M5-Competition 8AT (F90) Twin Turbo 4.4L V8 (S63)
    2018 BMW M5-Competition 8AT (F90) Twin Turbo 4.4L V8 (S63)
    2020 BMW M5 8AT (F90) Twin Turbo 4.4L V8 (S63)
    2019 BMW M5 8AT (F90) Twin Turbo 4.4L V8 (S63)
    2018 BMW M5 8AT (F90) Twin Turbo 4.4L V8 (S63)
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    All products are shipped via UPS or FedEx SIGNATURE REQUIRED (unless otherwise specified). Please allow up to 48 Hours to process and ship your order; if you have a time sensitive shipment please give us a call to ensure there are no delays. Special arrangements may need to be made for international orders and oversize packages.

    Please be aware that 3-day, 2-day and next day air shipping does NOT include the weekends. For example an order with 2-day air shipping that ships out on a Friday will be delivered on Tuesday.

    In order to keep costs down and provide parts at competitive prices, many items are shipped directly from one of our authorized Rennwerks shipping locations. We cannot guarantee stock on these items until the order is placed. We will notify you if an item is not available to ship immediately.

    While we strive to ensure accuracy of all orders that are shipped on extremely rare occasions boxes are mislabeled and/or wrong parts are shipped. Once you have received your order be sure to CHECK the parts for accuracy prior to starting your installation!


    All items to be returned, whether flawed or incorrect merchandise can be returned within 30 days of the original ship date. ALL returns may be subject to a 20% restocking fee.


    Call customer service at 1-408-800-4485 from 9:00 to 5:30 PST, Monday through Friday. They will issue you a Return Material Authorization Number (RMA#). Display this RMA# visibly on the outside of the return packaging. Enclose a copy of the original invoice with the returned merchandise. All returns must be pre-paid shipping and fully insured. We do not accept collect shipments or unauthorized returns. When the return is due to our error, we will refund the pre-paid freight charges and immediately exchange the item(s) or provide a refund.

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    Upon receipt of an obviously damaged package, you have the option to refuse delivery and the order will be returned to Rennwerks. Or you can receive the order-making, not of visible damage in writing to the carrier. If upon inspection of the parts you find damage due to the carrier's handling you then have 48 hours to file a claim with the carrier. DO NOT RETURN THE DAMAGED PARTS TO RENNWERKS. Keep the package and parts as close as possible to the condition you received them. Without the package, the carrier will void your claim. Claims for shortages due to carrier negligence must be made within 5 working days of receipt of merchandise.


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