Fabspeed XperTune Performance Software for E46 BMW M3

Fabspeed XperTune Performance Software for the E46 BMW M3 is calibrated to maximize the 3.2L straight-six’s power and response without sacrificing drivability or reliability. Instead of traditional bench flashing, the included handheld connects to the car’s OBD-II port and your computer so you can read, load, and flash the ECU at home — no removal or mailing required. The tune refines key strategies such as sensor inputs and air/fuel targets to improve horsepower, torque, and throttle mapping, yielding a stronger midrange and a smoother, more linear pull to redline while preserving OEM-like manners.

Features

• +22hp / +16tq
• Improved engine performance
• Drivability remains uncompromised
• Handheld tuner

Applications

• BMW M3: E46 (2002-2006)
  [S54 – 3.2L I6]

Notes

• Please review the tuning guide in the instructions and email the ECU tuning Information form. This form is utilized to ensure your needs are met and to consider your modifications for the best possible product.
• You must have access to a PC / Windows computer (Mac OS not supported) to upload your factory file information to Fabspeed via email and in turn apply their ECU Tune to your handheld device
• Upon sending your vehicle information, Fabspeed’s tuner will email you a custom ECU Tune(s) within 1-2 business days
• The handheld device “marries” with your vehicle and can only be used on one vehicle
• Special requests and tune file upgrades may be subject to additional fees
• This device allows you to flash the vehicle back to stock without sending in your ECU

Tuning Notes

• Step 1 – Read stock data on vehicle via OBD-II port with handheld
• Step 2 – Interface handheld with software on your computer and send in data to Fabspeed Motorsport via email
• Step 3 – They use this data along with information you provide about your vehicle to write a tune for your specific setup and email back your custom tune in 1-2 business days
• Step 4 – Write the Fabspeed ECU Tune to your handheld, then to the vehicle with the handheld

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.