Audi A4

Audi A4 40 TFSI Tuning Software by Westtuned

At Westtuned, we specialize in high-performance Audi A4 40 TFSI tuning software. Our custom ECU solutions unlock the full potential of your engine, delivering sharper throttle response, stronger mid-range torque, and a more aggressive power curve — all while maintaining OEM-level drivability and reliability.

Every Westtuned calibration is developed using live dynamometer testing, targeting safe air-fuel ratios and optimised boost levels throughout the full RPM range. Our Stage 1 solutions are built to be reliable for daily driving as well as track day use.

Whether your Audi A4 40 TFSI is running stock hardware or upgraded with intakes, downpipes or a performance exhaust, our software is optimised to suit your exact build.

Choose Westtuned for:

• Custom ECU remapping for Audi A4 40 TFSI
• Stage 1 performance software
• Improved throttle response and torque delivery
• Safe, data-driven tuning with reliability in mind

Don't let factory software limit what your Audi A4 40 TFSI can do. Trust Westtuned to deliver the performance gains your engine deserves.