Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full potential of your 2018-2025 BMW X3 M40i or X4 M40i with the German Car Accessories GCA Performance ECU Tune, engineered specifically for the 3.0L Turbocharged B58 engine. Developed with performance, drivability, and reliability in mind, this calibration delivers substantial gains in horsepower and torque while enhancing throttle response and overall engine performance.
Designed by German Car Accessories under the GCA Performance lineup, this ECU tune transforms the driving experience by providing faster throttle response, stronger mid-range acceleration, increased top-end power, and smoother torque delivery throughout the entire RPM range. Whether you're commuting, enjoying spirited backroad driving, or visiting the track, the optimized calibration delivers performance you can feel every time you press the accelerator.
Every tune is calibrated for your selected fuel octane and includes advanced performance features such as configurable cold start settings, optional enhanced exhaust burbles, factory speed limiter removal, and support for upgraded downpipes with check engine light suppression for off-road use only.
For complete peace of mind, German Car Accessories securely saves your original factory ECU file, allowing your vehicle to be returned to stock software at any time. Every tune is backed by a 1-Year German Car Accessories Warranty.
Vehicle Fitment
This GCA Performance ECU Tune fits the following BMW models equipped with the 3.0L Turbocharged B58 engine:
2018-2025 BMW X3 M40i / X4 M40i (G01/G02)
- BMW X3 M40i
- BMW X4 M40i
Compatible chassis:
- G01 BMW X3 M40i
- G02 BMW X4 M40i
Engine Compatibility:
- 3.0L Turbocharged B58 Engine
Key Features
- Manufactured by German Car Accessories
- Part of the GCA Performance lineup
- Custom ECU calibration for the B58 engine
- Up to 60 HP increase
- Up to 60 lb-ft torque increase
- Sharper throttle response
- Improved mid-range and top-end power
- Octane-specific tuning calibration
- Factory speed limiter removal
- Configurable cold start (On/Off)
- Adjustable or extended exhaust burble options
- Downpipe readiness with check engine light suppression (off-road use only)
- Factory ECU data securely backed up
- 100% reversible calibration
- Stage 1 and Stage 2 tuning available
- 1-Year German Car Accessories Warranty
Performance Gains
- Horsepower Increase: Up to +60 HP
- Torque Increase: Up to +60 lb-ft
Tuning Options
- Stage 1: Factory Downpipes
- Stage 2: GCA Performance Downpipes
- Stage selection is confirmed after purchase.
- No additional charge for Stage 2 tuning.
Tuning Instructions
- Installation instructions are emailed after purchase.
- Remote tuning is completed using an ENET cable supplied by German Car Accessories.
- ECU unlock instructions are included if the ECU Unlock service is purchased.
- BMW models built after June 2020 (06/2020+) feature factory-locked ECUs. If the ECU Unlock service is not purchased, the customer must arrange an ECU unlock before tuning.
Specifications
- Engine Compatibility: 3.0L Turbocharged B58
- Installation Method: Remote ECU Flash
- Connection: ENET Cable Included
- Calibration: Octane-Specific
- Warranty: 1-Year German Car Accessories Warranty
