BMW X4 xDrive28i — Custom BM3 Tune (N20)
Logged, verified, revised. Documented in writing. Yours to keep.
A custom bootmod3 calibration for the F26 X4 xDrive28i (N20) — built from datalogs on your car, not a map off a shelf. We start from what your engine is actually doing in fuel trims, timing, knock, and load, and revise against the next log until the math and the data agree.
How we approach it
Math first, datalogs second, marketing claims a distant last. We don't publish dyno numbers we can't reproduce; we tune to what your specific car does on the fuel you actually buy. Delivery is over bootmod3 — a BM3 license and an ENET cable are required for flashing.
Staging
Stage 1 runs on the stock hardware. Stage 2 expects an aluminum charge pipe and a front-mount intercooler. Higher stages depend on supporting hardware and fueling; we scope those against your build rather than promise a fixed result. On the xDrive drivetrain, traction is less the limit than it is on a rear-drive car.
The matched Stage Kit for this engine — components + the calibration sold as one decision — is the Stage 2 Kit — N20. 8% under buying the parts and tune à la carte.
Pick your stage.
Returning customer? Skip the configurator and order direct. Your tune will be calibrated and emailed once we have your VIN and datalog — we will ask for both after checkout if you do not add them here.
How we calibrate this platform.
Before you tune.
How long until I have a working tune?
4-5 business days from datalog receipt for Stage 1; 7-10 days for Stage 2.
Do I need supporting hardware for Stage 2?
Chargepipe and a fuel system check are recommended. E30 flex requires a flex-fuel kit on chassis that don't ship one factory.
Can I revert to stock for warranty service?
Yes. BM3 supports non-destructive stock revert. Most customers revert before dealer appointments and re-flash after.
What VIN do I enter at checkout?
The 17-character VIN of the car you're tuning. It appears on the driver-side dash, door jamb sticker, and registration.