Engine and transmission calibrations built around the hardware you actually have — engine wear, fuel system, boost, altitude and the fuel in your tank.
Engine calibrations: boost, timing, fueling, torque limits. Ready or custom, delivered online.
Engine tunesTransmission software: faster, smoother shifts and torque limits that match your engine tune.
Transmission tunesTuned on your datalogs for your mods, your fuel and your altitude — as far as your hardware safely goes.
Why customDiagnostics, maintenance, repair and installs in our own shop. Opening soon.
Get notifiedA Ready Tune is a proven map with moderate gains and a safety margin built in — it has to be safe for every healthy car of your model. A Custom Tune is calibrated for one car: yours.
Safe, proven, mid-level settings for a healthy stock car. Buy, download, flash.
At our shop: $700 — no dongle needed
Locked BMW DME? Unlock with your tune: +$100
We tune your actual car. Your datalogs show what your engine, fuel system and turbo can really do — and we calibrate right up to that, safely.
At our shop: from $1,000 — no dongle needed
Locked BMW DME? Unlock with your tune: +$100
Add a TCU (transmission) tune to either one: +$300. Not sure which one? Tell us about your car — we'll tell you honestly if a Ready Tune is enough.
Every tune is verified on your car's real datalogs — on day one, after it settles in, and again when the season turns. Logs are required. Reviewing them costs you nothing, and so do the changes they lead to.
Before you drive it hard, record a log. We confirm boost, fueling, timing and knock are right where they should be.
By now your ECU's fuel trims and knock learning have adapted, and you've burned a few tanks of fuel. We look again with fresh logs.
Every dongle tune — ready or custom — comes with mandatory datalogs. No logs, no guesswork. It's how we stand behind your engine.
If a check shows your car needs a change — summer heat, winter cold, a pump that can't keep up — we revise the map at no extra cost. New hardware or a different fuel is a new, paid revision.
No dongle needed — we flash it and log it ourselves.
Two identical cars leave the factory the same — and stop being the same a few thousand miles later. A ready map has to stay safe for all of them. A custom map is written for one.
Illustrative example. A ready map can't see this — it assumes a healthy pump. A custom tune is built from your logs, so we tune around it.
Mileage, compression and carbon build-up change how much timing an engine tolerates.
Some pumps can't hold rail pressure at high RPM. We see it in your logs and tune around it.
Turbo health, boost leaks, intake and intercooler all change what's safe.
91, 92, 93 or E-blends like E40 — each fuel needs its own timing and fueling.
In thin mountain air the turbo spins faster for the same boost, and hot days bring knock. Your map should know where you drive.
Intake, downpipe, intercooler, injectors, turbo — tuned together as one system.
BMW G-series 340i · 540i · X3 M40i
8-speed automatic · faster shifts, raised torque limits
VIN, mods, fuel, altitude and what you want from it.
Read it with the dongle and upload it to your account. We keep a copy, always.
A base calibration for your exact hardware and fuel.
Upload datalogs — required, and every review is free. We refine timing, boost and fueling.
Final map in your account. Tune Care checks it again at 500–1,000 miles and next season.
Since mid-2020, most BMW DMEs leave the factory locked against tuning. We unlock supported DMEs right here in our shop — bring the car in, or mail us the DME.
Per DME, when you tune with us — ready or custom.
Per DME. Not tuning with us? We unlock your BMW DME and you're done.
Newer Mercedes-Benz, Audi and other ECUs — and DMEs we have to send out for unlock. Price on request.
Heads up: unlocking returns the DME to stock — any tune already on it is erased.
Ship us your DME — same price: $100 with a tune, $200 unlock only. You cover shipping both ways.
V8 and V12 engines with two DMEs — the price is per DME.
Some units, like the S68 DME9, have to be sent out for unlock. We handle it — price on request.
| Engine | Example models | Status |
|---|---|---|
| B46 / B48 2.0T · Bosch | 230i · 330i · 430i · X3 30i · MINI · Supra 2.0 | Unlock in shop |
| B58 3.0T Gen 1–2 · Bosch | M240i · M340i · M440i · 540i · X3 M40i · X5 40i · Z4 · Supra 3.0 | Unlock in shop |
| S58 3.0T | M2 · M3 · M4 · X3 M · X4 M | Unlock in shop |
| N63 / S63 4.4T V8 | M550i · X5 M50i · M5 (F90) · X5 M · X6 M · M8 | Unlock in shop |
| S68 4.4T V8 · DME9 | M5 (G90) · XM · X5 M60i · 760i | Sent out · on request |
| B58 Gen 3 · Vitesco DME9 | 2025–2026 M340i | Not yet |
| S58 latest production | 2025–2026 M3 · M4 | Not yet |
Supported cars: through model year 2024. 2025+ cars — we check your DME first. “Vitesco” printed on the DME case means Gen 3: not unlockable yet. The list changes as new unlocks are released — ask us about your car.
Diagnostics, maintenance, repair and performance installs — done in-house by the same people who write your tune.
Coming soon
Check engine light, misfire or a weak pull? Find the cause before you add power. AutoDX is our own diagnostics platform: enter a VIN, fault codes and symptoms — three independent expert assessments are checked against factory repair manuals and reconciled into one root-cause verdict, with the exact parts to fix it.
ECU and DME both control the engine — DME is simply BMW's name for it. The TCU controls the automatic or dual-clutch transmission: shift speed, shift points and torque limits.
Ready Tunes use moderate targets with a safety margin, for healthy cars on the fuel you select. If your car is modified, high-mileage, or you want more power, go Custom.
Yes — that's how we tune SUVs. They get extra margin: torque is held in check under heavy load, and boost is pulled back at altitude, where thin air makes the turbo spin faster for the same boost. Towing often or living up high? Go Custom and tell us your trailer weight and where you drive.
Because every car is different — and a log is the only way to see yours. We check your logs on flash day, after 500–1,000 miles and again next season. We review every log within 24 hours. Changing fuel or adding mods? Send a log before you push it.
No. Log reviews are always free, and if a Tune Care check shows your map needs a change, the revision is free too. A Custom Tune is built for the hardware and fuel you told us about — if you change them later (new turbo, intake, injectors, a different fuel), that's a new, paid revision.
You get your money back for the tune. If something else goes wrong, we refund up to the price of the tune — that's the maximum. See our Terms & Disclaimer.
No. Tuning is a modification of your car's software and every tune is custom work, so we can't give a warranty or take responsibility for the engine, transmission or other parts. In any case, the most we refund is the price of the tune. Tuning may also affect your factory warranty.
A small device that plugs into your car's OBD port. You use it to flash your tune and record datalogs for us. Getting flashed at our shop? You don't need one.
Most supported Bosch DMEs — yes: $100 per DME with a Bayrabbit tune, $200 per DME for unlock only. Bring the car in, or mail us the DME (you cover shipping both ways). Unlocking returns the DME to stock, so any tune already on it is erased. Two DMEs (V8 / V12) cost ×2. 2025–2026 M340i (Gen 3 B58, Vitesco DME) and the newest 2025–2026 M3/M4 can't be unlocked yet. Mercedes, Audi, other brands and DMEs we have to send out — price on request.
The fuel you actually buy. A 93 map on 91 fuel isn't safe. Running ethanol blends like E40? That's a Custom Tune — we tune for your exact blend.
Yes. Your stock file is saved in your account and can be flashed back anytime.
No — buy online and flash with the dongle. Prefer in person? We can flash and log it at our shop, no dongle needed. Full repair service is coming soon.