N55 · B58 · S58 · N54 · S63 · call for a quote
BMW X3, X4, X5, X6 and X7 tuning
The 35i and 40i six-cylinders, the X3 and X4 M40i, and the X3 M, X4 M, X5 M and X6 M — custom MHD tunes for BMW’s SUVs.
Priced per car on a call · in our Corona shop or remote anywhere in the US
Every BMW X model shares an engine with a car: the N54 and N55 in the 35i models, the B58 in the M40i and 40i models, the S58 in the X3 M and X4 M, and the S63 V8 in the X5 M and X6 M. All of those are MHD platforms.
Almost every X model is xDrive, so these are tuned remotely: you log on MHD, we write and revise the calibration from the data.
On our dyno in Corona
Bolted to a Mainline ProHub hub dyno — no tires, no straps — and calibrated against measured power, with the conditions on the sheet. Our hub dyno runs rear-wheel-drive cars. xDrive (all-wheel-drive) BMWs are tuned remotely on MHD, from your logs.
Remote, anywhere in the US
- In MHD, screenshot the DME’s bin number, software version and readiness page, and save the stock .bin file MHD reads from the car.
- Send them to us with what is fitted and the fuel you run. We write the calibration for that car.
- Flash it with MHD. You log, we read the logs and revise until it is right.
What we tune
Models, engines and unlocks
Every car here runs an engine MHD supports. What changes from car to car is what has to happen before the first flash.
| Model | Chassis | Years (US) | Engine | Before the first flash |
|---|---|---|---|---|
| X1 35ixDrive | E84 | 2013–2015 | N55 | Flashes over the OBD port |
| X3 35ixDrive | F25 | 2011–2017 | N55 | May need a bench unlock, depending on software |
| X3 M40ixDrive | G01 | 2018–2024 | B58 | May need a bench unlock, depending on softwareCars built after 06/2020 need a special unlock |
| X4 35i / M40ixDrive | F26 | 2015–2018 | N55 | May need a bench unlock, depending on software |
| X4 M40ixDrive | G02 | 2019– | B58 | May need a bench unlock, depending on softwareCars built after 06/2020 need a special unlock |
| X3 M / X4 M / CompetitionxDrive | F97 / F98 | 2020– | S58 | Needs a FEMTO or AutoTuner unlock (DME removed) |
| X5 35ixDrive | E70 / F15 | 2011–2018 | N55 | May need a bench unlock, depending on software |
| X6 35ixDrive | E71 / F16 | 2008–2019 | N54 / N55 | May need a bench unlock, depending on software |
| X5 40i / X6 40i / X7 40ixDrive | G05 / G06 / G07 | 2019– | B58 | May need a bench unlock, depending on softwareCars built after 06/2020 need a special unlock |
| X5 M / X6 MxDrive | F85 / F86 | 2015–2019 | S63 | Check with MHD’s Unlock Check |
| X5 M / X6 M / CompetitionxDrive | F95 / F96 | 2020– | S63 | Needs a FEMTO or AutoTuner unlock (DME removed) |
Unlock requirements are MHD’s, and they follow when the DME was built, not the model year. MHD’s app has a free Unlock Check that tells you exactly what your car needs.
Before you buy
Questions people ask
- Can you tune an X3 M or X5 M?
- Yes. The X3 M and X4 M run the S58 and the X5 M and X6 M run the S63 — both MHD platforms. They are xDrive, so they are tuned remotely from logs, and later cars need a FEMTO or AutoTuner unlock first.
- Can you tune an X5 40i or X7 40i?
- Yes — the 40i models run the B58. A car built after 06/2020 needs a FEMTO or AutoTuner unlock first, and MHD’s Unlock Check tells you before you spend anything.
- Why is my X model tuned remotely?
- Our hub dyno runs rear-wheel-drive cars. xDrive (all-wheel-drive) BMWs are tuned remotely on MHD, from your logs. Remote does not mean generic: the file is written for your car and revised from your logs.
- How much does a BMW X tune cost?
- It is quoted on a call while we finish publishing BMW prices. The figure depends on the engine, what is fitted, the fuel, how many maps you want, and whether the DME needs an unlock first. Call or send the quote form and you get one number before anything is booked.
- Do I need an MHD licence for a custom BMW X tune?
- Yes. MHD licences are bought per car and held on your MHD account, and a custom tune needs at least the MHD Flasher licence — the map packs are optional. You also need MHD’s wireless adapter. If you do not have either yet, tell us on the call.
- Will a tuned BMW X pass a California smog check?
- No. Since July 2020 California Smog Check reads the engine software’s calibration ID, and software that is neither BMW’s nor covered by a CARB Executive Order fails. A custom tune is for off-road and competition use, and we will say so before you buy, not after.
Call for a quote
Get a price for your car
BMW prices are quoted per car: engine, parts, fuel, how many maps, and whether the DME needs an unlock first. The fastest way is a call; the form reaches the same calibrators.
(951) 405-4465Mon–Fri 9:00am–6:00pm
A tuned BMW will not pass a California smog check, and adding power costs longevity and economy. We say so before you buy. Emissions disclaimer