If your BMW or Supra was built after June 2020, the ECU is locked at the factory. No flash tuning is possible until it's unlocked. FEMTO is the only proven solution worldwide to remove this restriction and enable tuning through MHD, MHD+, Bootmod3, MG Flasher, or any other OBD-based platform. 

This isn't optional. If you want to tune a 2020+ vehicle, you need a FEMTO unlock first.

Why FEMTO Is Required

Starting in June 2020, BMW introduced an updated bootloader that blocks all OBD flash tuning. Traditional bench unlocks don't work on these ECUs. FEMTO is the only service that can remove the lock and restore full tuning access. Once unlocked, your DME works with any supported tuning platform, no additional unlocks needed.

How It Works

• Place your order and we send you a prepaid, fully insured shipping label to FEMTO (Finland or Miami) within 12-24 hours.
• Your DME ships directly to FEMTO via insured international express (1-3 days transit).
• FEMTO completes the unlock (24-48 hours).
• Your unlocked DME ships back to you (1-3 days return transit).

Total turnaround is approximately 4-8 days from start to finish.

What's Included

• Prepaid insured round-trip shipping (to and from FEMTO)
• FEMTO unlock service (non-invasive, OEM electronics retained)
• Full email support from CenCal Motorsport throughout the process

Compatible Tuning Platforms

• MHD Tuning
• MHD+ (S58 & B58 only)
• Bootmod3 (BM3)
• Bootmod3 CustomROM
• MG Flasher
• EcuTek

Supported Engines

• B46 / B48
• B58 (Gen 1 & Gen 2)
• S58
• N63 / S63
• S68

Fitment

• 2020+ BMW G80 M3 / G81 M3 Touring
• 2020+ BMW G82 M4 / G83 M4 Convertible
• 2023+ BMW G87 M2
• 2020+ BMW M340i / M440i (G20, G22, G23, G26)
• 2020+ BMW X3M / X4M (F97, F98)
• 2020+ BMW X5M / X6M (F95, F96)
• 2020+ BMW M5 / M8 (F90, F91, F92, F93)
• 2020+ BMW X5 M50i / X6 M50i / X7 M50i
• 2020+ BMW 540i / 740i / 840i
• 2020+ Toyota GR Supra (A90, A91)
• Other BMW and MINI models with 06/2020+ production date DMEs

Not sure if your vehicle needs a FEMTO unlock? Send us your VIN and we'll verify.

Dual DME Vehicles

Some models use two DMEs, including the M5, M8, X5M, X6M, and XM. If your vehicle has dual DMEs, you'll need to purchase two unlocks, one for each ECU.

Important Notes

• Non-refundable once ordered
• Professional DME removal and reinstallation required
• Tuning licenses (MHD, Bootmod3, etc.) are sold separately unless selected as an add-on
• Disable OTA updates after reinstalling your DME to prevent re-locking

Why CenCal

We handle everything. You get a prepaid insured label, direct coordination with FEMTO, tracking throughout the process, and real human support if you have questions. Your DME is fully insured and tracked the entire way.