Start tuning now! Get your Bosch MG1CS031, MG1CS146, MD1CS004, and MD1CS104 ECUs unlocked right here in the USA with our quick and convenient mail-in unlocking service with same-day turnaround. This unlock supports Bench with the AT Tool complete with full Bootloader+ASW+Calibration read on the 2.0T and 2.0 TDI Audi, Cupra, Ford, Man, Seat, Skoda, and Volkswagen Models!
✅ Your ECU is safe. It will not be opened or physically modified.
Unsure if your vehicle is supported? Search our guide!
We do not process opened ECUs. UPS will reject your shipment if it has any hazardous markings, words, numbers, or symbols. See shipping details here.
📦 Fast and secure shipping with UPS Next Day Air
Shipping, both ways, is calculated at checkout. We will email you a shipping label during normal business hours (M-F, 8-5 CT).
We support mail-in unlocks only. In-person service isn’t available at this time. If you send an AirTag, tape it to the ECU.
How does this work?
We make the entire process quick, simple, and straight forward.
Step 1
Buy the unlock from our website and we'll send you a next day air shipping label. Remove the ECU, package it, and drop it off at a UPS Access Point.
Step 2
The unlock process is quick and reliable and we do it in house in Auburn, Alabama, USA. We don't open the case or modify the board. It takes minutes.
Step 3
Usually less than 48-hours later, it's back in your hands. Reinstall and get down to tuning. Have fun!
FAQ
Here's what most people are asking.
At check out we'll calculate shipping, which includes shipping the ECU to us and back to you. We use UPS Next Day Air in the USA and UPS World Wide Saver for international orders. We get phenomenal rates and pass the savings to you.
Where is my shipping label?
You'll receive the shipping label in your email during our normal M-F, 8-5 Central business hours. It may take a moment to hit your inbox while we process orders each morning and evening. Make sure to check the junk or spam folder, just in case.
How do I package the ECU?
Securely package the ECU(s) in a small box no larger than 14" x 13" x 6" and use the label emailed to you. If you send an AirTag, make sure you tape it to the ECU so it doesn't get lost in the box.
⚠️ CRITICAL PACKAGING INFORMATION ⚠️
Do NOT reuse shipping boxes that display any hazardous material markings. UPS automatically scans packages for hazardous material indicators. Boxes with these markings may be rejected, returned, or DESTROYED by the carrier. Do NOT use boxes with: Hazard diamond labels, Lithium battery labels, UN numbers (UN####), Limited Quantity or Dangerous Goods labels, or Words such as: acid, aerosol, alcohol, battery, biohazard, butane, chemical, combustible, compressed, controlled substance, corrosive, dangerous, diesel, drug or drug name, explosive, ethanol, fire, flammable, fluid, fuel, gas, gasoline, hazardous, hazardous material, hazmat, infectious, limited quantity, limited qty, lithium, li-ion, li-metal, LQ, medical, medicine or medicine name, needles, oil, organic, ORM-D, oxidizer, paint, peroxide, pesticide, poison, poisonous, pressurized, propane, radioactive, solvent, thinner, toxic, warning, or anything similar in any language.
Always use a plain cardboard box with no hazardous labels or markings, roughly 14" × 13" × 6" in size.
Where do I take it?
Then take the package to any UPS access point.
What if I don't have a printer or a box?
If you don't have a printer or a box, many UPS access points can handle all of this for you.
Where does it ship to?
All ECUs are sent directly to our U.S. headquarters:
AutoTuner USA
851 Stage Rd
Auburn, Al 36830
USA
Important: Some vehicles use two ECUs. If your vehicle has a dual-ECU setup, you’ll need to purchase an unlock service for each unit.
Want to speak to a human? We're a fully staffed, U.S.-based operation located in Auburn, Alabama. When you send us your ECU, it’s going directly to our team, and nowhere else, and not to an unknown location or an unlisted service. You can reach us easily, and you’re always welcome to contact us in whatever way works best for you.
Here’s how to get in touch:
Mailing Address
851 Stage Road, Auburn, Alabama 36830
Live Chat
Use the chat window on our site
Social Media
Find us as @AutoTunerUSA on nearly every platform. Just look for our logo!
Each ECU is different, so always refer to our guide for supported methods.
For unlocks that support Bench, the AutoTuner Tool is guaranteed to be compatible.
For unlocks that support OBD, the AutoTuner Tool is guaranteed to be compatible. We can't guarantee all tools will be compatible, but we don't lock anyone out.
We're doing the unlock in house at our headquarters in the USA. Typically they are shipped back the same day we receive them. We process ECUs during normal business hours: M-F, 8-5 Central. We ship UPS Next Day Air in the USA, or UPS World Wide Express internationally.
Nope!
We need to protect the unlock method. Once it's known the unlock can get patched by the manufacturer and then everyone's locked out again. Secondarily, since this unlock method isn't really known, we have to take steps to protect the work.