B13 Performance · OBD flashing suite

B13 Flasher — OBD tuning for VAG, done right.

Read, flash and log Simos 18 engine ECUs, DQ250 / DQ381 gearboxes and Haldex Gen5 couplings from a laptop over OBD. Your cars, your tunes and support — all in one account.

Download B13 Flasher Sign in Windows 10 / 11 · BLE and USB OBD adapters, J2534 interfaces
What it is

A flashing tool and an account that remembers every car.

B13 Flasher is the desktop app. flasher.b13.ltd is where purchases, vehicles, tunes and support live — for clients and for dealers.

Stage tunes and options

Pick a stage and the options it allows. Every file is built for the exact software version read from your car.

Stock is always there

Every supported stock version is kept in the B13 library. Returning to stock is free, any time, in the same app.

Files never leave the server

Tunes are built for one VIN and sent straight into the control unit. Nothing is written to disk and nothing can be re-used elsewhere.

Free updates

Buy a stage once. Its revisions for your car are free and show up in your account as soon as they are released.

Supported modules

Engine, gearbox and all-wheel drive.

One adapter, one app, three control units. Each module is read and flashed on its own.

Engine ECU

Simos 18

Simos 18.1, 18.10 and 18.4 on EA888 Gen3 engines — Golf 7 GTI / R, Audi S3 8V, Leon Cupra, Octavia RS and more.

  • Stage tunes per software version
  • Options per stage
  • Live data logging over OBD
Gearbox

DQ250 & DQ381 DSG

6-speed DQ250 and 7-speed DQ381 wet-clutch gearboxes, matched to the engine stage.

  • Shift logic and clutch torque limits
  • Sold separately or as a bundle
  • Gearbox data logging (HSL)
All-wheel drive

Haldex Gen5

Fifth-generation Haldex coupling on 4Motion / quattro / 4Drive cars.

  • Coupling behaviour tuning
  • Flashed on its own, over OBD
  • Coupling data logging
How it works

Four steps. The red one is the only one that writes.

01

Connect

Plug the adapter into the OBD port, open B13 Flasher and sign in with your account.

02

Read

The app reads your VIN and every module and checks battery voltage and ignition.

03

Choose stage

Pick a stage and options for your software — or let your dealer do it for you.

04

Flash

Preflight checks, then the write. A few minutes with progress on screen; the result is logged to your account.

Become a dealer

Tune your customers' cars with B13 files.

A dealer account holds a USD balance, your clients and their vehicles. Create client accounts, flash their cars and track every write from one place. Your clients see their cars and tunes — never your prices.

Download

B13 Flasher for Windows

64-bit and 32-bit builds · Windows 10 / 11. Requires a B13 account.

Adapters

BLE, USB and J2534

B13 Flasher works with BLE and USB ISO-TP bridges and with standard J2534 pass-thru interfaces.