Leib BMW G Series CAN BUS Pro 1 Valve (G42/G20/G22 etc)-R44 Performance
Leib BMW G Series CAN BUS Pro 1 Valve (G42/G20/G22 etc)-R44 Performance

Leib BMW G Series CAN BUS Pro 1 Valve (G42/G20/G22 etc)

Sale price£519.99GBP

Tax included. Shipping calculated at checkout



  • If you place an order with both in stock and back order or out of stock products, it will not be dispatched until all products are available to ship together.
  • Contact our sales team here for accurate lead times if you urgently need this product or would like it fitted to your vehicle at our North London based workshop.
  • Shipping time estimates at checkout are based on average courier delivery times and dont include time to despatch from our warehouse in some cases, for example when a product is on back order.

Leib Engineering CAN BUS Pro Exhaust Flap Valve Controller for the BMW G Series allows you to take control of your vehicle's exhaust system. Gain control over the exhaust valves and start/stop system.

Plug & play installation takes approximately 120 minutes without the need for cutting or soldering.

Main functions:

  • EXHAUST VALVE FLAP CONTROL | Adjustable in modes: open - series - closed
  • START STOP OFF | The engine start-stop function can be deactivated (can be set in the menu)

User information:

  • EXHAUST VALVE FLAP CONTROL | Controlled via rocker on the multifunction steering wheel
  • RES Button on the multi-function steering wheel pressed shortly, stores the valve flap mode for the next engine start
  • Optical confirmation of the selected valve flap mode by flashing the turn signal - only at the instrument cluster (not visible outside)
  • All functions can be adjusted in the menu (instrument cluster) if required (please download the functional description online)

Important information:

  • There will be NO error entry by using the LEIB CAN EXHAUST module
  • The LEIB CAN EXHAUST module is automatically DISABLED, if a BMW Tester is connected to the car
  • To prevent a double function, the functions of the exhaust valve flap control are only operable if the cruise control and the limit function are off


All BMW G Series models with a twin-valve exhaust setup.

This includes:

- BMW G42 M240i
- BMW G20 M340i
- BMW G21 M340i
- BMW G22 M440i
- BMW G23 M440i
- BMW F40 M135i xDrive
- BMW F44 M235i xDrive

& more

If you're not sure whether this part fits your vehicle, please get in touch.