N54 mosfet upgrade. This part comprises of 6 MOSFET transistors, with one for each injector to activate fuel injection. Our repair service uses upgraded MOSFET Transistors, which prevents the likely hood of this happening again. This is when you should upgrade your MSD80 to MSD81. All of these symptoms most likely mean that the MOSFET transistors located in your vehicle's injection computer module are faulty. Usually MOSFETs inside the DME fail on load. One of the most common failures of N54 powered BMWs is MSD80 (DME aka ECU). BMW N54 DME MSD80 E90 E92 E82 N54 335i 135i Upgrade Kit: MOSFET FDB 14N30 This BMW Siemens MSD80 DME (Digital Motor Electronics) unit used in many BMW vehicles from 2006 to 2013 years with N54 or N54T 6 cylinder turbo engine. Its replacement can consequently fix the faults associated with 30BA, 30BB codes etc. The updated version of the engine computer, MSD81 has no weak points and comes with stronger MOSFETs and PSUs. Using our repair kit, you can permanently repair the Siemens MSD80 / MSD81 injection computer yourself at a lower cost. Apr 9, 2021 ยท Product Description x Upgraded FUEL INJECTOR mosfet transistors to replace your old, prone to failure transistors in your MSD80 N54. . We replace all 6 Mosfets with our upgraded versions. YOU MUST REPLACE ALL 6. basically replacing MSD80 with MSD81. These will fix the problem! Even if you're tuned, These upgraded mosfets won't fail. Utilizing this part and a DIY video, ECU/DME repair is achievable. e. You only need to send us your DME module or CAS module with one of your keyfobs. We offer programming, aka matching MSD81 instead of MSD80 to your CAS module, i. ouwgf vhfa efob bqr hswqj qnpq jgffgzfna hszl elpob kdajjau