{"product_id":"bmw-n54-msd80-dme-mosfet-replacement-service","title":"BMW N54 MSD80 DME MOSFET Replacement Service","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eBMW N54 MSD80 DME MOSFET Replacement Service\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis is a \u003cb\u003email-in MOSFET replacement service\u003c\/b\u003e for BMW vehicles equipped with the Siemens MSD80 DME and N54 engine.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThe MSD80 is known for failure of the MOSFETs used in the injector driver circuits. Failed MOSFETs can cause DME internal fault codes, cylinder misfires, rough running, loss of power, or cylinders that are not firing.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFor this service, you send us your original MSD80 DME and we replace \u003cb\u003eall six injector-driver MOSFETs with upgraded replacement components\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCOMMON FAULT CODES\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eMOSFET failure in the MSD80 is commonly associated with:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e30BA\u003c\/b\u003e – DME Digital Motor Electronics, internal failure\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e30BB\u003c\/b\u003e – DME Digital Motor Electronics, internal failure\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29CD\u003c\/b\u003e – Cylinder 1 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29CE\u003c\/b\u003e – Cylinder 2 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29CF\u003c\/b\u003e – Cylinder 3 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29D0\u003c\/b\u003e – Cylinder 4 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29D1\u003c\/b\u003e – Cylinder 5 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29D2\u003c\/b\u003e – Cylinder 6 misfire\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l3 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cb\u003e29CC\u003c\/b\u003e – Misfire, multiple cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eMisfire codes alone do not confirm a MOSFET failure. Misfires may also be caused by injectors, ignition coils, spark plugs, fuel system problems, wiring, mechanical issues, or other DME faults.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eWHAT THIS SERVICE INCLUDES\u003c\/b\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eReplacement of all \u003cb\u003e6 injector-driver MOSFETs\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eUpgraded replacement MOSFETs\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eInspection of the replaced components and solder connections\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eReturn of your original DME\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eThis is a \u003cb\u003eMOSFET replacement service, not a diagnostic service\u003c\/b\u003e. We replace all six injector-driver MOSFETs as requested regardless of whether an individual MOSFET has been confirmed failed.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eBecause your original DME is being serviced, \u003cb\u003eno cloning, VIN programming, immobilizer programming, or coding is normally required\u003c\/b\u003e. Your existing vehicle-specific data remains in the DME.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eIMPORTANT — PLEASE READ\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis service replaces the six injector-driver MOSFETs in your MSD80 DME. \u003cb\u003eMOSFET replacement is not guaranteed to correct your vehicle's symptoms if the underlying problem is caused by another component or system.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eBefore ordering, we recommend properly diagnosing the vehicle and confirming that the symptoms are consistent with an MSD80 MOSFET-related failure.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMSD80 ONLY\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis service is specifically for the \u003cb\u003eSiemens MSD80 DME\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eThis service is not for MSD81.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003ePlease verify that your DME is labeled MSD80 before ordering. If you are unsure, contact us with a clear photo of the DME label before purchasing.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eCOMPATIBLE BMW VEHICLES\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eMSD80 DMEs are found in select BMW vehicles equipped with the N54 engine, including:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo3; tab-stops: list .5in;\"\u003eBMW 135i – E82 \/ E88\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo3; tab-stops: list .5in;\"\u003eBMW 335i \/ 335xi – E90 \/ E91 \/ E92 \/ E93\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo3; tab-stops: list .5in;\"\u003eBMW 535i \/ 535xi – E60 \/ E61\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo3; tab-stops: list .5in;\"\u003eBMW X6 xDrive35i – E71\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l0 level1 lfo3; tab-stops: list .5in;\"\u003eBMW Z4 sDrive35i – E89\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eVehicle model or year alone does not guarantee that the vehicle uses an MSD80. \u003cb\u003eVerify the DME label before ordering.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eTHIS SERVICE DOES NOT INCLUDE\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis listing is specifically for replacement of the six MSD80 injector-driver MOSFETs.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eIt does not include diagnosis or repair of:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eWater or corrosion damage\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003ePhysically damaged circuit boards\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eFailed processors or memory devices\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003ePower supply or communication faults\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eFuel injector problems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eIgnition coils or spark plugs\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eFuel system problems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eVehicle wiring\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eMechanical engine problems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l1 level1 lfo4; tab-stops: list .5in;\"\u003eOther unrelated DME faults\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eIf the MOSFETs are not the cause of your vehicle's problem, replacing them may not correct the symptoms.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eMAIL-IN SERVICE\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eThis listing does not include a DME.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eYou must send your original MSD80 DME to us for MOSFET replacement.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eAfter the service is completed, your original DME will be returned to you with all six injector-driver MOSFETs replaced.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\n\u003c!-- Hidden Copyright Protection - Do Not Remove --\u003e\n\u003cdiv style=\"display: none !important; visibility: hidden !important; opacity: 0 !important; position: absolute !important; left: -9999px !important; height: 0 !important; width: 0 !important; overflow: hidden !important;\"\u003e© 2026 Velectronix. All Rights Reserved.\u003cbr\u003eThis product description is original content.\u003cbr\u003eUnauthorized copying, scraping, or reproduction is prohibited.\u003cbr\u003eProtection ID: VELECTRONIX-ORIGINAL-CONTENT-2026-V1\u003c\/div\u003e","brand":"Velectronix","offers":[{"title":"Default Title","offer_id":52488907358428,"sku":null,"price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0650\/5031\/2924\/files\/bmw-n54-msd80-dme-mosfet-replacement-service.webp?v=1789052873","url":"https:\/\/velectronix.com\/products\/bmw-n54-msd80-dme-mosfet-replacement-service","provider":"Velectronix","version":"1.0","type":"link"}