N54 MSD80 MSD81 ECU IRF644 MOSFET
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Replacement MOSFET for N54 MSD80 or MSD81 DME. This part frequently fails resulting in 30BA and 30BB fault codes that cause misfiring and rough engine operation. Using this part and one of the many DIY videos you can repair your ECU. Note priced individually. If doing a full upgrade you'll need six of these.