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Preventive maintenance just simply means following a strict maintenance schedule. Change all the fluids often. Oil and lube all moving parts. Perform 100,000 mile check ups every 50,000 miles. If you have the persistence and effort to do this the drivetain should be reliable over many years. For electronics you can't say the same. You just have to hope the electronics work years down the road. Don't abuse the electronics and make sure the wiring stays in good condition.
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