Do not wait to be completely down, change your starter at the first sign of weakness! Generally, a tired starter does not spend the winter. In addition, if the engine runs but does not start, it is not necessarily a battery failure, starter or alternator. This may also be the result of another failure (ex ignition, generators, some electrical parts and fuel failure, etc.).. Denparts is here to help you keep your ride on the road. We specialize in brand new, OEM-spec aftermarket replacement parts for cars and trucks, and SUVs, both domestic and foreign. Browse our massive online inventory of automotive alternators, fuel pumps, starters, and other component parts and shop with full confidence at Denparts.