How to Determine if the Starting Motor Is Bad?

Starting a car requires a starter motor, which consists of a DC electric motor, a transmission mechanism, and an electromagnetic switch. It converts the electrical energy stored in the battery into mechanical energy that drives the flywheel of the engine to start it. Here are some common symptoms of a faulty starter motor:

When there is a problem with the power supply of the starter motor, such as an open or short circuit inside the starter motor, the vehicle will not respond when you try to start it.

If some of the coils inside the starter motor are short-circuited, the transmission mechanism will not be able to generate enough rotating magnetic force to provide the required torque for starting the engine. This will cause the engine to make a dull sound and run at low speed.

If the magnetic coil of the starter motor fails, the starter motor will keep rotating but the flywheel will not be driven, resulting in no engine speed and a sound of the motor working. The vehicle cannot be started in this case.

When the bearings, carbon brushes, or starter gear of the starter motor are damaged, the starter motor will not be operable. You may hear a loud noise when you try to start the vehicle in this case.

In case of a short circuit within the starter motor, the starter wire or coil may overheat. You may smell a burnt odor when trying to start the vehicle.

Whether you need to replace or repair the starter motor depends on the severity and location of the damage. If there is a problem with the external circuitry of the motor, replacing the motor won't help, and repairing the circuitry is the key problem. In addition, whether to replace or repair also depends on the power of the starter motor. If the motor has high power, repairing it is definitely more cost-effective than replacement.

All parts produced by MAPMS are developed by a professional and experienced team, and manufactured in a factory that has obtained IATF16949 certification. All parts are tested by MAPMS's internal quality department using diagnostic equipment and external professional testing centers. Stable and reliable quality is the core of MAPMS's existence.

Currently, MAPMS has received wide acclaim globally and established strong cooperation with wholesalers. With excellent quality, a wide range of products, quick response times, short delivery times, extensive experience, and professionalism, it has quickly become a leader in the field. MAPMS will continuously update its product range. Please feel free to inquire.