My Jetta is not a TDI....My car is dying when I come to a stop. It will start right back up. It also shows the battery warning light. Would this be the battery or alternator?

It is possible.

When at idle the RPMs drop as the engine slows. This results in the alternator slowing. If it is failing or you have a problem with the charging system it can cause the car to die.

Usually however with a charge failure it will not start back again easily.

Try checking under full load. Run all electrical systems radio, heater, lights etc at idle. If you see the lights start to fade and the engine dies it is likely the charging system.

Most likely the alternator or part of the regulating system.

You can have the alternator tested or you can do it yourself.

Connect at voltage tester to the terminals on the alternator. Run the engine and measure the output. It should read as per the indications on the alternator. There is a sticker on the alternator telling you the output.


Start there.

Hope this helped. Please rate if this helps you.