no start

2008 BMW 328
126,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RMCCRAY
  • MEMBER
  • 3 POSTS
it will not start so i had battery tested and was bad so got new battery. installed battery and registered it but will not start. i did notice there is a plug not plugged in on battery. i do not see a place for it to plug in and when i took bad battery out I did not notice the plug until the new battery. I have researched the battery but nothing shows this plug. i have included picture to show you.
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Oct 16, 2017 at 2:15 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,128 POSTS
That looks like some kind of service connector and may not be used. Is the security light flashing when you try to start it?

Cheers, Ken
Oct 17, 2017 at 6:00 PM
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RMCCRAY
  • MEMBER
  • 3 POSTS
I can't get it to start before new battery or after new battery
Oct 18, 2017 at 8:04 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,128 POSTS
Okay, we need to check to see if it is an ignition or fuel related issue.

Here is a guide to help us see if the ignition system is working.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

We should also check the compression to make sure the engine is sound.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run this test and get back to us so we can keep helping you.

Cheers, Ken
Oct 19, 2017 at 11:21 AM