10-22-2021, 06:46 PM | #1 |
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2014 435i warm starting issues
So lately I've noticed my car is having an issue starting after driving it for about 15-25 min, then turning it off and let's say going into a store for about 15 min.
When I come back out and start the car, the dash lights flash, and it attempts to start and will either not start or start slowly. If it doesn't start I'll push the button again and it will struggle to start. When it does start the lights come on normal, but gauges stay all the way to left as if the car is off and then a couple of seconds later they go back to normal. I had a feeling it's the battery, so I charged it overnight about week ago...no change. The weirdest thing is that this only happens when the car is warm, doesn't happen first thing in the morning or after work. Should I just go ahead and get a new battery? Any other ideas?
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10-22-2021, 06:49 PM | #2 | |
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may not be the be it at all though
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10-23-2021, 11:13 AM | #4 |
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well.. what software would you use to code the new battery? it should tell you the life as well.
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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10-26-2021, 01:56 PM | #6 |
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Just an update, my battery reads 72% on bimmerlink. I'm just going to get a new battery this weekend. Looks to be the original in the car anyway.
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10-26-2021, 02:36 PM | #8 |
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10-26-2021, 02:55 PM | #9 | |
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Have you tried turning on auto start stop to see what happens? |
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10-26-2021, 02:58 PM | #10 |
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I'll try logging the voltage on start up. When the issue occurs, yes it does turn over slowly.
I'll also try turning on auto start/stop today on my way home from work. |
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11-17-2021, 11:31 AM | #11 |
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Im having the same issue as well on 2014 F30 335i w/ ~80k miles. Drive to store, grab something and super sluggish upon start up. A static battery test at autozone showed healthy battery- although battery appears to be original from date of mfg. Cold starts are fine.
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11-17-2021, 11:53 AM | #12 |
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Sounds like your starter is failing after a hot soak. It's a common way for a DC brushed motor to fail when exposed to high heat.
After starter replacement of a 14+ ( may also be below 14), there is a function in ISTA and other scanners to reset the stop start count. While not imperative to do, it could cause stop start to not function as it gets closer to it's end of life. Similar to an oil change reminder that isn't reset at the oil change, and comes on 500 miles later. |
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12-02-2021, 07:36 AM | #14 |
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Just curious, were you able to just replace the battery or did you have to goes through this coding process?
Getting close to replacing battery, trying to stay ahead of the game. Thanks! |
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12-02-2021, 08:21 AM | #15 |
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I registered the new battery using the full Bimmerlink app ($41) and I already had a Bluetooth adapter.
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11-16-2022, 10:55 AM | #16 | |
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Mine also 420xd b47 start perfectly after night in cold, from 2 rotation (one press) perfect start But if I race abit, and park for 2 min I can’t start. It spins once or twice and can’t then pauses sort of. Scary to live like that. |
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