[bhmax16]

I was excited to take the M4 to work today given that it has sat for a few days. I fired it up and was greeted with 4 errors, including a rear diff lock warning, chassis stabilization, front collision warning and pedestrian warning systems restricted/deactivated.

I was going to take it to work anyway, but it would not allow me to select either of my M1/M2 drive mode settings and I figured it best I leave it home due to the differential warning in particular, so I took my Mazda SUV.

I started the M4 back up after getting home from work to satisfy my curiosity and all the errors were gone! I took it for a 40 minute blast down some back roads and it didn't have a single hiccup.

Intermittent issues suck, but I'm happy everything cleared on its own and will monitor accordingly. Anybody here have a similar issue that eventually became more than an occasional nuisance? This reminds me that I need to pick up a new scan tool. My Bavarian Technic cable won't work with this generation.

[MJBO]

Weird stuff like this always make me first think of the battery. None of my BMWs have ever liked having a failing battery.

[bhmax16]

Originally Posted by MJBO

Weird stuff like this always make me first think of the battery. None of my BMWs have ever liked having a failing battery.

I agree, that was my experience with my '07 3 series. I didn't think low battery voltage would be likely since the car was driven just a few days ago but to your point it could be a failing battery altogether. The faults suddenly clearing on their own is a bit strange though since I did not charge it up or drive it and instead let it continue to sit all day until I got home.

I do have a lithium battery charger and tester so I'll give it a health check for good measure.

[Info@mad-us.com]

Originally Posted by bhmax16

I was excited to take the M4 to work today given that it has sat for a few days. I fired it up and was greeted with 4 errors, including a rear diff lock warning, chassis stabilization, front collision warning and pedestrian warning systems restricted/deactivated.

I was going to take it to work anyway, but it would not allow me to select either of my M1/M2 drive mode settings and I figured it best I leave it home due to the differential warning in particular, so I took my Mazda SUV.

I started the M4 back up after getting home from work to satisfy my curiosity and all the errors were gone! I took it for a 40 minute blast down some back roads and it didn't have a single hiccup.

Intermittent issues suck, but I'm happy everything cleared on its own and will monitor accordingly. Anybody here have a similar issue that eventually became more than an occasional nuisance? This reminds me that I need to pick up a new scan tool. My Bavarian Technic cable won't work with this generation.

My guess is the battery may be going bad.

Edit: just saw everyone above had the same guess

[tom @ eas]

Originally Posted by bhmax16

I agree, that was my experience with my '07 3 series. I didn't think low battery voltage would be likely since the car was driven just a few days ago but to your point it could be a failing battery altogether. The faults suddenly clearing on their own is a bit strange though since I did not charge it up or drive it and instead let it continue to sit all day until I got home.

I do have a lithium battery charger and tester so I'll give it a health check for good measure.

Was an OTA update performed? Those errors are typical to modules going offline, which will typicaly clear on an ignition cycle.

[MJBO]

Originally Posted by bhmax16

I agree, that was my experience with my '07 3 series. I didn't think low battery voltage would be likely since the car was driven just a few days ago but to your point it could be a failing battery altogether. The faults suddenly clearing on their own is a bit strange though since I did not charge it up or drive it and instead let it continue to sit all day until I got home.

I do have a lithium battery charger and tester so I'll give it a health check for good measure.

They just act odd when the battery is having issues. With my E90 M3, I was having increasingly intermittent issues with Comfort Access, to the point where it didn't function at all. Similar story with Auto Stop Start.

Replaced the battery, and the issues never returned!

If it does prove to be a similar issue for you, I'd expect BMW to rectify that under warranty considering the very young age of your M4.

[Anderson11]

Originally Posted by Info@mad-us.com

My guess is the battery may be going bad.

Edit: just saw everyone above had the same guess

How about instead of "guessing" scan it yourself or bring it to your dealer. Data driven diagnostics/decisions are best vs. guessing.

[Info@mad-us.com]

Originally Posted by Anderson11

How about instead of "guessing" scan it yourself or bring it to your dealer. Data driven diagnostics/decisions are best vs. guessing.

Not my car so guessing is all I can do from here . Battery is a still a great place to start.

[OGM1]

I've had four BMW's over the years. The newest being two weeks old. The last three have all thrown random codes that went away after an ignition power cycle. Not saying there's no issue, but don't panic just yet.

[bhmax16]

Originally Posted by tom @ eas

Was an OTA update performed? Those errors are typical to modules going offline, which will typicaly clear on an ignition cycle.

OTA update was performed over 2 weeks ago, so not likely related to that as it was driven multiple times since then.

I am performing a lithium battery test as we speak and will have results by morning. I'm monitoring state of charge over an additional 12-24 hours to ensure all is stable.

[DrinkMoreWater]

Dude you may want to check for rodent damage. I got some intermittent errors like this. Turned out to be some rodent damage to electrical wires.

[Blizzard]

Had that exact experience with a new 5-day-old M4 Comp. Coming out o my garage there was a deep decline and one wheel was off the ground That threw it into CHAOS!!!! same symptoms BUT after 30 min all is well

Scary but relieved......