Z4M

Yo_Adrian · 02-10-2022, 01:39 PM

I am stumped on this electrical issue. I have s 2007 Z4MR. Put it on a NOCO GENIUS5 automatic smart charger overnight since the car was sitting for awhile. Drove the car a short distance and parked it for a week. Went to drive the car today and there is no power at all. I tried jumping the car and still no power with the cables connected. Is there a main fuse that could be shot and preventing the car from receiving power from the jumper cables? I connected the jumper cables to the batter terminals and the terminal behind the engine.

The other issue is the lock to manually open the trunk does not work.

tomjonesBT33 · 02-11-2022, 04:28 PM

In the e85, the trunk will not open without power to the lock. So if the battery is dead, key won't work.

Ask me how I know.

Yo_Adrian · 02-18-2022, 09:29 AM

SOLVED - So I didn't realize how sensitive these cars are to jumper cables. It's wild how the car will not receive any power with cables connected. I was able to fish through the back and pull the emergency release cable to open the trunk (fortunately, I removed and never replaced the black tray years ago when replacing the top motor), pulled the battery and charged it overnight making sure the AGM setting was selected. Put the battery back the next day and the car was back to normal. My error was that I didn't select AGM on the charger and therefore the battery was not charged.

elerner61 · 02-22-2022, 04:19 PM

Quote:

Originally Posted by tomjonesBT33

In the e85, the trunk will not open without power to the lock. So if the battery is dead, key won't work.

Ask me how I know.

Surprised by this, sticking the hard key in the keyhole on the trunk lid and giving it a twist seems like it should work...that feels like a 100% physical mechanism. Are you saying with insufficient power to the car there is some type of lockout that prevents you from using the key?

gwbw · 03-20-2022, 02:29 PM

The key to the trunk is a pretty mechanical thing. No electrical at all. I open my trunk to reconnect the battery in the spring. No problem

Yo_Adrian · 04-12-2022, 03:01 PM

Unfortunately, my truck key lock mechanism is broken. That's why I had to go fishing.

02-10-2022, 01:39 PM	#1
Yo_Adrian Registered 2 Rep 3 Posts Drives: 2007 Z4M Join Date: Feb 2022 Location: Philly iTrader: (0) Garage List 1988 BMW 535is [0.00] 2007 BMW Z4M [0.00]	Z4M - No Power I am stumped on this electrical issue. I have s 2007 Z4MR. Put it on a NOCO GENIUS5 automatic smart charger overnight since the car was sitting for awhile. Drove the car a short distance and parked it for a week. Went to drive the car today and there is no power at all. I tried jumping the car and still no power with the cables connected. Is there a main fuse that could be shot and preventing the car from receiving power from the jumper cables? I connected the jumper cables to the batter terminals and the terminal behind the engine. The other issue is the lock to manually open the trunk does not work.
	Appreciate 0 Tweet Quote

02-11-2022, 04:28 PM	#2
tomjonesBT33 Second Lieutenant 177 Rep 266 Posts Drives: 2006 Z4 M Roadster Join Date: Oct 2019 Location: VA iTrader: (0) Garage List 2012 BMW X5M [0.00] 2006 BMW Z4 M Roadster [0.00]	In the e85, the trunk will not open without power to the lock. So if the battery is dead, key won't work. Ask me how I know. __________________ 2006 Z4 M Roadster - Silver Grey Metallic 2011 X3 xDrive28i - Deep Sea Blue Metallic 2012 X5 M - Monte Carlo Blue Metallic 2017 X1 xDrive28i - Alpine White
	Appreciate 0 Quote

02-18-2022, 09:29 AM	#3
Yo_Adrian Registered 2 Rep 3 Posts Drives: 2007 Z4M Join Date: Feb 2022 Location: Philly iTrader: (0) Garage List 1988 BMW 535is [0.00] 2007 BMW Z4M [0.00]	SOLVED - So I didn't realize how sensitive these cars are to jumper cables. It's wild how the car will not receive any power with cables connected. I was able to fish through the back and pull the emergency release cable to open the trunk (fortunately, I removed and never replaced the black tray years ago when replacing the top motor), pulled the battery and charged it overnight making sure the AGM setting was selected. Put the battery back the next day and the car was back to normal. My error was that I didn't select AGM on the charger and therefore the battery was not charged.
	Appreciate 1 wdb4718.00 Quote

03-20-2022, 02:29 PM	#5
gwbw Registered 0 Rep 3 Posts Drives: 2006 Z4MR Join Date: Jul 2017 Location: Saskatoon iTrader: (0)	The key to the trunk is a pretty mechanical thing. No electrical at all. I open my trunk to reconnect the battery in the spring. No problem
	Appreciate 0 Quote

04-12-2022, 03:01 PM	#6
Yo_Adrian Registered 2 Rep 3 Posts Drives: 2007 Z4M Join Date: Feb 2022 Location: Philly iTrader: (0) Garage List 1988 BMW 535is [0.00] 2007 BMW Z4M [0.00]	Unfortunately, my truck key lock mechanism is broken. That's why I had to go fishing.
	Appreciate 0 Quote