warning lights

RonnieJ · 05-21-2019, 06:36 PM

Hello all, I have a 2003 Z4 2.5 which I bought a month past. Today when I was driving the Brake warning light came on then the DSC light and the Air Bag warning light. When I bought it I noticed the rear brake pads had been changed but not the front and I was getting a chirping sound from them today. Could the front pads cause all of these to come on?

Clearancediver · 05-22-2019, 08:45 PM

Google Z4 trifecta....lots of info regarding these lights/issue....

Check your alternator voltage output...battery voltage in the morning before starting. Low voltage is a no no for these cars.

unluky · 05-23-2019, 04:45 PM

Quote:

Originally Posted by Clearancediver

Google Z4 trifecta....lots of info regarding these lights/issue....

Check your alternator voltage output...battery voltage in the morning before starting. Low voltage is a no no for these cars.

I'll 2nd this - just went through tracking this down this winter. Lights will keep getting worse and more of them. Finally tested the voltage at the battery and found out my Alternator and/or voltage regulator was out. Replaced them both and back to full strength again.

RonnieJ · 05-23-2019, 07:06 PM

Quote:

Originally Posted by unluky

I'll 2nd this - just went through tracking this down this winter. Lights will keep getting worse and more of them. Finally tested the voltage at the battery and found out my Alternator and/or voltage regulator was out. Replaced them both and back to full strength again.

Thank you both for your help.

05-21-2019, 06:36 PM	#1
RonnieJ New Member 6 Rep 15 Posts Drives: 2003 BMW Z4 Join Date: Apr 2019 Location: Sterling Heights MI iTrader: (0)	warning lights Hello all, I have a 2003 Z4 2.5 which I bought a month past. Today when I was driving the Brake warning light came on then the DSC light and the Air Bag warning light. When I bought it I noticed the rear brake pads had been changed but not the front and I was getting a chirping sound from them today. Could the front pads cause all of these to come on?
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05-22-2019, 08:45 PM	#2
Clearancediver Lieutenant 89 Rep 406 Posts Drives: 2004 Z4 Join Date: Oct 2012 Location: Victoria, BC Canada iTrader: (0)	Google Z4 trifecta....lots of info regarding these lights/issue.... Check your alternator voltage output...battery voltage in the morning before starting. Low voltage is a no no for these cars. __________________ Sent from my smart phone...
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