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E36 /7 Z3 (1996-2002)
E36/7 Z3 roadster and coupe talk with our gurus here.

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  #1  
Old 02-07-2012, 07:58 AM
mikebmwz3 mikebmwz3 is offline
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Location: Portsmouth
 
Join Date: Feb 2012
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Mein Auto: Z3,Mazda6
Question Mike Z3

Hi Can anyone help with the following Z3 3ltr Roadster problem?: Having stored the car over winter with little use the battery ultimately goes flat- OK a new battery purchased and engine starts all OK and I then slowly move in reverse away from garage and let car idle but then notice that both Traction control warning (red triangle) light and Brake fluid level warning light are both on.
The brake fluid level is fine, traction control switch when operated does not show its "on" light working. The car drives all OK and I have done around 70 miles since problem and lights still on. A quick trip to garage to find diagnostic codes and we have SE 30 Transfer acceleration sensor and SE 38-rotation rate sensor.
Any ideas what is wrong before delving deeper into repairs?
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  #2  
Old 02-08-2012, 07:55 PM
Cityconstable Cityconstable is offline
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Location: Boston ma.
 
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Mein Auto: 1997 z3 2.8
Personally I would just clear the codes and see if they come back. Rotational sensor sounds like the wheel speed sensor, those wires get brittle and short but easy to replace. A dead battery can cause bad codes so I'd see if they are real first. Good luck
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  #3  
Old 02-09-2012, 12:45 AM
mikebmwz3 mikebmwz3 is offline
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Location: Portsmouth
 
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Mein Auto: Z3,Mazda6
Hi - and thanks for your reply much appreciated. I had heard that a dead battery can cause warning lights to trip - that was what I was hoping had happened but I should have also said that the codes cannot be cleared/reset so I will check out sensor wires as you suggest. Cheers Mike
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Old 02-09-2012, 03:05 AM
Mikey48 Mikey48 is offline
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Mein Auto: BMW Z4 3.0
I agree with Cityconstable. Good luck.
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  #5  
Old 02-09-2012, 09:55 AM
ghpup ghpup is offline
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Mein Auto: 07 X3si, 00 528, 00 MZ3
Quote:
Originally Posted by Cityconstable View Post
Personally I would just clear the codes and see if they come back. Rotational sensor sounds like the wheel speed sensor, those wires get brittle and short but easy to replace. A dead battery can cause bad codes so I'd see if they are real first. Good luck
+1. I actually had these warning lights intermittantly for nearly 4 months before I finally took it in to the local indi BMW specialist. Having done some research, including this forum, I suspected the rear speed sensor. Sure enough it was. Not expensive and it took the shop less than an hour to complete.
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