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benny1975

serious E61 electrical problems pls help

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I am having some serious electrical issues with my E61. Every dy now i am getting loads of bongs and warnings as i am going along the motorway, such as servotronic failure, transmission failure, braking and control systems failure, ABS,  and the I drive turning off intermittently, and issues with the power steering and level control fault, and check battery terminals.. If u stop the car, and turn it on and off some of the faults will go away. Leave it for about 15 miles then they all go away... but next day same old shit they are all back.This is really annoying can anyone let me know what they think this is??  I have heard of water ingress problems but my boot seems to be dry and I don't have a sunroof, pls help!

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I have only had this particular issue once and it was closely followed by the failure of the vibration damper! I'm guessing the 'looseness' of the damper causes the drive belt to slip or whatever, which gave rise to the dash lighting up like a Christmas tree!

This may be something entirely different of course, but may be worth a check.

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Have your battery checked!

 

There has been cases when the battery is on its way out people have been getting all different funny warnings coming up.

Edited by mravant

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When I had all those random errors it was caused by the Battery.

It isn't just a case of charging to the correct voltage, the problem is the battery capacity dwindles over time.

Here is mine prior to replacement after a full charge

 

batteryhistory_zpsf85bf648.jpg

 

You will note the capacity is not even reaching 50% when fully charged.

After I swapped it out (and registered the new one) I had no more errors.

 

A quick point about water in the boot of an E61, are you sure you have gone right down to the metal in the boot and not just under the spare wheel?

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can i buy a battery and fit it myself?  as i have heard stories that u have to program them to cars 1st?

Use DIS to determine what battery the car thinks is fitted. Sometimes problems occur because someone changes the battery for a different type or size and doesn't update the car to let it know. Perhaps a previous owner has done this?

Horsey

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Sorry to be thick but what is DIS and how do I do it?

So if I was to get the same make and type of battery that would be fine. But if I had to get a different one can I program it myself or do I have to go to a BMW specialist?

Thanks for all your advice

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Well my friend and I have pulled the boot of the car apart and dropped out the wheel well to bare metal. The wiring in there is all bone dry and no water leaks and no ingress on any of the wiring or the battery.

So I will now get the battery tested and hopefully it's that

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Sorry to be thick but what is DIS and how do I do it?

So if I was to get the same make and type of battery that would be fine. But if I had to get a different one can I program it myself or do I have to go to a BMW specialist?

Thanks for all your advice

DIS is a diagnostic and coding program which BMW use. Jimmy on the forum sells it. You need to register the battery even if you replace like for like and have to reset IBS, if you change to different size then more is required. Search my username and battery. I have a post before which explains the steps somewhere.

Horsey

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You can test that fault using the alternator voltage output value in the secret menu. Should be steady at 14.4 when running but if spiking higher then the regulator is needing replaced

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