mickhart

Help with ecu repair e39 m5

10 posts in this topic

I have an Emola Red E39 M5 and have owned it for 15 years.

Can anyone help me with a company that can repair Siemens ECU'S.

I have tried a few places and the have said they have not got the correct plug. 

M5 ECU.jpg

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The fact that no-one has come forward would suggest that perhaps this is a rare requirement, I've not come across it previously - other than hearing my Indy telling another customer the cost of a new ECU for a E46.... 

 

If you do find somewhere to do it would you mind posting who as it might help someone else in future...

 

Good luck :)

 

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What is the problem with the ecu? Never heard of one going on a e39 so just curious.

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See if you can get some fault codes.
If you have any for internal processor, then it is game over, and you'll probably need a replacement.

urquattro likes this

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Ecu doctor?

Sent from my SM-G900F using Tapatalk

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14 hours ago, robsey29 said:

What is the problem with the ecu? Never heard of one going on a e39 so just curious.

Check engine oil light comes on when I turn off the engine.

Oil temp gauge not working.

Water temp gauge gives false reading.

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10 hours ago, Mazi said:

Ecu doctor?

Sent from my SM-G900F using Tapatalk

Cheers Mazi.

I have just sent an email to Ecu Doctor with the details of my problem.

Will post his reply.

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On 18/03/2017 at 1:00 PM, mickhart said:

Check engine oil light comes on when I turn off the engine.

Oil temp gauge not working.

Water temp gauge gives false reading.

 

These are the reasons why you feel that your ECU is faulty ??

 

I highly doubt its your ECU that's faulty.

 

Engine oil level / temp sensor is at the bottom of your oil pan.

 

Water temp sensor is on your Thermostat.  Its a dual sensor, one signal for the instrument cluster temp gauge and one signal to the ECU for the fuelling data set.

 

But it also used to give an oil temp indication to the instrument cluster gauge, if the engine oil level sensor is faulty.  If I remember correctly.

 

When this sensor connector is dirty or loose you see strange water temp and oil temp readings (if the oil level sensor is faulty at the same time).  Remove the connector and check out the connection quality.  Also its very easy and cheap to replace this important sensor.

 

The engine oil level sensor is also known for failing at some point, and will eternally suggest you have low engine oil when you switch off the engine.

 

What fault codes is your car showing ?

 

 

Edited by M5 London
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