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D2 - Engine Bay Everything under the bonnet

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  #1  
Old 25th February 2018, 04:27 PM
Regulus Regulus is offline
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Default ECU problem

I received an e-mail from the Audi dealer on Friday.
They have changed the fuel pump, but it wasn't faulty.

Turns out it is the ECU: 4D0997557EX
Which was filled with water according to Audi. And they weren't able to locate a used unit in Sweden.

I haven't talked with them yet. As I arrived back home late last night. Was gone for two weeks working in Norway.

So what do I do now? I looked for the ECU on 8parts shop, but didn't find any.
Do you recommend I send it to
http://www.ecu-repairs.com/engine-ecu-repairs/audi ?

Oh! And does the ECU have to have an exact match in the last two letters?
I see https://trshop.audi.de/konakart/Quic...57EX&x=11&y=13 has other variations.
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  #2  
Old 25th February 2018, 04:33 PM
HPsauce HPsauce is offline
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Is that in the ECU box in the engine bay? Was that full of water too?
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2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one!
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e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!
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Old 25th February 2018, 04:48 PM
ainarssems ainarssems is offline
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Any part number with X at the end is exchange part from Audi meaning that you need to return old part to them. The correct part number for 32V S8 automatic is 4D0907557N. This should help you with the search or alternatively I do have spare unit if you are unable to find one elsewhere. The replacement unit will need to be paired to immobiliser unit in the car using VAS5054, VCDS or similar tool. It does need to be N at the end but physically all the letters should be the same, just different software for A8/S8 3.7/4.2 and manual/auto boxes.
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Last edited by ainarssems; 25th February 2018 at 04:58 PM.
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Old 25th February 2018, 04:55 PM
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Two in Germany and one in France when using part number 4D0907557N on eBay. All pre-owned and around the £150 mark.
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Old 25th February 2018, 05:07 PM
Regulus Regulus is offline
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Quote:
Originally Posted by HPsauce View Post
Is that in the ECU box in the engine bay? Was that full of water too?
It is the Engine Control Unit. I do not know about the engine bay. Because I had the car hauled back to Audi as soon as it stopped running.

See thread http://forum.a8parts.co.uk/showthread.php?t=13800

edit:
Thank you for the info ainarssems. I will go to the Audi dealer tomorrow and learn more (and how much they will charge me for doing a job that was unnecessary from the start)
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A8 32V engine
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Last edited by Regulus; 25th February 2018 at 05:11 PM.
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  #6  
Old 25th February 2018, 05:56 PM
HPsauce HPsauce is offline
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The engine ECU is definitely in the box under the bonnet, base of the windscreen.
It is rather prone to filling with water if its seals are poor.
Not sure what sequence (what's on top etc.) the various ECUs are in a LHD car though, but for sure it should all be dry so it all need checking.

You "may" be lucky just drying everything out properly....

(I've got a facelift 40V engine for which the ECU is 4D0 907 559 AA)
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one!
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!

Last edited by HPsauce; 25th February 2018 at 05:59 PM.
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  #7  
Old 1st March 2018, 07:55 PM
Regulus Regulus is offline
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An update.
ODB Tuning in Karlstad did repairs on the ECU.
They told me there were no traces of water in it. Weird as Audi had claimed it was damaged by water
There were however damage to the contact. See the top on the middle contact. Plus it was cracked in the lower part, which they have tried to glue.
And there was one pin missing in the 4th contact from the left. The second row pin 2 was missing (again counting from the left).
They also replaced a gasket.
1500 SEK.

I love these guys They repaired the Driver Information Display and coded my new keys to the car.

ECU dropped off at Audi before closing hours
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A8 32V engine
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  #8  
Old 1st March 2018, 10:32 PM
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Architex_mA8tey Architex_mA8tey is offline
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Well done! Progress is good, hope it resolves things
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