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D4 - Common Faults Quick links to all known common faults and their solutions |
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#11
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from the problems described by other a8 owners
apparently fluid is pushed down the wiring loom into certain connectors it can actually get that bad it ruins a whole heap of parts engine wiring loom ecu hvac system im going to get mine checked out shortly to ensure i have not got the start of a very expensive problem to sort i also think this needs to be taken up with audi u.k and with the dealerships im going to do my homework on this as it sounds pretty serious when i do check out my car ill photograph everything so as other owners can get an idea of whats involved |
#12
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the effected parts appear to be
Transmission Coolant Valve - N488 It looks like the part has already been revised once: 4H0121670A n509 would be great if someone with elsawin or the likes could put a few pictures up so as we knew what the possible problem could be if there are any a8 owners up or around south yorkshire and would like there car scanned for this potential problem please message me im literally 2 minutes from junction 36 of the m1 |
#13
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Keep us posted, it sounds like megabucks to sort if ignored.
It may only be an issue on early D4 models if they have revised the parts already. When I was looking at used D4's last year, I came across a 2012 one "in preparation" at a main dealer. It had the passenger seat removed, the carpet in the passenger footwell pulled back and lots of trim removed under the glovebox area. The Salesman mentioned it was waiting on some electrical parts as the aircon drains had blocked flooding the footwell ? I walked away obviously but I wonder now if it was this coolant/wiring issue. |
#14
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the D4's in the other threads appear to be in the main 2011/12 D4s on fairly low mileage as far as i can see. we are taliking about 3000 to 23000 miles.
one of the guys had a bill for 8K dollars, most of the others were on warranty, so we are looking at multiple modules, and of course putting in a new loom that will probably add a huge amount of hours to the bill.
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______________________________________________ A8 4.2TDI - Ice Silver, Comfort heated/cooled/massage Seats, Alcantara, Extended Leather pack, Ambient light pack, Solar roof, Night Vision, Lane change assist, Audi presense, Audi BrakeGuard, ACC Cruise, Blinds, Quad Air, AMI, Online services, Parking with rear Camera, Aluminium brushed inlays, Adaptive Zenons, High beam assist, Bose Sound, and more Gone but not forgotten: A8 D3 2005- AMI HDD, Audible Parking, TV, NAV, Bluetooth, Hybrid TV, Aftermarket headrest monitors, Rosstech VCDS / Vagcom |
#15
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Quote:
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#16
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Good Find. Is there a version available that covers the 3.0TDI engine ?
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#17
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Quote:
I suspect the 3.0 is omitted as the document was dated 2010 the D4 was launched with the 4.2TDi and 4.2FSI engines only? |
#18
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I've now moved all the D4 information files to Common Faults Sticky HERE now
There is a document on there specific to the 3.0 Tdi Engine
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs Last edited by Architex_mA8tey; 10th May 2016 at 10:30 AM. |
#19
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going to do the inspection on my vehicle this morning
i will try and get photos of the offending items so as its easy for other people to identify |
#20
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right guys
the offending article appears to be accessible by removing your **** guard under the car (be warned it has a lot of screws and fixings ) and carefully removing the plugs to see if they are wet at all one brown plug and one black one (one of which is difficult to access as its up against the intercooler ) https://www.flickr.com/photos/235252...posted-public/ may just be worth you keeping an eye on your own car |
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