|
D4 - Common Faults Quick links to all known common faults and their solutions |
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
I am bitterly disappointed with my new d4, after many years of blissful d3 ownership I purchased a 2012 lwb 3.0 tdi d4. I have the dreaded droning noise, it is appalling. I have had the car 3 weeks, and when I bought her, I knocked the price accordingly so had the budget to:
4 new Goodyear f1 265/49/20 tyres All four wheels checked, and powder coated Both front wheel bearings All fluids including gearbox and filter Professional 4 wheel alignment (to the mm) Nitrogen filled tyres New oem discs and ebc ultra max 2 pads (superb in the d3) Fresh brake fluid, system bled inc vcds bleed Car is transformed, but has serious front road noise/ drone, drives me insane! So bad that I am actually thinking of loosing money and moving it on. It’s not prop centre bearing as is it definitely front, I’m contemplating having 2 new driveshafts as have read that Audi have fitted these for people complaining about the same issue, that would be my last straw as I cannot stand it. I even put my old d3 wheels on that had awesome (silent) Avon Zzr 5 tyres on, it was exactly the same. Every time I ask someone, they say tyre noise, but it must be more than that surely. I’m shocked at how bad the car is compared to the d3, a serious regrettable purchase, sad times |
#12
|
||||
|
||||
Quote:
__________________
2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#13
|
||||
|
||||
Quote:
There don't appear to be that many D4 owners on here, so probably difficult to get a consensus from other owners. I know Neil drives a D4, as well as a D2 and D3, so he might be able to confirm whether or not he has any experience of the issue.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#14
|
||||
|
||||
Quote:
__________________
2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. |
#15
|
|||
|
|||
I have a 2011 D4 that was recently cured with a front left wheel bearing.
It took much deliberation by the garage to decide which wheel bearing was the culprit. Thankfully they picked the correct one. I had read the same info on propshaft etc. I had suggested same to the mechanic, they ran the car at road speeds up on the lift & numerous road tests to come to the decision on the wheel bearing. I’d suggest having another look at wheel bearings, could it be one of the rear ones or a faulty/poorly fitted on the front. Hope you sort it, it’s awful annoying. |
#16
|
|||
|
|||
Thank you mate, but you can’t fit the wheel bearings wrong. They just bolt on and torque up to required setting. It’s definitely front, I reduced front pressure from 37 to 31 which has helped a little, it seems the higher pressure amplified the drone, acting like a microphone. It is road surface dependant, which is bizarre, I opted for the Goodyear as every seems to say they are the quietest. I still have my d3 so I might try these wheels on that to totally eliminate it, but as I say I tried the d3 wheels on here and noise was the same. The D3 is silent and travels round like a magic carpet! I have a bmw m3 with race suspension and track tyres with ridiculous geometry and I think it drives quieter than the d4......I’m going to change fluid in front diff also as I didn’t realise there was on separate to the gearbox
|
#17
|
||||
|
||||
Quote:
Quote:
I just find it hard to believe that owners have to basically throw piles of money at their cars in order to eliminate an errant whine, which not even Audi can give a definitive answer to. The A8 is their luxury saloon, and should be the epitome of comfort, yet I've read of people going through different wheel sizes 18", 19" and 20", and then going through various makes of tyres, all at their own expense, to try and resolve the problem. And that doesn't even take into account those who have gone down the mechanical route and have been systematically replacing suspensions components, bearings, prop-shafts and whatever else. It would definitely put me off buying a D4 (not that it is likely), especially when people say that their D3s were quieter.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#18
|
|||
|
|||
The d3 is miles the better car, if I could have the stereo, brakes, better engine spec and mpg On the d3, I would keep it
|
#19
|
||||
|
||||
My D4 is a 2014 FL 4.0T TFSi Model so has even funkier engine mounts than standard as it has cylinder shutdown which requires even more complex active engine mounts to offset any shutdown and startup of cylinders, but I dont recognise the symptoms of noise that you are discussing as being present on my car - it's fitted with Falcon F510 tyres (245-45-19) and they rate at 70 Db on noise which is one of the reasons I use them.
__________________
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 |
#20
|
|||
|
|||
FWIW, I never had this issue with my D4 either.
I did on the D3 prior to that, in which case it was a pair of wheel bearings and a full front suspension rebuild.... Oh, and I also had a wheel bearing whine on my D2 Maybe I just got lucky/got out in time with the D4! |
|
|