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D3 - Common Faults Quick links to all known common faults and their solutions

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  #1  
Old 8th July 2022, 09:03 PM
hunker7 hunker7 is offline
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Default 06' A8 - few issues

New to D3 and there are few issues I'd like to resolve and need some advice from the professionals.

First being after windscreen replacement auto lights don't won't anymore, permanently on, where would one start?

Second is error code for both engine mounts, solenoid open circuit? Is this fixable or required new mounts?

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Old 9th July 2022, 08:43 AM
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Windscreen - Two possible reasons
1. They used the 'cheese wire' method to remove the windscreen and cut through the wire (#31) in the attached image.
2. The wire (#31) wasn't cut when removing the windscreen but wasn't connected again.

Part number for the wire is 4E0970291 (£15).

Engine mounts - Most people tend to live with them being faulty, especially at £400 each.
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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
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Old 9th July 2022, 09:55 AM
MikkiJayne MikkiJayne is offline
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There's an OE retrofit-bodge for the engine mounts I think, which is just a plug with a resistor in it to make the light go out. Can't remember where I've seen it though.
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Old 9th July 2022, 07:44 PM
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homer simpson homer simpson is offline
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Quote:
Originally Posted by MikkiJayne View Post
There's an OE retrofit-bodge for the engine mounts I think, which is just a plug with a resistor in it to make the light go out. Can't remember where I've seen it though.
I've seen this somewhere too but struggled to find it when I was looking! Damn wish I saved the part number lol. I'm sure ETKA didn't list it either
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Old 9th July 2022, 08:24 PM
HPsauce HPsauce is offline
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Quote:
Originally Posted by steamship View Post
Engine mounts - Most people tend to live with them being faulty, especially at £400 each.
I'm not a D3 owner but even my first reaction was to recall seeing exactly that many times, a problem not worth solving!
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Old 10th July 2022, 08:23 AM
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Have seen mention of a TSB for the engine mounts but can't find any specific details about it. However, I did come across several references in relation to similar issues on A4s and A6s, with one comment for a DIY solution being a 19ohm resistor. The issue seems to be more pronounced on these cars as 034 Motorsport actually sell a 'resistor bypass connector':

https://store.034motorsport.com/resi...udi-s4-v8.html
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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
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  #7  
Old 11th July 2022, 11:26 AM
hunker7 hunker7 is offline
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Checked and wire is intact and plugged in on both ends, next stop I'd imagine is replacing rain/light sensor?

As for engine mounts, they're not triggering EML and I can't say there is much difference in smoothness I guess, just noticed a code that won't go away.
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Old 11th July 2022, 05:57 PM
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Quote:
Originally Posted by hunker7 View Post
Checked and wire is intact and plugged in on both ends, next stop I'd imagine is replacing rain/light sensor?
Assuming the sensor is at fault, there are two versions:
1. Light sensor only - 4E0907262 ~£85
2. Light AND rain sensor - 8K0955559A (~£215) or superseded with 8K0955559D (~£235)
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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
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Old 11th July 2022, 05:59 PM
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homer simpson homer simpson is offline
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If it was done recently and stopped working since, I would get them back out to sort it

As for the engine mounts, try and get a visual on them, if they look OK and the ride seems good along with no engine shake on idle/start up, I would leave them for now
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2008 (facelift) S8 with B&O, ACC, glass sunroof, reversing camera, front and rear heated seats, ceramic brakes, homelink, electric side and rear blinds, ski load through, heated fan washer jets, remote boot closing, de-flapped manifold, fridge, umbrella holder
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Old 12th July 2022, 11:31 AM
hunker7 hunker7 is offline
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Quote:
Originally Posted by steamship View Post
Assuming the sensor is at fault, there are two versions:
1. Light sensor only - 4E0907262 ~£85
2. Light AND rain sensor - 8K0955559A (~£215) or superseded with 8K0955559D (~£235)
Checked wiring again and all good, and sensor don't look healthy as it seems it needs to be filled with gel. So I'll look out for new one.
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