2009 Audi A4 B8 3.0 TDI Quattro - a list of problems...
Discussion
Thanks for reading.
I bought my B8 shape A4 3.0 tdi estate from a probate sale for £1k and what a car. Its powerful and large enough to carry my family anywhere, fast and comfortably. It can be used for the tip run too and saves my 911 and Alpina from these dull duties. Its a well spec'd car with leather, 6spd gearbox, 18 inch wheels etc. My kids call it the dog car, but to me, it is a god send and a truly practical vehicle to munch miles in frugal style.

However, It came with some problems.
1. Radio all worked fine and then today, no volume at all. Not from the radio or the CD changer. The small knob on the centre console mutes, but nothing else. I tried a MMI reset and even disconnected the battery for a few minutes today - nothing.....
2. The passenger side electric seat heats, but the electric seat movement does nothing. Is this related to the water leak?
3. The car has a panoramic sunroof, which opens, closes and tilts as it should. However, the blind is stuck in the closed position. I tried the 'adaptation' but this did not work.
4. Parking sensors feature on the rear bumper of car, but there is no park assist featured in the MMI. Is this normal?
The car also leaks water into the car in the passenger footwell. I have checked the sunroof drains and all seem clear. The water seems to come in from under the glovebox and manifests itself in drips on the plastic sill and a large puddle in my passengers feet.
Any help appreciated. Is there a 'go to' place for correcting these sorts of issues on Audi in the UK?
A youtube video promoted a place called Satnavsystems in Surbiton - Does anyone have any experience of these guys?
I bought my B8 shape A4 3.0 tdi estate from a probate sale for £1k and what a car. Its powerful and large enough to carry my family anywhere, fast and comfortably. It can be used for the tip run too and saves my 911 and Alpina from these dull duties. Its a well spec'd car with leather, 6spd gearbox, 18 inch wheels etc. My kids call it the dog car, but to me, it is a god send and a truly practical vehicle to munch miles in frugal style.
However, It came with some problems.
1. Radio all worked fine and then today, no volume at all. Not from the radio or the CD changer. The small knob on the centre console mutes, but nothing else. I tried a MMI reset and even disconnected the battery for a few minutes today - nothing.....
2. The passenger side electric seat heats, but the electric seat movement does nothing. Is this related to the water leak?
3. The car has a panoramic sunroof, which opens, closes and tilts as it should. However, the blind is stuck in the closed position. I tried the 'adaptation' but this did not work.
4. Parking sensors feature on the rear bumper of car, but there is no park assist featured in the MMI. Is this normal?
The car also leaks water into the car in the passenger footwell. I have checked the sunroof drains and all seem clear. The water seems to come in from under the glovebox and manifests itself in drips on the plastic sill and a large puddle in my passengers feet.
Any help appreciated. Is there a 'go to' place for correcting these sorts of issues on Audi in the UK?
A youtube video promoted a place called Satnavsystems in Surbiton - Does anyone have any experience of these guys?
Experiencing similar problems of a sieve like B8
Stereo issues - check the compartment on the left hand rear of the boot where the Amp / MMI system is - mine was soaking. My MMI has the symptoms shown in https://boserepairexperts.co.uk/ where it just doesn't start up - suggesting the AMP has been water damaged.
Front leaks is often the drains in the front scuttle - they don't seem to clear very well and you end up with water in the front footwell.
Who'd have thought that cutting a great big hole in the roof would cause issues 15 or so years down the line.........
Stereo issues - check the compartment on the left hand rear of the boot where the Amp / MMI system is - mine was soaking. My MMI has the symptoms shown in https://boserepairexperts.co.uk/ where it just doesn't start up - suggesting the AMP has been water damaged.
Front leaks is often the drains in the front scuttle - they don't seem to clear very well and you end up with water in the front footwell.
Who'd have thought that cutting a great big hole in the roof would cause issues 15 or so years down the line.........
J886ATV said:
Front leaks is often the drains in the front scuttle
Sounds a likely cause.Not an Audi but my Son had a Clio that would regularly block the drains. First symptom was usually a misfire as the blocked drain caused water to overflow onto the RH end of the engine and would fill up the no. 4 sparkplug hole around the coilpack and cause a misfire.
A simple 'rodding' with a stainless welding rod and picking the leaves out would cure it.
Pull the plastic cover off from under the bonnet at the scuttle (the one with the removeable cover to access the +ve battery terminal connection). If the drains are blocked there, you'll see a pond of water and detritus. I used to take mine out annually to clean all the leaves and crap out and make sure the drains were clear.
Thanks for the replies and help.
Update. I went to see SatNavSystems in Surbiton on Monday. A decent bunch of people who know what they are doing.
Within the hour, they diagnosed a faulty amplifier in the boot. They showed me the board and it was obvious that there was water damage. They suspect that it was moisture in the car, rather than direct water ingress.
The important bit - To fix £770+vat for a new amplifier!!!! I only paid £1000 for the car....
I will see if i can locate a part number for the B&O amplifier and buy from Ebay. Stand by!!!!
Update. I went to see SatNavSystems in Surbiton on Monday. A decent bunch of people who know what they are doing.
Within the hour, they diagnosed a faulty amplifier in the boot. They showed me the board and it was obvious that there was water damage. They suspect that it was moisture in the car, rather than direct water ingress.
The important bit - To fix £770+vat for a new amplifier!!!! I only paid £1000 for the car....
I will see if i can locate a part number for the B&O amplifier and buy from Ebay. Stand by!!!!
Ray Singh said:
Thanks for the replies and help.
Update. I went to see SatNavSystems in Surbiton on Monday. A decent bunch of people who know what they are doing.
Within the hour, they diagnosed a faulty amplifier in the boot. They showed me the board and it was obvious that there was water damage. They suspect that it was moisture in the car, rather than direct water ingress.
The important bit - To fix £770+vat for a new amplifier!!!! I only paid £1000 for the car....
I will see if i can locate a part number for the B&O amplifier and buy from Ebay. Stand by!!!!
Tis always cheaper up north! https://boserepairexperts.co.uk/audi-a4-a5-s5-bang... are on my bookmarks ready for when I send mine awayUpdate. I went to see SatNavSystems in Surbiton on Monday. A decent bunch of people who know what they are doing.
Within the hour, they diagnosed a faulty amplifier in the boot. They showed me the board and it was obvious that there was water damage. They suspect that it was moisture in the car, rather than direct water ingress.
The important bit - To fix £770+vat for a new amplifier!!!! I only paid £1000 for the car....
I will see if i can locate a part number for the B&O amplifier and buy from Ebay. Stand by!!!!
Thanks J886ATV.
These guys have a comprehensive looking website and look good. I made an enquiry and was asked to provide a part number of my amplifier.
I took it out of the car today and have a sneaky look at the pcb.
Defo signs of water ingress.....




Part number sent to 'tut guys up norf. I will keep you all updated.
These guys have a comprehensive looking website and look good. I made an enquiry and was asked to provide a part number of my amplifier.
I took it out of the car today and have a sneaky look at the pcb.
Defo signs of water ingress.....
Part number sent to 'tut guys up norf. I will keep you all updated.
Ok, so water damaged unit sent to the Bose repair Experts. They are confident that they can rescue this.
Whilst the unit is away, i need to find where the water ingress in the car is coming from. I have had the usual water in the footwell story and am glad that the car came with rubber floor mats!

I took part of the headlining down and was shocked to see mould and water staining on the back of the headliner itself. I bought some CT-1 silicone and adhesive as i thought that the issue was the water drain pipes. When i pour water into the channels on the sunroof, i can see that the seals of the little white part was perished where it joins the pipe. I sealed this and also added a bead of sealant to the inside of the fitting and put back on. I've only been able to get to the front two drains at this point


I tried with water again and noted that the leak is actually coming from the frame itself. A lot of water!!! Checking the internet, this is a common issue and a new frame is over £1000!!
It now seems that I will have to take the headliner down all together and then the sunroof cassette and investigate and reseal, before fitting it back to the car again. Who designs this rubbish? It might give me something to do over the Xmas vacation, i cant bear watching Only Fools and Horses again..... I might be able to investigate the sunroof blind operation whilst I am in there......
Edit - is there a liquid waterproofer that I can paint onto this to make it water tight and avoid removing the lot from the car?
Edit Edit - I also contacted Webasto who have an office in Doncaster to see if they can help with technical diagrams and the bonding agent used.
Whilst the unit is away, i need to find where the water ingress in the car is coming from. I have had the usual water in the footwell story and am glad that the car came with rubber floor mats!
I took part of the headlining down and was shocked to see mould and water staining on the back of the headliner itself. I bought some CT-1 silicone and adhesive as i thought that the issue was the water drain pipes. When i pour water into the channels on the sunroof, i can see that the seals of the little white part was perished where it joins the pipe. I sealed this and also added a bead of sealant to the inside of the fitting and put back on. I've only been able to get to the front two drains at this point
I tried with water again and noted that the leak is actually coming from the frame itself. A lot of water!!! Checking the internet, this is a common issue and a new frame is over £1000!!
It now seems that I will have to take the headliner down all together and then the sunroof cassette and investigate and reseal, before fitting it back to the car again. Who designs this rubbish? It might give me something to do over the Xmas vacation, i cant bear watching Only Fools and Horses again..... I might be able to investigate the sunroof blind operation whilst I am in there......
Edit - is there a liquid waterproofer that I can paint onto this to make it water tight and avoid removing the lot from the car?
Edit Edit - I also contacted Webasto who have an office in Doncaster to see if they can help with technical diagrams and the bonding agent used.
Edited by Ray Singh on Wednesday 10th December 20:48
Edited by Ray Singh on Thursday 11th December 11:42
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