robrooster5
Member
Anyone had any issues with bubbling paint on bonnet?
If so does bmw cover this under corrosion warranty?
Car is 2014
Thanks
If so does bmw cover this under corrosion warranty?
Car is 2014
Thanks
Bubbling paint on bonnet
- Thread starter robrooster5
- Start date
robrooster5
Member
robrooster5
Member
No it hasn't
Deepseaskateboard
Senior member
Bmw has paint guarantee for a while, you should be covered for a free respray.
Book it in at a BMW bodyshop for appraisal, and quote the paintwork guarantee.
Book it in at a BMW bodyshop for appraisal, and quote the paintwork guarantee.
A
Anonymous
Guest
You have no warranty...
You did have a 36 month paint warranty which would have expired in 2017.
You do have a 12 year anti corrosion warranty but...
It’s an alloy bonnet..not likely to corrode..
It’s a condition of the corrosion warranty that any paint defects are corrected no later than the next BMW service...
So you are on your own :thumbsdown:
This refers ... https://www.bmw.co.uk/en/topics/owners/service-workshop/warranties/new-car-warranty-guidelines.html
You did have a 36 month paint warranty which would have expired in 2017.
You do have a 12 year anti corrosion warranty but...
It’s an alloy bonnet..not likely to corrode..
It’s a condition of the corrosion warranty that any paint defects are corrected no later than the next BMW service...
So you are on your own :thumbsdown:
This refers ... https://www.bmw.co.uk/en/topics/owners/service-workshop/warranties/new-car-warranty-guidelines.html
You do have a warranty, the 12 year anti corrosion warranty
Alloy does corrode, as it did on the alloy roof of my E89 and at least one other forum members roof that I know of!
Providing your service history is complete, the paintwork is original and there is no damage to the paint near the corrosion BMW should respray the bonnet as a minimum.
With my car they fitted a new roof
Alloy does corrode, as it did on the alloy roof of my E89 and at least one other forum members roof that I know of!
Providing your service history is complete, the paintwork is original and there is no damage to the paint near the corrosion BMW should respray the bonnet as a minimum.
With my car they fitted a new roof
A
Anonymous
Guest
Pastry, I’ll be impressed if BMW picks up this case, I doubt the OP has had it serviced continuously by a BMW approved centre etc etc..
Normally alloy panels like the bonnet don’t corrode unless it’s in an area next to a dissimilar metal such as a steel bracket..
The alloy panel normally self passivises itself on exposure to air..
Certain alloys do tend to corrode but it would be illogical for BMW to choose one that does when so many don’t.
Remember there are many 50 year plus planes that are covered in bare aluminium and haven’t corroded away..
Let’s see what BMW says
Normally alloy panels like the bonnet don’t corrode unless it’s in an area next to a dissimilar metal such as a steel bracket..
The alloy panel normally self passivises itself on exposure to air..
Certain alloys do tend to corrode but it would be illogical for BMW to choose one that does when so many don’t.
Remember there are many 50 year plus planes that are covered in bare aluminium and haven’t corroded away..
Let’s see what BMW says
A
Anonymous
Guest
Zed Baron said:
Hi yes salt, even plain old water can have a major destructive effect on aluminium alloys..
However normally with just a large area of alloy the effects are limiting and tend to ‘self heal’ as the salt corrosion still forms an impervious layer..otherwise if you think about it all those alloy steering links and suspension parts under your car would rapidly fail..
Where aluminium alloys and especially magnesium alloys have a big issue is with what we call electrolytic corrosion..
That is a ‘lesser metal’ such as iron (steel) is connected to an alloy structure and then an electrolyte which can be just water is introduced between the two...the combined entity becomes a battery and then the alloy is very rapidly destroyed by the reaction...
In aircraft this happens where steel brackets are attached to the aluminium structure ..
So aircraft use aluminium rivets to stop this issue where if steel rivers were used there would be major corrosion
Early magnesium engines had major issues with for example head gasket leakage due to this type of corrosion causing the alloy to be eaten away by the edge of the gasket..
So reference this bonnet..the blisters appear in the middle of a large area of alloy..it’s difficult to see how this is an electrolyte based reaction..unless there are pinholes in the paint allowing water to get under the paint surface..
I have a number of bonnet chips and there are no signs of any form of corrosion in or around them and I drive all year round..
Pbondar said:Pastry, I’ll be impressed if BMW picks up this case, I doubt the OP has had it serviced continuously by a BMW approved centre etc etc..
Normally alloy panels like the bonnet don’t corrode unless it’s in an area next to a dissimilar metal such as a steel bracket..
The alloy panel normally self passivises itself on exposure to air..
Certain alloys do tend to corrode but it would be illogical for BMW to choose one that does when so many don’t.
Remember there are many 50 year plus planes that are covered in bare aluminium and haven’t corroded away..
Let’s see what BMW says
Pbondar
The car only needs to have been serviced by a garage that followed the BMW service routine and not necessarily a BMW approved centre etc etc..
You obviously love the sound of your own voice, I however am not remotely interested in your opinion of the alloy used by BMW or the aviation industry. I am merely sharing with the OP my real world experience, not opinion, of what was involved in my corrosion warranty claim.
I see no reason why he should not be able to claim if his car meets the same criteria I did.
Good luck with this OP
All this talk about Aluminium aircraft and car bodies not corroding and self healing - - doesnt seem to stop Landroveres from disintegrating and that includes the alloy panels.
As its bubbling from under the paint it maybe a paint reaction from a previous respray repair rather than the bonnet actually corroding.
Very unusual on an original modern paint job .
I had a Ford and claimed on the 6 year corrosion anti perforation warranty once - bonnet rusting.
They measured the paint thickness and said immediatelyy that the vehicle had been resprayed so BMW should be able to tell you pretty quickly.
As its bubbling from under the paint it maybe a paint reaction from a previous respray repair rather than the bonnet actually corroding.
Very unusual on an original modern paint job .
I had a Ford and claimed on the 6 year corrosion anti perforation warranty once - bonnet rusting.
They measured the paint thickness and said immediatelyy that the vehicle had been resprayed so BMW should be able to tell you pretty quickly.
Your paint looks like it has a orange peel effect. That would suggest a respray. The dots could be a reaction to where it was wiped down with some solvent and the paint has reacted. I am assuming with modern paints, being water based, they all have clear coat. There should be no orange peel effect if original.
robrooster5
Member
Thanks for the help guys, Going to head to bmw tomorrow to see if theres anything that can be done, if not I have some quotes around £300-£480, this seems to be the going rate, thought it would have been more but the quotes are of reputable people. 
robrooster5 said:Thanks for the help guys, Going to head to bmw tomorrow to see if theres anything that can be done, if not I have some quotes around £300-£480, this seems to be the going rate, thought it would have been more but the quotes are of reputable people.
Hope all goes well. I had some paint work done on previous last zed under warranty due to bubbling.
