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Great description of airbag replacement, thanks.

I have changed the near side airbag on my f11 2014 myself (I am not a mechanic but I would call myself a good with the right guidance DIYer ) I took guidance from a very close friend and mechanic. Instead of using the computer to deflate the suspension I simply jacked the rear of the car , removed the plastic covers for the compressor and slowly released the air from the system by undoing the compression 10mm  nut. The air slowly escapes and you can physically feel the airbag going soft at which point it can be removed. 
I did notice that once changed and fully inflated the opposite side started sagging over the next couple of days so will be replacing the other side soon. On removal I noticed that the off side airbag has a hard plastic ring on the top ? A spacer but not sure. Any ideas welcome. I will replace the airbag with the spacer.

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15 minutes ago, DMint said:

Great description of airbag replacement, thanks.

I have changed the near side airbag on my f11 2014 myself (I am not a mechanic but I would call myself a good with the right guidance DIYer ) I took guidance from a very close friend and mechanic. Instead of using the computer to deflate the suspension I simply jacked the rear of the car , removed the plastic covers for the compressor and slowly released the air from the system by undoing the compression 10mm  nut. The air slowly escapes and you can physically feel the airbag going soft at which point it can be removed. 
I did notice that once changed and fully inflated the opposite side started sagging over the next couple of days so will be replacing the other side soon. On removal I noticed that the off side airbag has a hard plastic ring on the top ? A spacer but not sure. Any ideas welcome. I will replace the airbag with the spacer.

 

What replacements are you fitting? I used Arnott and the instructions said they did not require the black plastic fitment and it could be discarded.

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Did mine the other week both sides. Must say easier than what you think. Hardest part is just putting the airbag back into position around the brakes. It’s a tight squeeze but I think I replaced both sides in a hour n half 

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Just now, Sdbmw said:

Did mine the other week both sides. Must say easier than what you think. Hardest part is just putting the airbag back into position around the brakes. It’s a tight squeeze but I think I replaced both sides in a hour n half 

Same here, was dreading it a bit but it was really easy. 

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Hi,

 

This is the one ‘common fault’ on the F11 that I’m dreading having just forked out for the car and 4 new tyres. My tyres were fitted by a mobile fitter so I had the luxury of inspecting the brakes and airbags whilst the car was jacked up. The airbags seem to be ok but to be honest I know that’s not much of a guarantee. A few pics I took at the time are below.

 

I think I’d have a go at this if I had ramps but I wouldn’t trust being under the car with my hydraulic trolly jack so this is one job that I’ll ask an independent to do (when the time comes).

 

cheers

Andy

 

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9C8F600D-11DE-4BC4-9E57-A647835DF9E2.jpeg

34E2879C-522F-432D-B430-61BEE5C12EAA.jpeg

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Mine looked pretty much like that but both were leaking. I used a jack and axle stands. It's a pretty easy job. Hardest part was getting the lower trim panel off to bleed them from the valve block.

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21 minutes ago, JCP said:

Mine looked pretty much like that but both were leaking. I used a jack and axle stands. It's a pretty easy job. Hardest part was getting the lower trim panel off to bleed them from the valve block.

That’s my fear - I imagine you can’t really tell how healthy the bag is just by looking at it, especially if they have pin-holes.

I have a trolley Jack but no axle stands so definitely not worth the hassle plus I’m not sure if my trolley Jack could handle the weight to lift the whole rear at the same time.

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9 minutes ago, F1-11 said:

I imagine you can’t really tell how healthy the bag is just by looking at it

 

It's much easier to see the deterioration once they're off the car. See my photos further up the thread. 

 

12 minutes ago, F1-11 said:

Jack but no axle stands so definitely not worth the hassle plus I’m not sure if my trolley Jack could handle the weight to lift the whole rear at the same time

 

I had to buy a decent jack and stands to do mine but as the Indy specialist I was dealing with had quoted 2 hours labour just to diagnose the fault they almost paid for themselves straight away and I've since more than recouped the initial outlay using them on other jobs.

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15 minutes ago, Cadwell Parker said:

 

It's much easier to see the deterioration once they're off the car. See my photos further up the thread. 

 

 

I had to buy a decent jack and stands to do mine but as the Indy specialist I was dealing with had quoted 2 hours labour just to diagnose the fault they almost paid for themselves straight away and I've since more than recouped the initial outlay using them on other jobs.

Thanks Cadwell, that’s made it seem somewhat more tempting. The actual replacement job doesn’t worry me too much but I’m very worried about the safety side of things and making sure it’s jacked and propped safely. 
 

Thanks!

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1 hour ago, F1-11 said:

Hi,

 

This is the one ‘common fault’ on the F11 that I’m dreading having just forked out for the car and 4 new tyres. My tyres were fitted by a mobile fitter so I had the luxury of inspecting the brakes and airbags whilst the car was jacked up. The airbags seem to be ok but to be honest I know that’s not much of a guarantee. A few pics I took at the time are below.

 

I think I’d have a go at this if I had ramps but I wouldn’t trust being under the car with my hydraulic trolly jack so this is one job that I’ll ask an independent to do (when the time comes).

 

cheers

Andy

 

04B593E3-4DB3-43B3-BA2B-2C6ABCD4A09A.jpeg

 

 


To prolong the bag’s life, you need to jack the car up, remove the wheel and give that bag a good clean with soapy water to get rid of all that grit. As the bag folds over on itself from this fully extended position, the grit acts as sandpaper and wears the rubber much quicker. 

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1 minute ago, Matthew Ashton said:


To prolong the bag’s life, you need to jack the car up, remove the wheel and give that bag a good clean with soapy water to get rid of all that grit. As the bag folds over on itself from this fully extended position, the grit acts as sandpaper and wears the rubber much quicker. 

Great advice Matthew, thanks. I wish I’d done that when I took the photos. I completely see that grit would, over time, grind away at the folder rubber until eventually it’s structurally weakened. Looks like I’m going to have some diy work to do!

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2 minutes ago, F1-11 said:

Great advice Matthew, thanks. I wish I’d done that when I took the photos. I completely see that grit would, over time, grind away at the folder rubber until eventually it’s structurally weakened. Looks like I’m going to have some diy work to do!


I used to do this every 6 months on my old F11. It was still on the original bags when I sold it at 8 years old and 54000 miles. 

Edited by Matthew Ashton

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2 minutes ago, Matthew Ashton said:


I used to do this every 6 months on my old F11. It was still on the original bags when I sold it at 8 years old and 54000 miles. 

That’s great - certainly makes me keen to do that same. I’d rather avoid the cost of replacement with some easy preventative maintenance. Thanks again

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It only takes one little sharp stone to put a hole in them, can happen any time. I wouldn't worry. 

 

Plus just buy the £30 ones, there is no difference to how the car rides. 

 

You can make more difference adjusting the ride height, lower it 10mm and it rides a little softer, up it 10mm and it firms up more. 

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1 hour ago, gIzzE said:

It only takes one little sharp stone to put a hole in them, can happen any time. I wouldn't worry. 

 

Plus just buy the £30 ones, there is no difference to how the car rides. 

 

You can make more difference adjusting the ride height, lower it 10mm and it rides a little softer, up it 10mm and it firms up more. 

I didn’t realise you could adjust the height? Wouldn’t that look a bit odd if you lowered it because the front would still remain the same?

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1 hour ago, gIzzE said:

It only takes one little sharp stone to put a hole in them, can happen any time. I wouldn't worry. 

 

Plus just buy the £30 ones, there is no difference to how the car rides. 

 

You can make more difference adjusting the ride height, lower it 10mm and it rides a little softer, up it 10mm and it firms up more. 

I didn’t realise you could adjust the height? Wouldn’t that look a bit odd if you lowered it because the front would still remain the same?

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Not really, not 1cm. 

 

I found the adjustment as the Arnotts springs sat higher at the back than the OEM springs as standard, nearly 20mm higher, so I dropped them by 20mm, but they were then a little too soft, so I raised them by 10mm and felt fine and didn't look noticeably higher. 

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26 minutes ago, gIzzE said:

Not really, not 1cm. 

 

I found the adjustment as the Arnotts springs sat higher at the back than the OEM springs as standard, nearly 20mm higher, so I dropped them by 20mm, but they were then a little too soft, so I raised them by 10mm and felt fine and didn't look noticeably higher. 

Is the adjustment made electronically?

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Easiest way to deflate the bag is to just push a screwdriver through the rubber. Saves undoing the solenoid ends. 
Also you can do one side at a time as they are totally independent of each other. 

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On 5/13/2021 at 4:13 PM, GeeJayJoe said:

Easiest way to deflate the bag is to just push a screwdriver through the rubber. Saves undoing the solenoid ends. 
Also you can do one side at a time as they are totally independent of each other. 


This will be the method I use next time. 
I’ve done both - cover off the compressor to deflate but it takes a while and then using ISTA/Foxwell but sometimes it does not deflate enough with 2 runs. 
 

Reckon as long as I’m careful by making a small hole first the screwdriver/Stanley knife will save a whole load of time. 

Edited by Munzy123

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