Air Duct Split + Replace

I have been wanting to clean the engine bay in my E52 for a while now, its a special car so why not make what's under the bonnet look its best.  I removed the air box and the cover from the air filter, and then to my horror noticed that there was a split in the air ducting.


Checking on my favourite part diagram site I located the part number which is 16576-1AA1A.  Seems that the part is common to Murano's as well, but I found an aftermarket one on Ali Express for under £20, and so ordered that.  If you need one its here <Air Duct>:

Admittedly it did take 2 weeks to arrive, but looked pretty much identical to the old one.  To replace the air duct if you have the same issue, you need to use pliers to move the spring clip from the bottom hose.


Then loosen the metal collars using the two screw points highlighted here.

Getting the old one off was easy, and a quick comparison picture for you to see how they look.  Top is the old one.


The new air duct was a bit tighter getting on to the engine and air box connections, but a very very tiny amount of grease helped me get it on there.  Then just tightening up the screws and replacing the clip back onto the hose.  It was all simple and quick to do.

I have seen some Facebook posts about power stutters on acceleration, and bad MPG being linked to splits in the air hose.  So if you are seeing those kind of issues it would be worth checking yours out.  I think mine was not causing much issue but would of got worse over time as the split got bigger and the hose separated.

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