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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > MAF Sensor O-Ring on Charge Pipe

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      09-07-2019, 08:09 PM   #1
jessetaylor1
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MAF Sensor O-Ring on Charge Pipe

Hey,

Just finished install of my Evolution Racewerks charge pipe after my stock one blew. While putting the stock MAF sensor into the new pipe, it's green o-ring was cut a little.

Anyone know where I can grab an OEM one? BMW wants to sell me the entire sensor and ECS tuning doesn't have any. Can't find it on realoem either...
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      09-07-2019, 11:09 PM   #2
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The same o-ring is part of the oil filter kit. Part # 11427854445. the part # is for the whole kit: oil filter, and o-rings
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      09-09-2019, 07:55 AM   #3
jessetaylor1
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No, not the black O-Ring that goes inside the charge pipe, I'm talking of the very small O-Ring that's green that fits around the MAF sensor. It's about as wide as a finger.
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      09-09-2019, 11:48 AM   #4
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Quote:
Originally Posted by jessetaylor1 View Post
No, not the black O-Ring that goes inside the charge pipe, I'm talking of the very small O-Ring that's green that fits around the MAF sensor. It's about as wide as a finger.
I know, that's what I'm talking about. The oil filter kit includes that very same green o ring used on the MAP sensor.

I'm speaking from having gone through the same thing as you with nicking the o-ring when changing out my charge pipe
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      09-09-2019, 02:32 PM   #5
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Oh, thanks!

https://www.ecstuning.com/b-genuine-...t/11427854445/

This one, correct?
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      09-09-2019, 02:33 PM   #6
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Quote:
Originally Posted by jessetaylor1 View Post
That's the one!
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      09-09-2019, 10:42 PM   #7
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Quote:
Originally Posted by nioh_lbbm2 View Post
That's the one!
Why does the oil kit come with a MAF sensor o-ring? Are you supposed to replace it with every oil change? Or is it used for something else.
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      09-09-2019, 10:45 PM   #8
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Quote:
Originally Posted by Anthony1s View Post
Quote:
Originally Posted by nioh_lbbm2 View Post
That's the one!
Why does the oil kit come with a MAF sensor o-ring? Are you supposed to replace it with every oil change? Or is it used for something else.
I'm not sure. I haven't done the oil change myself so not sure what it is supposed to replace
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      09-10-2019, 09:56 AM   #9
ddk632
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That small o-ring is used during the oil change. It goes on the tip of the oil filter canister. Not related to MAF sensor, except it happens to be same size. Funny enough, I nicked my MAF sensor o-ring as well, when I did my charge pipe upgrade; I left it as is. Will probably replace it, but then my extra oil filter kits will be missing an o-ring.

Wish we could just buy the damn o-ring by itself!
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