G05
BMW X5
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05-12-2026LAST POST
05-08-2023
MY21, 40i, about 30k miles.

I noticed what appears to be an "oil leak" at the turbo intake and where the PCV pipe connects to the charged intake tube. I did not notice any leak from the top that would suggest that the oil dropped from above. My initial theory is that it's coming from the PCV tube.

1. Would/should this be covered under warranty? or is this normal wear and tear?

2. Any thoughts as to where the oil came from and how to fix?
An image attached to this post, provided by the posterAn image attached to this post, provided by the posterAn image attached to this post, provided by the posterAn image attached to this post, provided by the posterAn image attached to this post, provided by the posterAn image attached to this post, provided by the poster
05-08-2023
Can you reach under PCV cable and check id there is oil there? How about check valve cover gasket as well. BMW inline6 lean on exhaust side. If mild leak starts, oil always make it onto exhaust first.
05-08-2023
@eelnoraa,

Will check on those two locations and report back. Thank you.
05-08-2023
It’s a MY21, so it’s still covered under the 4yr/50k bumper to bumper. Just bring it to the dealer.
05-08-2023
ladra wrote
@eelnoraa,

Will check on those two locations and report back. Thank you.
Mine has 4500 ICE miles only, still look shiny from new. But valve cover gasket is a typical bmw maintenance item later. 40k mile is a bit early, but not unheard of. It is easy to check. Use a clean paper towel, wipe along the passenger side valve cover/head seam. If you get black residual, you have a mild leak. If you get oil in paper tower, then yea leak is moderate.

I agree, if it is under warranty, let bmw fix it.
08-16-2025
ladra wrote
MY21, 40i, about 30k miles.

I noticed what appears to be an "oil leak" at the turbo intake and where the PCV pipe connects to the charged intake tube. I did not notice any leak from the top that would suggest that the oil dropped from above. My initial theory is that it's coming from the PCV tube.

1. Would/should this be covered under warranty? or is this normal wear and tear?

2. Any thoughts as to where the oil came from and how to fix?
OP, what did you end up doing to fix the issue? I just observed some oil seepage in the same location. Not as much as yours. But like to know your solution. I am thinking to install a DIY oil catch can to mitigate the issue.

Btw, mine is MY20 xdrive 40i at 36K miles now.

Thanks !
08-16-2025
yzhou2004 wrote
OP, what did you end up doing to fix the issue? I just observed some oil seepage in the same location. Not as much as yours. But like to know your solution. I am thinking to install a DIY oil catch can to mitigate the issue.

Btw, mine is MY20 xdrive 40i at 36K miles now.

Thanks !
I just observed the same oil, ended up needing new turbo. Bearings on the turbo were shot.
An image attached to this post, provided by the posterAn image attached to this post, provided by the poster
08-17-2025
Astone22 wrote
I just observed the same oil, ended up needing new turbo. Bearings on the turbo were shot.
thanks for sharing. did you experience any symptons or only oil leak at inspections?
08-17-2025
No symptoms. I was inspecting the car after replacing the oil pump.not sure how they missed this after installing a new oil pump but they did
08-17-2025
Astone22 wrote
I just observed the same oil, ended up needing new turbo. Bearings on the turbo were shot.
What year, model and mileage is your car when you had the turbo replaced?
08-17-2025
M a r t y wrote
What year, model and mileage is your car when you had the turbo replaced?
2019 40i 53k miles
08-18-2025
yzhou2004 wrote
OP, what did you end up doing to fix the issue? I just observed some oil seepage in the same location. Not as much as yours. But like to know your solution. I am thinking to install a DIY oil catch can to mitigate the issue.

Btw, mine is MY20 xdrive 40i at 36K miles now.

Thanks !
yzhou2004,
BMW changed the gasket that connects the charge pipe to the turbo. BUT I think it's starting to leak again...
08-18-2025
ladra wrote
yzhou2004,
BMW changed the gasket that connects the charge pipe to the turbo. BUT I think it's starting to leak again...
Hmm. I am not sure the connection between the turbo (cold side) to charge pipe has a gasket. They are usually just clamp on. Charge pipe is plastic anyway, so sealing surface isn’t mantel to metal.

And charge pipe itself should NOT have any meaningful oil there. Technically there should be NO oil in charge pipe at all. Small amount of oil in charge pipe comes from PCV. I think if charge pipe has enough oil to leak, maybe need to challenge bmw where are those oil come from?
03-22-2026
Hi Eelnoraa,
Thanks for sharing your experience!
I have the exact same issue, I own a 2020 x5 40i with 67,000km.
Do you mind sharing how much did you pay for the fix and if it was in us$ or can$?
Thank you so much
03-22-2026
Ash_2020x5 wrote
Hi Eelnoraa,
Thanks for sharing your experience!
I have the exact same issue, I own a 2020 x5 40i with 67,000km.
Do you mind sharing how much did you pay for the fix and if it was in us$ or can$?
Thank you so much
He may or may not see your request. Try again but first type the at symbol (@), followed by his handle. That should bring up a listing of people for you to pick from.

It should look like this

.
An image attached to this post, provided by the poster
03-22-2026
Ash_2020x5 wrote
Hi Eelnoraa,
Thanks for sharing your experience!
I have the exact same issue, I own a 2020 x5 40i with 67,000km.
Do you mind sharing how much did you pay for the fix and if it was in us$ or can$?
Thank you so much
I think first need to determine what is the problem. My 45e hasn’t had leak yet. Knock on wood. But it doesn’t use engine often.

Charge pipe with some small oil trace, I will leave it as it is. Most likely this is from PVC. It is the natural is modern bmw turbo engine. You can reduce it by installing oil catch can, but you cannot eliminate.

If you have a lot of oil in charge pipe, I will look into turbocharge, maybe look for shift play. Turbine shift is lube by oil. If shaft has too much play due to wear, oil will leak into exhaust and charge pipe. If this is the case, turbo will need to be replaced. This is kind of expansive because the turbo is expansive.

If you car has warranty, by all means have dealer fixed it. If without warranty, do look around beside dealers. Majority of of repair cost is labor. Dealer labor is high. Dealer tech usually isn’t the best at diagnosis and repair.
03-22-2026
ladra's user avatarladra
Thanks for explaining.
I was trying to ask ladra, it looks like they already replaced the whole turbo system
Cheers
03-23-2026
The turbo inlet and outlet both have gaskets. I recently replaced both because I found some oil mist around that area like the OP. The turbo to charge pipe one was fairly easy because you can get to it from underneath. The inlet one was much more involved because it required removing the air filter box long with electrical connections and other smaller hoses connected to it.

These are the part numbers for the gaskets:
https://www.fcpeuro.com/products/bmw-pre-formed-seal-genuine-bmw-13718648429

https://www.fcpeuro.com/products/bmw-preformed-seal-genuine-bmw-13718696103
03-23-2026
bacern wrote
The turbo inlet and outlet both have gaskets. I recently replaced both because I found some oil mist around that area like the OP. The turbo to charge pipe one was fairly easy because you can get to it from underneath. The inlet one was much more involved because it required removing the air filter box long with electrical connections and other smaller hoses connected to it.
Do you know what was causing the oil mist you saw? Now that you have new gaskets, has the oil mist returned? How many miles before and after the gasket change?
03-23-2026
M a r t y wrote
Do you know what was causing the oil mist you saw? Now that you have new gaskets, has the oil mist returned? How many miles before and after the gasket change?
Well, I'm hoping it was the old gaskets that failed that was causing the mist. I just bought the car a couple months ago, so unfortunately I don't know when the mist started. The car has about 65k now, and I just replaced the gaskets a couple weeks ago. Took a look at it this morning, and it still looks dry. I feel pretty confident that the gaskets were causing the oil film/mist.
03-23-2026
bacern wrote
Well, I'm hoping it was the old gaskets that failed that was causing the mist. I just bought the car a couple months ago, so unfortunately I don't know when the mist started. The car has about 65k now, and I just replaced the gaskets a couple weeks ago. Took a look at it this morning, and it still looks dry. I feel pretty confident that the gaskets were causing the oil film/mist.
From OP’s picture, oil deposite is in the top of the charge pipe. I am thinking I’d charge pipe gasket leak, majority of oil should be at the bottom. Now I’d charge pipe leak that much, air in charge pipe metered, you will get CEL because it is a vacuum leak. Not that I don’t believe you, just trying to reason this out.
03-23-2026
eelnoraa wrote
From OP’s picture, oil deposite is in the top of the charge pipe. I am thinking I’d charge pipe gasket leak, majority of oil should be at the bottom. Now I’d charge pipe leak that much, air in charge pipe metered, you will get CEL because it is a vacuum leak. Not that I don’t believe you, just trying to reason this out.
The OP's pictures are focused on the turbo inlet from the air filter. The turbo outlet to the charge pipe is underneath the inlet. It would seem like more oil would come out of the outlet side at the charge pipe since that's where the pressure is. It would also seem like the inlet side shouldn't have any oil coming out since it's sucking in. Maybe the outlet side leaks a little mist out that settles on both pipes. That's my best guess. I've hooked up a scanner and didn't find any error codes.