Oil on rotor

davfer86 · 05-10-2023, 09:28 AM

Good morning, yesterday evening, I took my dog Nico outside to pee, and I notice this on my front driver side rotor.

Looks like is oil. Dripping after I parked.

What do you guys think?

avi66 · 05-10-2023, 09:56 AM

Quote:

Originally Posted by davfer86

Good morning, yesterday evening, I took my dog Nico outside to pee, and I notice this on my front driver side rotor.

Looks like is oil. Dripping after I parked.

What do you guys think?

Would oil mark/stain the rotor like that ?

Looks like whatever it is is reacting with the metal.

davfer86 · 05-10-2023, 10:00 AM

Quote:

Originally Posted by avi66

Would oil mark/stain the rotor like that ?

Looks like whatever it is is reacting with the metal.

was dry, i passed my finger over and couldn't remove it at all, just some oil mark on my finger.

g11hoonigan · 05-10-2023, 10:01 AM

The appearance of 'dots' doesn't suggest it came from your car nor you got them while driving - otherwise it would have smeared across your rotor as you come to stop. But try wiping around the back of you rims with a paper towel (where it makes contact with the rotor hat) and see if there's similar gunk around it.

bbb83 · 05-10-2023, 08:24 PM

Could be the front strut leaking

davfer86 · 05-10-2023, 08:25 PM

Quote:

Originally Posted by bbb83

Could be the front strut leaking

I will stop by the dealership tomorrow

M40i4me · 05-10-2023, 08:40 PM

You sure your dog didn’t pee on it.

davfer86 · 05-10-2023, 08:41 PM

Quote:

Originally Posted by M40i4me

You sure your dog didn’t pee on it.

I do, but is oil

bouchy · 05-11-2023, 06:13 AM

Suspension, or even brake fluid (!!) - also "oily".

AllBlackBimmer · 05-11-2023, 07:35 AM

Check you're struts for oil residue or leakage... if you see dirt built up around the top or bottom, your strut is leaking.

I doubt its engine oil... but i suppose not a complete impossibility.
Is this consistent after multi drives, or was this a one time thing? something just could of splashed up on your rotor. But, if after multi drives you get this residue, i'd suspect its your suspension.

bbb83 · 05-18-2023, 12:00 PM

Quote:

Originally Posted by davfer86

I will stop by the dealership tomorrow

What did you find out?

davfer86 · 05-18-2023, 01:06 PM

Quote:

Originally Posted by bbb83

What did you find out?

Got too busy, marks are gone… there is no way it can be motor oil or strut oil since there is the rotor cover and rotor… i was afraid it can be the break oil.
Anyways.. i installed the 15mm spacers and clean the breaks

05-10-2023, 09:28 AM	#1
davfer86 First Lieutenant 150 Rep 316 Posts Drives: 2023 BMW X3 m40i Join Date: Jan 2021 Location: Edinburg, TX iTrader: (0)	Oil on rotor Good morning, yesterday evening, I took my dog Nico outside to pee, and I notice this on my front driver side rotor. Looks like is oil. Dripping after I parked. What do you guys think? Attached Images
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05-10-2023, 10:01 AM	#4
g11hoonigan Captain 821 Rep 874 Posts Drives: BMW 740i Join Date: Sep 2020 Location: USA iTrader: (0)	The appearance of 'dots' doesn't suggest it came from your car nor you got them while driving - otherwise it would have smeared across your rotor as you come to stop. But try wiping around the back of you rims with a paper towel (where it makes contact with the rotor hat) and see if there's similar gunk around it.
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05-10-2023, 08:24 PM	#5
bbb83 Lieutenant 669 Rep 473 Posts Drives: 2021 x3 m40i Join Date: Mar 2022 Location: usa iTrader: (0)	Could be the front strut leaking
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05-10-2023, 08:40 PM	#7
M40i4me Lieutenant Colonel 1037 Rep 1,530 Posts Drives: 2021 X3 M40i Join Date: Apr 2011 Location: NJ iTrader: (0) Garage List 2021 X3 M40i [10.00]	You sure your dog didn’t pee on it. __________________ 2021 M40i Phytonic Blue / Black Vernasca 2020 X5 xDrive 40i Tanzanite Blue / Coffee Vernasca 2011 328xi. Space Grey - Sold 188,925 great miles
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05-11-2023, 06:13 AM	#9
bouchy Second Lieutenant 83 Rep 258 Posts Drives: X3 (G01) Join Date: Aug 2022 Location: Czech Republic iTrader: (0)	Suspension, or even brake fluid (!!) - also "oily".
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05-11-2023, 07:35 AM	#10
AllBlackBimmer Colonel 818 Rep 2,869 Posts Drives: 2019 X3 m40i Join Date: Aug 2011 Location: USA iTrader: (-1)	Check you're struts for oil residue or leakage... if you see dirt built up around the top or bottom, your strut is leaking. I doubt its engine oil... but i suppose not a complete impossibility. Is this consistent after multi drives, or was this a one time thing? something just could of splashed up on your rotor. But, if after multi drives you get this residue, i'd suspect its your suspension. __________________ 2019 X3 m40i:Carbon Black:Executive:Premium:Adaptive:Vernasca:699M:HK: Ambient:IND trim:M Mirrors:15mm spacers:Maxton lip:20% tint windows/pano:dsg paddles:TLG mudflaps 2008 328i E90 Jet Black:6MT:RWD:Premium:Sport:Xenon:MTEC V3 AEs:Front Splitters:CF spoiler:19" VMR FF v710
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