Need Help With Brake Rotors!!!!

Elitehend26 · 02-26-2011, 12:25 PM

I purchased drill slotted brake rotors for my BMW335I 2007 sports package E90, however they are a little bit smaller than my OEM brakes so the my mech was a little hessitant to install them and told me to verify that this big size difference is normal.. The rotors are specifically for my car but they are just a little smaller, is this normal with non-OEM parts for this car since its a sports packaged car?

noro · 02-26-2011, 01:23 PM

Explain a little smaller? The pad generally extends all the way to the edge of the rotor. Which means if it was a little smaller the outer edge of the pad would not be a touching the rotors. I wouldn't even think about installing them.

Chriztofor · 02-26-2011, 02:00 PM

With brakes I wouldn't take chances, either get rotors that match-up or buy OEM.

chazzz · 02-26-2011, 02:15 PM

"Little smaller"?? Don't install them!! Get the RIGHT-sized rotors. I believe that those "little smaller" rotors are for 325i, 328i and 330i?? The 335i rotors are bigger.

nukezero · 02-26-2011, 02:50 PM

heck no.. should be the same dimension. did you buy some ebay chinese rotors? always use oem parts or performance parts.

Coolieman1220 · 02-26-2011, 03:14 PM

one time i did brakes, got the wrong part and the rear rotor was like an 1/8 of an inch too wide for the parking brake drum housing hub business and it seemed fine. Put it all on the car and the car would not move!

stressdoc · 02-26-2011, 11:03 PM

We need more specific information to help you. That said, my initial response is wtf, how did you not get the right parts? Do not install different sized rotors.

Thumperx · 02-27-2011, 09:23 AM

Quote:

Originally Posted by Elitehend26

I purchased drill slotted brake rotors for my BMW335I 2007 sports package E90, however they are a little bit smaller than my OEM brakes so the my mech was a little hessitant to install them and told me to verify that this big size difference is normal.. The rotors are specifically for my car but they are just a little smaller, is this normal with non-OEM parts for this car since its a sports packaged car?

You did not mention which: maker of brakes rotors you purchased, purchased front and rear rotor (?), or what is the size of these rotors you got. 335i models comes with 13.7" front and 13.2" rear which are meant to work with both single-piston floating calipers.

Make sure you did not get the 135's 13.3" front (6 piston) or 12.8" rear rotors by mistake which are sized similar.

When it comes to brake, don't play around and make sure you got the correct one. Don't take short cuts.

02-26-2011, 12:25 PM	#1
Elitehend26 Elitehend26 0 Rep 5 Posts Drives: 335I E90 Join Date: Oct 2009 Location: Virginia Beach, VA iTrader: (0)	Need Help With Brake Rotors!!!! I purchased drill slotted brake rotors for my BMW335I 2007 sports package E90, however they are a little bit smaller than my OEM brakes so the my mech was a little hessitant to install them and told me to verify that this big size difference is normal.. The rotors are specifically for my car but they are just a little smaller, is this normal with non-OEM parts for this car since its a sports packaged car?
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02-26-2011, 01:23 PM	#2
noro Colonel 90 Rep 2,707 Posts Drives: '91 M3, '04 E46 ZHP, '72 2002 Join Date: Aug 2006 Location: Boston iTrader: (0)	Explain a little smaller? The pad generally extends all the way to the edge of the rotor. Which means if it was a little smaller the outer edge of the pad would not be a touching the rotors. I wouldn't even think about installing them. __________________ zhpregistry.net - ZHP stats and free classifieds.
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02-26-2011, 02:00 PM	#3
Chriztofor Colonel 103 Rep 2,783 Posts Drives: '06 325i and '13 X5 Join Date: Feb 2010 Location: Chicago Burbs iTrader: (1)	With brakes I wouldn't take chances, either get rotors that match-up or buy OEM. __________________ If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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02-26-2011, 02:15 PM	#4
chazzz Captain 116 Rep 712 Posts Drives: 2018 Chrysler 300S Join Date: Sep 2007 Location: Southern California iTrader: (4)	"Little smaller"?? Don't install them!! Get the RIGHT-sized rotors. I believe that those "little smaller" rotors are for 325i, 328i and 330i?? The 335i rotors are bigger. __________________ SOLD - 2007 BMW 335i Sedan, Montego Blue with Lemon seats, AluFelgen CS7 rims & Continental DW tires CURRENT - 2018 Chrysler 300S, Crystal Granite Metallic.
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02-26-2011, 02:50 PM	#5
nukezero Major 346 Rep 1,465 Posts Drives: BMW 3 series Join Date: Sep 2008 Location: Irvine iTrader: (8)	heck no.. should be the same dimension. did you buy some ebay chinese rotors? always use oem parts or performance parts.
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02-26-2011, 03:14 PM	#6
Coolieman1220 Banned 73 Rep 1,770 Posts Drives: 2010 335d Join Date: Jul 2010 Location: New York City iTrader: (0)	one time i did brakes, got the wrong part and the rear rotor was like an 1/8 of an inch too wide for the parking brake drum housing hub business and it seemed fine. Put it all on the car and the car would not move!
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02-26-2011, 11:03 PM	#7
stressdoc Moderator 618 Rep 10,858 Posts Drives: BMW i8; Toy 4runner TRD pro Join Date: Jun 2005 Location: Waco TX iTrader: (0)	We need more specific information to help you. That said, my initial response is wtf, how did you not get the right parts? Do not install different sized rotors. __________________ My recent ED photos: http://f80.bimmerpost.com/forums/sho....php?t=1026808 my not-so-recent ED: http://www.e90post.com/forums/showthread.php?t=31829 Please join BMWCCA http://bmwcca.org/index.php?pageid=c...&ref_by=300279
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