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Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking

Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 11-15-2013, 04:51 PM   #1
william donovan
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1999 vs 2000 rotor size

anyone ever run across the different size rotor based on year built? I have a 2000 323i and went to local auto parts store to get a set of rotors for the rear brakes. bought for a 2000 and they were too big. the build date is 10/99 on the car. Should I try a set of 1999 rotors?
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Old 11-15-2013, 05:27 PM   #2
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They're the same size.

You either got the wrong rotor, or told them a different model.
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Old 11-15-2013, 06:11 PM   #3
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Have them recheck the part numbers, maybe they gave you a 328i rotor, it's larger.
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Old 11-16-2013, 08:24 AM   #4
william donovan
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when you come home from the auto parts store and the one you just bought is too big, and the part number matches up, made me wonder if the build date has anything to do with it...
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Old 11-16-2013, 09:06 AM   #5
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Did you get front rotors on accident?
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Old 11-16-2013, 09:17 AM   #6
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The 323i has a 10.9" rear rotor,
the 328i has a 11.6" rear rotor.

It depends on the model, measure the rotor.
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Old 11-16-2013, 01:16 PM   #7
william donovan
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OK.... here is the solution to the mystery....part number comes up correct, but I took my rotor up there and wala! Fits up to a 1999 323I!
That's why I asked the question the way I did....so all who come in here after me.....use this info, or you will end up making multiple trips to the store
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Old 11-16-2013, 02:16 PM   #8
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The 1999 and the 2000 323i use different size rotors?
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Old 11-16-2013, 02:28 PM   #9
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Quote:
Originally Posted by william donovan View Post
OK.... here is the solution to the mystery....part number comes up correct, but I took my rotor up there and wala! Fits up to a 1999 323I!
That's why I asked the question the way I did....so all who come in here after me.....use this info, or you will end up making multiple trips to the store
http://realoem.com/bmw/showparts.do?...14&hg=34&fg=12


I looked up a 1998 production (1999 model year) 323i.
Same rotor size was used throughout the life of the vehicle.
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Old 11-16-2013, 02:41 PM   #10
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Yeah, I'm more inclined to believe the idiots at your local auto-store got it wrong - not everyone else. This thread should be deleted so people don't get the wrong information. It's hard enough as it is searching through repost after repost and then having to discern misinformation?

1999 rear rotors:
http://www.bimmerparts.com/ShopByVeh...20Rear&mode=PA

2000 rear rotors:
http://www.bimmerparts.com/ShopByVeh...20Rear&mode=PA

Last edited by Cavi Mike; 11-16-2013 at 02:42 PM.
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Old 11-16-2013, 04:27 PM   #11
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the 1999-2000 323i/323ci use the same size rear rotors. however…
the same year 323Cic/323iT (as in wagon and convertibles) will get the larger rear rotors. these rotors are the same rear size as the 328/325.

so
323i/Ci = 276mm rear rotors
323Cic/323iT/325/328 = 294mm rear rotors
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Old 11-16-2013, 04:50 PM   #12
william donovan
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Really delete the thread....come on, If you had a 2000 323I (and my guess is you don't) the manufacture date is 19/99...say what you want to , however that is what did the job...in spite of what you say
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Old 11-16-2013, 04:52 PM   #13
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Yeah, delete the thread. You're trying to tell people '99 rotors are smaller than '00 rotors. You seem to think there's no possible way on earth that your local parts store stocked their shelves/boxes wrong. Next time, call BMW.
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Old 11-16-2013, 06:33 PM   #14
Alex323Ci
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Quote:
Originally Posted by william donovan View Post
Really delete the thread....come on, If you had a 2000 323I (and my guess is you don't) the manufacture date is 19/99...say what you want to , however that is what did the job...in spite of what you say
well the ETK has been incorrect from time to time.
but i think it has more to do with the more common issue that the Autoparts stores sometimes have their system of parts incorrect. especially since the 323 convertibles and tourings have the larger rear rotors and their system might be set up using those part numbers. the 98/99 cross over year can also be an issue with the E36 and E46 in their database.

I wouldn't expect a BMW dealership to have these parts issues like those Parts chain stores like Pepboys/Autozone.
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