E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > E46 Xi Forum

E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 01-28-2013, 07:00 PM   #1
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Brake upgrade for my 325xi

So I bought a set of 17inch wheels and I have a huge void that needs filled in my wheel. I believe 330xi brakes are bigger so question is what is necessary to change my car over to the 330 brakes.

My car is a 2004 325xi. Also I was just planning on doing the front but is there a difference for the rear?

Sent from my AT100 using Bimmer App
mixedgas401 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 01-28-2013, 07:20 PM   #2
simsima325
'a certain moderator'
 
simsima325's Avatar
 
Join Date: Feb 2001
Location: Hyattsville, MD
Posts: 37,805
My Ride: Honda Civic
Do only front. You cannot retro the rear 330 brakes on a 325 without changing a lot of parts (half shafts etc), or you risk losing your parking brake.

http://forum.e46fanatics.com/showthr...389&highlight= Some more info from my experience.
__________________
-Brendan
simsima325 is offline   Reply With Quote
Old 01-28-2013, 07:30 PM   #3
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
My ebrake don't work anyway. So would changing calipers pads and rotors do the rear? It appears the front is a simple CPR swap?

Sent from my AT100 using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-28-2013, 07:31 PM   #4
Kubica
Registered User
 
Join Date: Apr 2008
Location: Boston
Posts: 4,419
My Ride: 2003 325xi
Quote:
Originally Posted by simsima325 View Post
Do only front. You cannot retro the rear 330 brakes on a 325 without changing a lot of parts (half shafts etc), or you risk losing your parking brake.

http://forum.e46fanatics.com/showthr...389&highlight= Some more info from my experience.
That is 100% incorrect. 330 rear brakes fit a 325xi no problem.

OP- you need rotors, pads, and calipers with brackets. That's it.
Kubica is offline   Reply With Quote
Old 01-28-2013, 07:33 PM   #5
simsima325
'a certain moderator'
 
simsima325's Avatar
 
Join Date: Feb 2001
Location: Hyattsville, MD
Posts: 37,805
My Ride: Honda Civic
Is that due to different rear trailing arms on Xi cars?

Read my thread and you will see why this is NOT a direct swap on non Xi cars.
__________________
-Brendan
simsima325 is offline   Reply With Quote
Old 01-28-2013, 07:33 PM   #6
simsima325
'a certain moderator'
 
simsima325's Avatar
 
Join Date: Feb 2001
Location: Hyattsville, MD
Posts: 37,805
My Ride: Honda Civic
and if OPs ebrake doesn't work, have you tried tightening the cable!?!?!
__________________
-Brendan
simsima325 is offline   Reply With Quote
Old 01-28-2013, 07:44 PM   #7
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Never mind. It helps if I read it all. I'm going to call off the rear upgrade for now.

Sent from my AT100 using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-28-2013, 08:18 PM   #8
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
I wouldn't mind doing the whole conversion. I have no problem cutting the shields to make the rotors fit and the ebrake isn't much of a concern since my car is an automatic

Sent from my AT100 using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-28-2013, 09:07 PM   #9
Kubica
Registered User
 
Join Date: Apr 2008
Location: Boston
Posts: 4,419
My Ride: 2003 325xi
Quote:
Originally Posted by simsima325 View Post
Is that due to different rear trailing arms on Xi cars?

Read my thread and you will see why this is NOT a direct swap on non Xi cars.
Yes. All 330's have xi trailing arms. I explained this in a thread a few weeks ago.

You are in the xi forum. Everything is under control. Thanks for checking in. Bye.
Kubica is offline   Reply With Quote
Old 01-29-2013, 05:34 AM   #10
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Wait .......!!!!! I'm confused. Is this a direct swap or not? I understand the front is but what about the rear?

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-29-2013, 10:58 AM   #11
SamDoe1
Registered User
 
Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,520
My Ride: Clubs baby seals
Quote:
Originally Posted by simsima325 View Post
Do only front. You cannot retro the rear 330 brakes on a 325 without changing a lot of parts (half shafts etc), or you risk losing your parking brake.
Untrue.

Quote:
Originally Posted by Kubica View Post
That is 100% incorrect. 330 rear brakes fit a 325xi no problem.

OP- you need rotors, pads, and calipers with brackets. That's it.
^ This.

Quote:
Originally Posted by simsima325 View Post
Is that due to different rear trailing arms on Xi cars?

Read my thread and you will see why this is NOT a direct swap on non Xi cars.
Yes, the 325xi has the same trailing arm as the 330xi and the 330i. If you look for rear brake rotors, you will find that there is a rotor for the 325i, 330i/xi (interchangeable rotors), and 325xi. Rear rotors are NOT interchangeable between the 325i and 325xi. The difference between the 325i and 330i rotors are in the hats and overall diameter. The difference between the 325xi and the 330xi is just in the overall diameter, the hats are the same and therefore the ebrake will work just fine.

The 325xi, 330i, and 330xi all use the same rear suspension.

Quote:
Originally Posted by mixedgas401 View Post
Wait .......!!!!! I'm confused. Is this a direct swap or not? I understand the front is but what about the rear?

Sent from my HTC One X using Bimmer App
You will need to swap calipers, carriers, pads, and rotors on both front and back. No need to mess with trailing arms or any of that sort of thing.

Good luck.

PS: Might I ask what you're looking to get out of this brake "upgrade" other than some extra unsprung weight?

Last edited by SamDoe1; 01-29-2013 at 11:01 AM.
SamDoe1 is offline   Reply With Quote
Old 01-29-2013, 11:06 AM   #12
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
I need a front caliper and all around brake job so I want to just do everything new since I financed this car and am stuck with it for three to five years. It is mainly for looks, so it fills in my wheels better. I have 17s and the 325 brakes look tiny in my wheels

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-29-2013, 11:36 AM   #13
simsima325
'a certain moderator'
 
simsima325's Avatar
 
Join Date: Feb 2001
Location: Hyattsville, MD
Posts: 37,805
My Ride: Honda Civic
Quote:
Originally Posted by Kubica View Post
Yes. All 330's have xi trailing arms. I explained this in a thread a few weeks ago.

You are in the xi forum. Everything is under control. Thanks for checking in. Bye.
No need to be a dick. Congrats on your expansive knowledge of such a fine automobile as the Xi E46.

OP GL with the upgrade, sounds like it might be easy to do the full 330 brake upgrade. I enjoyed my front 330 setup while I owned the car. More consistent braking and it filled out the wheels nicely. Should have been standard from the start on 325.
__________________
-Brendan
simsima325 is offline   Reply With Quote
Old 01-29-2013, 11:39 AM   #14
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Thanks. I'm def excited now that is so easy and I'll be under 200 for all four calipers.

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-29-2013, 11:46 AM   #15
SamDoe1
Registered User
 
Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,520
My Ride: Clubs baby seals
Quote:
Originally Posted by mixedgas401 View Post
I need a front caliper and all around brake job so I want to just do everything new since I financed this car and am stuck with it for three to five years. It is mainly for looks, so it fills in my wheels better. I have 17s and the 325 brakes look tiny in my wheels

Sent from my HTC One X using Bimmer App
So you're doing this only for looks then? Please realize that the larger brakes will have more unsprung weight and will therefore negatively impact your handling and performance.
SamDoe1 is offline   Reply With Quote
Old 01-29-2013, 07:17 PM   #16
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Yeah I understand that but as time goes on I plan to do more upgrades. Within two years I hope to be knowledgeable enough with the software end of these cars to do some sort of forced induction. So not everything is only for looks. I'm going to weigh the calipers and rotors from the 325 and 330 as well. I will post up the differences.

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-29-2013, 07:23 PM   #17
bmwporschefan
Registered User
 
Join Date: Oct 2005
Location: Tampa, FL
Posts: 106
My Ride: 2001 330xi
Quote:
Originally Posted by mixedgas401 View Post
Yeah I understand that but as time goes on I plan to do more upgrades. Within two years I hope to be knowledgeable enough with the software end of these cars to do some sort of forced induction. So not everything is only for looks. I'm going to weigh the calipers and rotors from the 325 and 330 as well. I will post up the differences.

Sent from my HTC One X using Bimmer App
Please do this now that this thread has got my curiosity.
__________________
'01 330xi
bmwporschefan is offline   Reply With Quote
Old 01-29-2013, 07:26 PM   #18
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Well I can't do it right now. I will do it as soon as I have everything together.....which will take a few weeks. Also I will be sure to drain all fluid from the old calipers to make this as accurate as possible

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Old 01-29-2013, 07:29 PM   #19
bmwporschefan
Registered User
 
Join Date: Oct 2005
Location: Tampa, FL
Posts: 106
My Ride: 2001 330xi
Lol I didn't expect you to do it right now. Just when you get to it.
__________________
'01 330xi
bmwporschefan is offline   Reply With Quote
Old 01-29-2013, 07:31 PM   #20
mixedgas401
Registered User
 
Join Date: Jan 2013
Location: NE ohio
Posts: 34
My Ride: 04 325xi
Also I would like to add that I converted an e36 to m3 brakes which I believe are similar part wise and I would guess that it was approximately 5-10 pounds in weight difference. We didn't actually weigh everything but it was for a race car and my boss and I guessed about what was being added. It was only small amounts in the rotors

Sent from my HTC One X using Bimmer App
mixedgas401 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 01:02 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use