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General E46 Forum
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Old 04-22-2012, 05:04 PM   #1
99sil328i
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brakes question

i have a 99 328i sedan,my question is what all do need to change rotors and pads,i have the rotors i just need to get the pads,what else do i need to do this job,is it hard to do or not
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Old 04-22-2012, 05:05 PM   #2
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Are you asking material wise or tool wise? If you have rotors and pads thats all you really need, Fluid if you want to flush the brake fluid out. And no Brakes are very easy to do
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Old 04-22-2012, 05:08 PM   #3
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and sensor if you got the warning light...but honestly, did you measure rotors...you might only need a set of front pads...but I guess if you have rotors, they're going on...and not a bad idea at all...you just might not have needed them.

What you do need, though, is information. You won't get that just in your one thread. Read brake diys...see bmw tis at spaghettidecoder.org or study bentley.

It's simple to do, but there are many details...and there are many that have messed this simple thing up. Read until you puke...then you'll be ready.
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Old 04-22-2012, 05:27 PM   #4
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and sensor if you got the warning light...but honestly, did you measure rotors...you might only need a set of front pads...but I guess if you have rotors, they're going on...and not a bad idea at all...you just might not have needed them.

What you do need, though, is information. You won't get that just in your one thread. Read brake diys...see bmw tis at spaghettidecoder.org or study bentley.

It's simple to do, but there are many details...and there are many that have messed this simple thing up. Read until you puke...then you'll be ready.

I just take Sh*t apart and put it back together
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Old 04-22-2012, 05:30 PM   #5
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I just take Sh*t apart and put it back together
Hey, man...I know, that works well too, but there are often things to do that you're not taking apart...like cleaning, greasing, anti-seize.

Guys have removed brake pad warning sensors. With brakes, it'd be nice if OP had more of a clue than he does now.
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Old 04-22-2012, 05:34 PM   #6
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Hey, man...I know, that works well too, but there are often things to do that you're not taking apart...like cleaning, greasing, anti-seize.

Guys have removed brake pad warning sensors. With brakes, it'd be nice if OP had more of a clue than he does now.
True Although the best way to learn is by making mistakes In all seriousness I Look up DIYs for My 330i even though ive done 90% of it on other cars BMW's are always different in some STUPID way haha
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Old 04-22-2012, 05:42 PM   #7
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Here use You Tube ! for a good learning ... take your time study /gather all tools and parts before you tear it down. Do one set a time so you can compare if install issues occur. After few disk brake jobs you'll understand the fundamentals/ and DiY. Inspect the rotors and pads for wear n tear. Pads should be around cm thick newer and rotors shouldnt have any deep wear groves.
Disk brakes are easier than Drums for sure; no spring hassle.

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Old 04-22-2012, 05:44 PM   #8
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DIY section has everything
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Old 04-22-2012, 06:10 PM   #9
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new sensors, brake cleaner, rags, anti-squeal, anti-sieze, beer, diy guide.
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Old 04-23-2012, 07:58 PM   #10
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thanks ^^^^^ i never worked on a bmw before,so this is new to me,i always worked on my stang or take it to shop.....
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Old 04-23-2012, 08:23 PM   #11
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DIY the pads yourself.
Then if things go well, keep the rotors until the next set of pads. Want not waste not
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Old 04-23-2012, 08:36 PM   #12
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I have done brakes before, but not without the warning light on. This time, I will just replace the pads, and the warning light is not on. Should I simply disconnect the battery in order to be able to reuse the sensors? Or can I just disconnect them?
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Old 04-23-2012, 08:50 PM   #13
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Reuse the sensors
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Old 04-23-2012, 08:56 PM   #14
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DIY section has everything
EXCEPT it does not (apparently) say to NOT use the roadside emergency jack.

Never use the factory-supplied jack for anything but roadside emergencies, and then be sure you never put anything under the car that you care about.
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Old 04-23-2012, 09:14 PM   #15
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Reuse the sensors
The sensors are like $9. Why in the hell would you reuse them.
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Old 04-23-2012, 09:21 PM   #16
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The sensors are like $9. Why in the hell would you reuse them.
Because the old sensors are just like brand new ones until the light is triggered. No need to replace if you replace the pads before the dash light is illuminated.
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Old 04-23-2012, 09:26 PM   #17
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Because the old sensors are just like brand new ones until the light is triggered. No need to replace if you replace the pads before the dash light is illuminated.

Well, that's quite true.
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Old 04-23-2012, 09:32 PM   #18
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I have done brakes before, but not without the warning light on. This time, I will just replace the pads, and the warning light is not on. Should I simply disconnect the battery in order to be able to reuse the sensors? Or can I just disconnect them?
So?
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Old 04-23-2012, 09:44 PM   #19
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no need to disconnect the battery.
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