Brake job - Rotor Question - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 07-25-2008, 12:01 AM
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Brake job - Rotor Question

HI, I am new to owning a BMW. I just bought my first one, a used 2002 325i with 58,000 miles.

My light just came on to do a brake job.

So I ordered the professional grade pads from Checker.

Then I heard that often you have to replace the rotors and the sensor at the same time. I have never had to replace rotors unlessed they were visually damaged.

Questions:

1. Are the checker professional brake pads any good? Should I return them and get something else? They cost about $50.

2. Do I need to replace the rotors even if they do not look worn?

3. Do I need to replace the brake sensor even if it does not look damaged?

I don't want to spend more money than necessary, but also do not want to comprimize the braking ability.

Last edited by stonewal32; 07-25-2008 at 12:19 AM.
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#2 (permalink) Old 07-25-2008, 12:52 AM
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If I need rotors, what rotors would you recommend?
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#3 (permalink) Old 07-25-2008, 09:24 AM
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1. Are the checker professional brake pads any good? Should I return them and get something else? They cost about $50.
<<< they're as good as any... but there are different grades. the lowest quality ones put out brake dust which may be unsightly; whereas the newer ceramic brake compounds offer quieter braking and less brake dust.

2. Do I need to replace the rotors even if they do not look worn?
<<< no, you dont need to replace them. If they look scored, u can have them turned at a local shop for about $20.- if u wish to regain a smooth rotor surface. Consider also... if u feel any type of vibration when u brake, your rotors are warped-Rotor warp if minor can turned; otherwise, if the run-out is too much, then replace is the only remedy.

3. If u can transfer them onto the new pads without causing damage to them, by all means-do so
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#4 (permalink) Old 07-25-2008, 09:58 AM
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You don't need new rotors to replace your pads. you only need new rotors if your rotors are warped or scored visually. You can tell if they are warped if your steering wheel wiggles back and forth during braking.

You do need to replace brake sensors. Your brake light came on because your brake sensors have been worn to their little metal contacts, and they need to be replaced. you can get those at bavato.com for pretty cheap.

Pads from an auto parts store might not be the best idea for a BMW. I would look at what bavauto.com has to offer.

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#5 (permalink) Old 07-28-2008, 06:30 PM
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I did the cheapo brake pads on my 320i the sensors did not fit properly and the sensor light does not go off cost us another set of pads and sensors from BMW
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#6 (permalink) Old 07-29-2008, 07:30 PM
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Just replace it all

I would replace everything (pads, rotors, and sensors) since you just bought the car that way you'll know everything is good to go. I just did my 2000 328Ci, it wasn't hard (was my first time). I ordered everything from bavauto.com for less than $350. Great website with excellent customer service if you don't see something just call them they have everything.

A couple of links to help you out:

Doug&apos;s Domain :: BMW Brake Replacement DIY

E46 Brake Pad and Rotor R&R
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#7 (permalink) Old 07-30-2008, 09:26 AM
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Replace all parts

Just replace all the parts. Pads, rotors, and sensor wire. I did my wifes 2000 323I for a total of $165.00 from BavAuto.com. The parts came from Germany. Very good quality. I used the Mintex pads and the brake dust was noticable less than the stock pads. Good luck.
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#8 (permalink) Old 07-31-2008, 07:32 PM
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just a tip.. i purchased pads, rotors and sensor form the dealer.. and to tell you the truth im not to happy with them..they sqeak and give out ALOT of dust..i cant keep my rims clean for more than 2 days...
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#9 (permalink) Old 08-01-2008, 06:43 AM
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The dealer probably installed OEM pads and rotors. The squeaking is from not putting brake pad grease on the back of the pads before installing them. I forgot the grease too and they squeak.
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