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This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 01-26-2012, 05:52 PM   #1
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Join Date: Jan 2012
Location: Birmingham, Alabama
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My Ride: 2001 330ci
Noob Question about replacing Rear Differential Bushings/Mounts

Hello, I am looking to purchase a 2001 330Ci. The owner is telling me that there is a thud sound when shifting and he suspects the Rear Differential Mount and bushings. Can anyone tell me how complex this is for a DIY project? Also, is there anything I need to know about replacing the mounts/bushings, should I go with OEM or aftermarket parts, if so what brand? Thanks so much in advance for your input. -B
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Old 01-26-2012, 07:18 PM   #2
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I suggest you purchse the neccesary tools to accomplish the job successfully There is threads where the improper tools were used and it took 10 hours whereas I did it myself and took around 4 and that was taking my time. Here is a link to when I did mine, its not exactly a diy but a brief overview. Just search and you will find step by step diy for the job. Its really not that hard. Again make sure to use the proper diff bushing removal tools.



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Originally Posted by Sweetness View Post
You sir, just thread jacked the sh!t out of OP.
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Old 01-26-2012, 10:19 PM   #3
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Assuming that you are serious about this particular 330Ci, then if you haven't already, I would get a pre purchase inspection done by an independent mechanic. Although the diff bushings can certainly cause such a thud, so can other things (i.e. a torn rear subframe). The former can be done with some specialized tools, time and new bushings - all of which will cost a few hundred dollars tops - whereas, the latter can easily cost thousands to fix correctly.

If it is the bushings, get new ones from one of the online dealerships that sponsor the site - my personal favorite is eBMWparts.com.

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Old 01-27-2012, 12:49 PM   #4
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Location: Birmingham, Alabama
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Thanks so much for the replies. I am very serious about purchasing the car, hopefully it will be today. I certainly hope it is only the differential bushings. I have heard of the dreaded subframe This site is really awesome, I've been on many forums, but this one by far is the most informative and the network of people are really really friendly and helpful.
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Old 01-27-2012, 02:24 PM   #5
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If you replace the rear diff bushing yourself, I would highly recommend you don't use a tool to remove the part especially if it is rusted. The reason for this is mainly people, including myself, have snapped the threaded rod when trying to remove the bushing. The easiest and quickest way is to drill out the rubber around the center part, then punch out the center part, and use a hack saw cut it from the inside to the outside without cutting the mount to relieve the pressure. Also, there are several people on the forums that rent out the tool for cheap. Saves a lot of money.
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mounts, rear differential bushing

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