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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-08-2011, 12:54 AM   #1
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Join Date: Oct 2010
Location: Ocean County NJ
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My Ride: 2004 M3 CB/CINN
Automatic trans fluid change ?

Hello I have been searching and found some but not enough info maybe you guys can help. I have an 04 325i with 95k and just purchased. Was always dealer serviced and don't believe they ever changed the tranny fluid BMW says it's lifetime. Should I change it ? And if I do I would do a filter and some say to change the bolts too ?? Any input would be greatly appreciated thanks!
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Old 01-08-2011, 12:58 AM   #2
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I'm pretty positive you're supposed to change this every 30k. I had my clutch replaced about a month ago and my mechanic changed my ATF for me. Wouldn't hurt to change it, that's for sure.
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Old 01-10-2011, 08:41 PM   #3
Mark T.
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Location: Willoughby,Ohio
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My Ride: 2003 325it
The "Life Time" fluid needs to be changed at 100,000 miles, but I would not wait that long. When you change it, change everything... Fluid, Filter, Gasket.
Do a complete change 2 times to make sure most of the old fluid is out of the tranny.

Get the filter and gasket from the dealer. The fluid can be aftermarket. I used Valvoline Max Life Synthetic in mine.

Last edited by Mark T.; 01-10-2011 at 08:43 PM.
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